docs: add README with CLI reference, TUI guide, and architecture overview

Comprehensive project README covering installation, quick start,
full CLI command table with global flags and examples, TUI dashboard
keybindings and tab descriptions, theme options, configuration format
(TOML + env vars), session key setup instructions, caching behavior,
development commands (make targets), and package architecture diagram.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -83,3 +83,13 @@ Run `cburn setup` for interactive configuration.
 - `components.CardInnerWidth(w)` computes usable width inside a card border.
 - `components.LayoutRow(w, n)` splits width into n columns accounting for gaps.
 - When rendering inline bars (like Activity panel), dynamically compute column widths from actual data to prevent line wrapping.
+
+---
+
+## Architectural Insights (Learned Patterns)
+
+### ANSI Width Calculation
+**Always use `lipgloss.Width()`, never `len()`** for styled strings. `len()` counts raw bytes including ANSI escape sequences (~20 bytes per color code). A 20-char bar with two color codes becomes ~60+ bytes, breaking column layouts. For padding, use custom width-aware padding since `fmt.Sprintf("%*s")` also pads by byte count.
+
+### JSON Top-Level Type Detection
+When parsing JSONL with nested JSON content (like Claude Code sessions), `bytes.Contains(line, pattern)` matches nested strings too. For top-level field detection, track brace depth and skip quoted strings to find the actual top-level `"type"` field.

README.md

@@ -0,0 +1,191 @@
+# cburn
+
+A CLI and TUI dashboard for analyzing Claude Code usage metrics. Parses JSONL session logs from `~/.claude/projects/`, computes token usage, costs, cache efficiency, and activity patterns.
+
+## Installation
+
+```bash
+# Build from source
+make build
+
+# Install to ~/go/bin
+make install
+```
+
+Requires Go 1.24+.
+
+## Quick Start
+
+```bash
+cburn              # Summary of usage metrics
+cburn tui          # Interactive dashboard
+cburn costs        # Cost breakdown by token type
+cburn status       # Claude.ai subscription status
+```
+
+## CLI Commands
+
+| Command | Description |
+|---------|-------------|
+| `cburn` | Usage summary (default) |
+| `cburn summary` | Detailed usage summary with costs |
+| `cburn costs` | Cost breakdown by token type and model |
+| `cburn daily` | Daily usage table |
+| `cburn hourly` | Activity by hour of day |
+| `cburn sessions` | Session list with details |
+| `cburn models` | Model usage breakdown |
+| `cburn projects` | Project usage ranking |
+| `cburn status` | Claude.ai subscription status and rate limits |
+| `cburn config` | Show current configuration |
+| `cburn setup` | Interactive first-time setup wizard |
+| `cburn tui` | Interactive dashboard |
+
+## Global Flags
+
+```
+-n, --days INT        Time window in days (default: 30)
+-p, --project STRING  Filter to project (substring match)
+-m, --model STRING    Filter to model (substring match)
+-d, --data-dir PATH   Claude data directory (default: ~/.claude)
+-q, --quiet           Suppress progress output
+    --no-cache        Skip SQLite cache, reparse everything
+    --no-subagents    Exclude subagent sessions
+```
+
+**Examples:**
+
+```bash
+cburn -n 7                      # Last 7 days
+cburn costs -p myproject        # Costs for a specific project
+cburn sessions -m opus          # Sessions using Opus models
+cburn daily --no-subagents      # Exclude spawned agents
+```
+
+## TUI Dashboard
+
+Launch with `cburn tui`. Navigate with keyboard:
+
+| Key | Action |
+|-----|--------|
+| `o` / `c` / `s` / `b` / `x` | Jump to Overview / Costs / Sessions / Breakdown / Settings |
+| `<-` / `->` | Previous / Next tab |
+| `j` / `k` | Navigate lists |
+| `J` / `K` | Scroll detail pane |
+| `Ctrl+d` / `Ctrl+u` | Scroll half-page |
+| `Enter` / `f` | Expand session full-screen |
+| `Esc` | Back to split view |
+| `r` | Refresh data |
+| `R` | Toggle auto-refresh |
+| `?` | Help overlay |
+| `q` | Quit |
+
+### Tabs
+
+- **Overview** - Summary stats, daily activity chart, live hourly/minute charts
+- **Costs** - Cost breakdown by token type and model, cache savings
+- **Sessions** - Browseable session list with detail pane
+- **Breakdown** - Model and project rankings
+- **Settings** - Configuration management
+
+### Themes
+
+Four color themes are available:
+
+- `flexoki-dark` (default) - Warm earth tones
+- `catppuccin-mocha` - Pastel colors
+- `tokyo-night` - Cool blue/purple
+- `terminal` - ANSI 16 colors only
+
+Change via `cburn setup` or edit `~/.config/cburn/config.toml`.
+
+## Configuration
+
+Config file: `~/.config/cburn/config.toml`
+
+```toml
+[general]
+default_days = 30
+include_subagents = true
+
+[claude_ai]
+session_key = "sk-ant-sid..."    # For subscription/rate limit data
+
+[admin_api]
+api_key = "sk-ant-admin-..."     # For billing API (optional)
+
+[appearance]
+theme = "flexoki-dark"
+
+[budget]
+monthly_usd = 100                 # Optional spending cap
+
+[tui]
+auto_refresh = true
+refresh_interval_sec = 30
+```
+
+### Environment Variables
+
+| Variable | Description |
+|----------|-------------|
+| `CLAUDE_SESSION_KEY` | Claude.ai session key (overrides config) |
+| `ANTHROPIC_ADMIN_KEY` | Admin API key (overrides config) |
+
+### Claude.ai Session Key
+
+The session key enables:
+- Real-time rate limit monitoring (5-hour and 7-day windows)
+- Overage spend tracking
+- Organization info
+
+To get your session key:
+1. Open claude.ai in your browser
+2. DevTools (F12) > Application > Cookies > claude.ai
+3. Copy the `sessionKey` value (starts with `sk-ant-sid...`)
+
+## Caching
+
+Session data is cached in SQLite at `~/.cache/cburn/sessions.db`. The cache uses mtime-based diffing - unchanged files are not reparsed.
+
+Force a full reparse with `--no-cache`.
+
+## Development
+
+```bash
+make build       # Build ./cburn binary
+make install     # Install to ~/go/bin
+make lint        # Run golangci-lint
+make test        # Run unit tests
+make test-race   # Tests with race detector
+make bench       # Pipeline benchmarks
+make fuzz        # Fuzz the JSONL parser (30s default)
+make clean       # Remove binary and test cache
+```
+
+## Architecture
+
+```
+~/.claude/projects/**/*.jsonl
+    -> source.ScanDir() + source.ParseFile()  (parallel parsing)
+    -> store.Cache (SQLite, mtime-based incremental)
+    -> pipeline.Aggregate*() functions
+    -> CLI renderers (cmd/) or TUI tabs (internal/tui/)
+```
+
+| Package | Role |
+|---------|------|
+| `cmd/` | Cobra CLI commands |
+| `internal/source` | File discovery and JSONL parsing |
+| `internal/pipeline` | ETL orchestration and aggregation |
+| `internal/store` | SQLite cache layer |
+| `internal/model` | Domain types |
+| `internal/config` | TOML config and pricing tables |
+| `internal/cli` | Terminal formatting |
+| `internal/claudeai` | Claude.ai API client |
+| `internal/tui` | Bubble Tea dashboard |
+| `internal/tui/components` | Reusable TUI components |
+| `internal/tui/theme` | Color schemes |
+
+## License
+
+MIT

cmd/config_cmd.go

@@ -1,3 +1,4 @@
+// Package cmd implements the cburn CLI commands.
 package cmd
 
 import (
@@ -24,7 +25,7 @@ func runConfig(_ *cobra.Command, _ []string) error {
 		return err
 	}
 
-	fmt.Printf("  Config file: %s\n", config.ConfigPath())
+	fmt.Printf("  Config file: %s\n", config.Path())
 	if config.Exists() {
 		fmt.Println("  Status: loaded")
 	} else {
@@ -40,6 +41,18 @@ func runConfig(_ *cobra.Command, _ []string) error {
 	}
 	fmt.Println()
 
+	fmt.Println("  [Claude.ai]")
+	sessionKey := config.GetSessionKey(cfg)
+	if sessionKey != "" {
+		fmt.Printf("    Session key: %s\n", maskAPIKey(sessionKey))
+	} else {
+		fmt.Println("    Session key: not configured")
+	}
+	if cfg.ClaudeAI.OrgID != "" {
+		fmt.Printf("    Org ID:      %s\n", cfg.ClaudeAI.OrgID)
+	}
+	fmt.Println()
+
 	fmt.Println("  [Admin API]")
 	apiKey := config.GetAdminAPIKey(cfg)
 	if apiKey != "" {

cmd/setup.go

@@ -1,14 +1,15 @@
 package cmd
 
 import (
-	"bufio"
+	"errors"
 	"fmt"
-	"os"
 	"strings"
 
 	"cburn/internal/config"
 	"cburn/internal/source"
+	"cburn/internal/tui/theme"
 
+	"github.com/charmbracelet/huh"
 	"github.com/spf13/cobra"
 )
 
@@ -23,89 +24,119 @@ func init() {
 }
 
 func runSetup(_ *cobra.Command, _ []string) error {
-	reader := bufio.NewReader(os.Stdin)
-
-	// Load existing config or defaults
 	cfg, _ := config.Load()
-
-	// Count sessions
 	files, _ := source.ScanDir(flagDataDir)
 	projectCount := source.CountProjects(files)
 
-	fmt.Println()
+	// Pre-populate from existing config
-	fmt.Println("  Welcome to cburn!")
+	var sessionKey, adminKey string
-	fmt.Println()
+	days := cfg.General.DefaultDays
+	if days == 0 {
+		days = 30
+	}
+	themeName := cfg.Appearance.Theme
+	if themeName == "" {
+		themeName = "flexoki-dark"
+	}
+
+	// Build welcome description
+	welcomeDesc := "Let's configure your dashboard."
 	if len(files) > 0 {
-		fmt.Printf("  Found %s sessions in %s (%d projects)\n\n",
+		welcomeDesc = fmt.Sprintf("Found %d sessions across %d projects in %s.",
-			formatNumber(int64(len(files))), flagDataDir, projectCount)
+			len(files), projectCount, flagDataDir)
 	}
 
-	// 1. API key
+	// Build placeholder text showing masked existing values
-	fmt.Println("  1. Anthropic Admin API key")
+	sessionPlaceholder := "sk-ant-sid... (Enter to skip)"
-	fmt.Println("     For real cost data from the billing API.")
+	if key := config.GetSessionKey(cfg); key != "" {
-	existing := config.GetAdminAPIKey(cfg)
+		sessionPlaceholder = maskAPIKey(key) + " (Enter to keep)"
-	if existing != "" {
-		fmt.Printf("     Current: %s\n", maskAPIKey(existing))
 	}
-	fmt.Print("     > ")
+	adminPlaceholder := "sk-ant-admin-... (Enter to skip)"
-	apiKey, _ := reader.ReadString('\n')
+	if key := config.GetAdminAPIKey(cfg); key != "" {
-	apiKey = strings.TrimSpace(apiKey)
+		adminPlaceholder = maskAPIKey(key) + " (Enter to keep)"
-	if apiKey != "" {
-		cfg.AdminAPI.APIKey = apiKey
-	}
-	fmt.Println()
-
-	// 2. Default time range
-	fmt.Println("  2. Default time range")
-	fmt.Println("     (1) 7 days")
-	fmt.Println("     (2) 30 days [default]")
-	fmt.Println("     (3) 90 days")
-	fmt.Print("     > ")
-	choice, _ := reader.ReadString('\n')
-	choice = strings.TrimSpace(choice)
-	switch choice {
-	case "1":
-		cfg.General.DefaultDays = 7
-	case "3":
-		cfg.General.DefaultDays = 90
-	default:
-		cfg.General.DefaultDays = 30
-	}
-	fmt.Println()
-
-	// 3. Theme
-	fmt.Println("  3. Color theme")
-	fmt.Println("     (1) Flexoki Dark [default]")
-	fmt.Println("     (2) Catppuccin Mocha")
-	fmt.Println("     (3) Tokyo Night")
-	fmt.Println("     (4) Terminal (ANSI 16)")
-	fmt.Print("     > ")
-	themeChoice, _ := reader.ReadString('\n')
-	themeChoice = strings.TrimSpace(themeChoice)
-	switch themeChoice {
-	case "2":
-		cfg.Appearance.Theme = "catppuccin-mocha"
-	case "3":
-		cfg.Appearance.Theme = "tokyo-night"
-	case "4":
-		cfg.Appearance.Theme = "terminal"
-	default:
-		cfg.Appearance.Theme = "flexoki-dark"
 	}
 
-	// Save
+	form := huh.NewForm(
+		huh.NewGroup(
+			huh.NewNote().
+				Title("Welcome to cburn").
+				Description(welcomeDesc).
+				Next(true).
+				NextLabel("Start"),
+		),
+
+		huh.NewGroup(
+			huh.NewInput().
+				Title("Claude.ai session key").
+				Description("For rate-limit and subscription data.\nclaude.ai > DevTools > Application > Cookies > sessionKey").
+				Placeholder(sessionPlaceholder).
+				EchoMode(huh.EchoModePassword).
+				Value(&sessionKey),
+
+			huh.NewInput().
+				Title("Anthropic Admin API key").
+				Description("For real cost data from the billing API.").
+				Placeholder(adminPlaceholder).
+				EchoMode(huh.EchoModePassword).
+				Value(&adminKey),
+		),
+
+		huh.NewGroup(
+			huh.NewSelect[int]().
+				Title("Default time range").
+				Options(
+					huh.NewOption("7 days", 7),
+					huh.NewOption("30 days", 30),
+					huh.NewOption("90 days", 90),
+				).
+				Value(&days),
+
+			huh.NewSelect[string]().
+				Title("Color theme").
+				Options(themeOpts()...).
+				Value(&themeName),
+		),
+	).WithTheme(huh.ThemeDracula())
+
+	if err := form.Run(); err != nil {
+		if errors.Is(err, huh.ErrUserAborted) {
+			fmt.Println("\n  Setup cancelled.")
+			return nil
+		}
+		return fmt.Errorf("setup form: %w", err)
+	}
+
+	// Only overwrite keys if the user typed new ones
+	sessionKey = strings.TrimSpace(sessionKey)
+	if sessionKey != "" {
+		cfg.ClaudeAI.SessionKey = sessionKey
+	}
+	adminKey = strings.TrimSpace(adminKey)
+	if adminKey != "" {
+		cfg.AdminAPI.APIKey = adminKey
+	}
+	cfg.General.DefaultDays = days
+	cfg.Appearance.Theme = themeName
+
 	if err := config.Save(cfg); err != nil {
 		return fmt.Errorf("saving config: %w", err)
 	}
 
-	fmt.Println()
+	fmt.Printf("\n  Saved to %s\n", config.Path())
-	fmt.Printf("  Saved to %s\n", config.ConfigPath())
 	fmt.Println("  Run `cburn setup` anytime to reconfigure.")
 	fmt.Println()
 
 	return nil
 }
 
+func themeOpts() []huh.Option[string] {
+	opts := make([]huh.Option[string], len(theme.All))
+	for i, t := range theme.All {
+		opts[i] = huh.NewOption(t.Name, t.Name)
+	}
+	return opts
+}
+
 func maskAPIKey(key string) string {
 	if len(key) > 16 {
 		return key[:8] + "..." + key[len(key)-4:]

cmd/status.go

@@ -0,0 +1,198 @@
+package cmd
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+	"strings"
+	"time"
+
+	"cburn/internal/claudeai"
+	"cburn/internal/cli"
+	"cburn/internal/config"
+
+	"github.com/charmbracelet/lipgloss"
+	"github.com/spf13/cobra"
+)
+
+var statusCmd = &cobra.Command{
+	Use:   "status",
+	Short: "Show claude.ai subscription status and rate limits",
+	RunE:  runStatus,
+}
+
+func init() {
+	rootCmd.AddCommand(statusCmd)
+}
+
+func runStatus(_ *cobra.Command, _ []string) error {
+	cfg, _ := config.Load()
+	sessionKey := config.GetSessionKey(cfg)
+	if sessionKey == "" {
+		fmt.Println()
+		fmt.Println("  No session key configured.")
+		fmt.Println()
+		fmt.Println("  To get your session key:")
+		fmt.Println("    1. Open claude.ai in your browser")
+		fmt.Println("    2. DevTools (F12) > Application > Cookies > claude.ai")
+		fmt.Println("    3. Copy the 'sessionKey' value (starts with sk-ant-sid...)")
+		fmt.Println()
+		fmt.Println("  Then configure it:")
+		fmt.Println("    cburn setup                                     (interactive)")
+		fmt.Println("    CLAUDE_SESSION_KEY=sk-ant-sid... cburn status    (one-shot)")
+		fmt.Println()
+		return nil
+	}
+
+	client := claudeai.NewClient(sessionKey)
+	if client == nil {
+		return errors.New("invalid session key format (expected sk-ant-sid... prefix)")
+	}
+
+	if !flagQuiet {
+		fmt.Fprintf(os.Stderr, "  Fetching subscription data...\n")
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+	defer cancel()
+
+	data := client.FetchAll(ctx)
+
+	if data.Error != nil {
+		if errors.Is(data.Error, claudeai.ErrUnauthorized) {
+			return errors.New("session key expired or invalid — grab a fresh one from claude.ai cookies")
+		}
+		if errors.Is(data.Error, claudeai.ErrRateLimited) {
+			return errors.New("rate limited by claude.ai — try again in a minute")
+		}
+		// Partial data may still be available, continue rendering
+		if data.Usage == nil && data.Overage == nil {
+			return fmt.Errorf("fetch failed: %w", data.Error)
+		}
+	}
+
+	fmt.Println()
+	fmt.Println(cli.RenderTitle("CLAUDE.AI STATUS"))
+	fmt.Println()
+
+	// Organization info
+	if data.Org.UUID != "" {
+		fmt.Printf("  Organization: %s\n", data.Org.Name)
+		if len(data.Org.Capabilities) > 0 {
+			fmt.Printf("  Capabilities: %s\n", strings.Join(data.Org.Capabilities, ", "))
+		}
+		fmt.Println()
+	}
+
+	// Rate limits
+	if data.Usage != nil {
+		rows := [][]string{}
+
+		if w := data.Usage.FiveHour; w != nil {
+			rows = append(rows, rateLimitRow("5-hour window", w))
+		}
+		if w := data.Usage.SevenDay; w != nil {
+			rows = append(rows, rateLimitRow("7-day (all)", w))
+		}
+		if w := data.Usage.SevenDayOpus; w != nil {
+			rows = append(rows, rateLimitRow("7-day Opus", w))
+		}
+		if w := data.Usage.SevenDaySonnet; w != nil {
+			rows = append(rows, rateLimitRow("7-day Sonnet", w))
+		}
+
+		if len(rows) > 0 {
+			fmt.Print(cli.RenderTable(cli.Table{
+				Title:   "Rate Limits",
+				Headers: []string{"Window", "Used", "Bar", "Resets"},
+				Rows:    rows,
+			}))
+		}
+	}
+
+	// Overage
+	if data.Overage != nil {
+		ol := data.Overage
+		status := "disabled"
+		if ol.IsEnabled {
+			status = "enabled"
+		}
+
+		rows := [][]string{
+			{"Overage", status},
+			{"Used Credits", fmt.Sprintf("%.2f %s", ol.UsedCredits, ol.Currency)},
+			{"Monthly Limit", fmt.Sprintf("%.2f %s", ol.MonthlyCreditLimit, ol.Currency)},
+		}
+
+		if ol.IsEnabled && ol.MonthlyCreditLimit > 0 {
+			pct := ol.UsedCredits / ol.MonthlyCreditLimit
+			rows = append(rows, []string{"Usage", fmt.Sprintf("%.1f%%", pct*100)})
+		}
+
+		fmt.Print(cli.RenderTable(cli.Table{
+			Title:   "Overage Spend",
+			Headers: []string{"Setting", "Value"},
+			Rows:    rows,
+		}))
+	}
+
+	// Partial error warning
+	if data.Error != nil {
+		warnStyle := lipgloss.NewStyle().Foreground(cli.ColorOrange)
+		fmt.Printf("  %s\n\n", warnStyle.Render(fmt.Sprintf("Partial data — %s", data.Error)))
+	}
+
+	fmt.Printf("  Fetched at %s\n\n", data.FetchedAt.Format("3:04:05 PM"))
+
+	return nil
+}
+
+func rateLimitRow(label string, w *claudeai.ParsedWindow) []string {
+	pctStr := fmt.Sprintf("%.0f%%", w.Pct*100)
+	bar := renderMiniBar(w.Pct, 20)
+	resets := ""
+	if !w.ResetsAt.IsZero() {
+		dur := time.Until(w.ResetsAt)
+		if dur > 0 {
+			resets = formatCountdown(dur)
+		} else {
+			resets = "now"
+		}
+	}
+	return []string{label, pctStr, bar, resets}
+}
+
+func renderMiniBar(pct float64, width int) string {
+	if pct < 0 {
+		pct = 0
+	}
+	if pct > 1 {
+		pct = 1
+	}
+	filled := int(pct * float64(width))
+	empty := width - filled
+
+	// Color based on usage level
+	color := cli.ColorGreen
+	if pct >= 0.8 {
+		color = cli.ColorRed
+	} else if pct >= 0.5 {
+		color = cli.ColorOrange
+	}
+
+	barStyle := lipgloss.NewStyle().Foreground(color)
+	dimStyle := lipgloss.NewStyle().Foreground(cli.ColorTextDim)
+
+	return barStyle.Render(strings.Repeat("█", filled)) +
+		dimStyle.Render(strings.Repeat("░", empty))
+}
+
+func formatCountdown(d time.Duration) string {
+	h := int(d.Hours())
+	m := int(d.Minutes()) % 60
+	if h > 0 {
+		return fmt.Sprintf("%dh %dm", h, m)
+	}
+	return fmt.Sprintf("%dm", m)
+}

go.mod

@@ -6,6 +6,7 @@ require (
 	github.com/BurntSushi/toml v1.6.0
 	github.com/charmbracelet/bubbles v1.0.0
 	github.com/charmbracelet/bubbletea v1.3.10
+	github.com/charmbracelet/huh v0.8.0
 	github.com/charmbracelet/lipgloss v1.1.0
 	github.com/spf13/cobra v1.9.1
 	modernc.org/sqlite v1.46.1
@@ -14,9 +15,12 @@ require (
 require (
 	github.com/atotto/clipboard v0.1.4 // indirect
 	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
+	github.com/catppuccin/go v0.3.0 // indirect
 	github.com/charmbracelet/colorprofile v0.4.1 // indirect
+	github.com/charmbracelet/harmonica v0.2.0 // indirect
 	github.com/charmbracelet/x/ansi v0.11.6 // indirect
 	github.com/charmbracelet/x/cellbuf v0.0.15 // indirect
+	github.com/charmbracelet/x/exp/strings v0.0.0-20240722160745-212f7b056ed0 // indirect
 	github.com/charmbracelet/x/term v0.2.2 // indirect
 	github.com/clipperhouse/displaywidth v0.9.0 // indirect
 	github.com/clipperhouse/stringish v0.1.1 // indirect
@@ -29,6 +33,7 @@ require (
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mattn/go-localereader v0.0.1 // indirect
 	github.com/mattn/go-runewidth v0.0.19 // indirect
+	github.com/mitchellh/hashstructure/v2 v2.0.2 // indirect
 	github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 // indirect
 	github.com/muesli/cancelreader v0.2.2 // indirect
 	github.com/muesli/termenv v0.16.0 // indirect
@@ -39,7 +44,7 @@ require (
 	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
 	golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546 // indirect
 	golang.org/x/sys v0.38.0 // indirect
-	golang.org/x/text v0.3.8 // indirect
+	golang.org/x/text v0.23.0 // indirect
 	modernc.org/libc v1.67.6 // indirect
 	modernc.org/mathutil v1.7.1 // indirect
 	modernc.org/memory v1.11.0 // indirect

go.sum

@@ -1,23 +1,45 @@
 github.com/BurntSushi/toml v1.6.0 h1:dRaEfpa2VI55EwlIW72hMRHdWouJeRF7TPYhI+AUQjk=
 github.com/BurntSushi/toml v1.6.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
+github.com/MakeNowJust/heredoc v1.0.0 h1:cXCdzVdstXyiTqTvfqk9SDHpKNjxuom+DOlyEeQ4pzQ=
+github.com/MakeNowJust/heredoc v1.0.0/go.mod h1:mG5amYoWBHf8vpLOuehzbGGw0EHxpZZ6lCpQ4fNJ8LE=
 github.com/atotto/clipboard v0.1.4 h1:EH0zSVneZPSuFR11BlR9YppQTVDbh5+16AmcJi4g1z4=
 github.com/atotto/clipboard v0.1.4/go.mod h1:ZY9tmq7sm5xIbd9bOK4onWV4S6X0u6GY7Vn0Yu86PYI=
 github.com/aymanbagabas/go-osc52/v2 v2.0.1 h1:HwpRHbFMcZLEVr42D4p7XBqjyuxQH5SMiErDT4WkJ2k=
 github.com/aymanbagabas/go-osc52/v2 v2.0.1/go.mod h1:uYgXzlJ7ZpABp8OJ+exZzJJhRNQ2ASbcXHWsFqH8hp8=
+github.com/aymanbagabas/go-udiff v0.3.1 h1:LV+qyBQ2pqe0u42ZsUEtPiCaUoqgA9gYRDs3vj1nolY=
+github.com/aymanbagabas/go-udiff v0.3.1/go.mod h1:G0fsKmG+P6ylD0r6N/KgQD/nWzgfnl8ZBcNLgcbrw8E=
+github.com/catppuccin/go v0.3.0 h1:d+0/YicIq+hSTo5oPuRi5kOpqkVA5tAsU6dNhvRu+aY=
+github.com/catppuccin/go v0.3.0/go.mod h1:8IHJuMGaUUjQM82qBrGNBv7LFq6JI3NnQCF6MOlZjpc=
 github.com/charmbracelet/bubbles v1.0.0 h1:12J8/ak/uCZEMQ6KU7pcfwceyjLlWsDLAxB5fXonfvc=
 github.com/charmbracelet/bubbles v1.0.0/go.mod h1:9d/Zd5GdnauMI5ivUIVisuEm3ave1XwXtD1ckyV6r3E=
 github.com/charmbracelet/bubbletea v1.3.10 h1:otUDHWMMzQSB0Pkc87rm691KZ3SWa4KUlvF9nRvCICw=
 github.com/charmbracelet/bubbletea v1.3.10/go.mod h1:ORQfo0fk8U+po9VaNvnV95UPWA1BitP1E0N6xJPlHr4=
 github.com/charmbracelet/colorprofile v0.4.1 h1:a1lO03qTrSIRaK8c3JRxJDZOvhvIeSco3ej+ngLk1kk=
 github.com/charmbracelet/colorprofile v0.4.1/go.mod h1:U1d9Dljmdf9DLegaJ0nGZNJvoXAhayhmidOdcBwAvKk=
+github.com/charmbracelet/harmonica v0.2.0 h1:8NxJWRWg/bzKqqEaaeFNipOu77YR5t8aSwG4pgaUBiQ=
+github.com/charmbracelet/harmonica v0.2.0/go.mod h1:KSri/1RMQOZLbw7AHqgcBycp8pgJnQMYYT8QZRqZ1Ao=
+github.com/charmbracelet/huh v0.8.0 h1:Xz/Pm2h64cXQZn/Jvele4J3r7DDiqFCNIVteYukxDvY=
+github.com/charmbracelet/huh v0.8.0/go.mod h1:5YVc+SlZ1IhQALxRPpkGwwEKftN/+OlJlnJYlDRFqN4=
 github.com/charmbracelet/lipgloss v1.1.0 h1:vYXsiLHVkK7fp74RkV7b2kq9+zDLoEU4MZoFqR/noCY=
 github.com/charmbracelet/lipgloss v1.1.0/go.mod h1:/6Q8FR2o+kj8rz4Dq0zQc3vYf7X+B0binUUBwA0aL30=
 github.com/charmbracelet/x/ansi v0.11.6 h1:GhV21SiDz/45W9AnV2R61xZMRri5NlLnl6CVF7ihZW8=
 github.com/charmbracelet/x/ansi v0.11.6/go.mod h1:2JNYLgQUsyqaiLovhU2Rv/pb8r6ydXKS3NIttu3VGZQ=
 github.com/charmbracelet/x/cellbuf v0.0.15 h1:ur3pZy0o6z/R7EylET877CBxaiE1Sp1GMxoFPAIztPI=
 github.com/charmbracelet/x/cellbuf v0.0.15/go.mod h1:J1YVbR7MUuEGIFPCaaZ96KDl5NoS0DAWkskup+mOY+Q=
+github.com/charmbracelet/x/conpty v0.1.0 h1:4zc8KaIcbiL4mghEON8D72agYtSeIgq8FSThSPQIb+U=
+github.com/charmbracelet/x/conpty v0.1.0/go.mod h1:rMFsDJoDwVmiYM10aD4bH2XiRgwI7NYJtQgl5yskjEQ=
+github.com/charmbracelet/x/errors v0.0.0-20240508181413-e8d8b6e2de86 h1:JSt3B+U9iqk37QUU2Rvb6DSBYRLtWqFqfxf8l5hOZUA=
+github.com/charmbracelet/x/errors v0.0.0-20240508181413-e8d8b6e2de86/go.mod h1:2P0UgXMEa6TsToMSuFqKFQR+fZTO9CNGUNokkPatT/0=
+github.com/charmbracelet/x/exp/golden v0.0.0-20241011142426-46044092ad91 h1:payRxjMjKgx2PaCWLZ4p3ro9y97+TVLZNaRZgJwSVDQ=
+github.com/charmbracelet/x/exp/golden v0.0.0-20241011142426-46044092ad91/go.mod h1:wDlXFlCrmJ8J+swcL/MnGUuYnqgQdW9rhSD61oNMb6U=
+github.com/charmbracelet/x/exp/strings v0.0.0-20240722160745-212f7b056ed0 h1:qko3AQ4gK1MTS/de7F5hPGx6/k1u0w4TeYmBFwzYVP4=
+github.com/charmbracelet/x/exp/strings v0.0.0-20240722160745-212f7b056ed0/go.mod h1:pBhA0ybfXv6hDjQUZ7hk1lVxBiUbupdw5R31yPUViVQ=
 github.com/charmbracelet/x/term v0.2.2 h1:xVRT/S2ZcKdhhOuSP4t5cLi5o+JxklsoEObBSgfgZRk=
 github.com/charmbracelet/x/term v0.2.2/go.mod h1:kF8CY5RddLWrsgVwpw4kAa6TESp6EB5y3uxGLeCqzAI=
+github.com/charmbracelet/x/termios v0.1.1 h1:o3Q2bT8eqzGnGPOYheoYS8eEleT5ZVNYNy8JawjaNZY=
+github.com/charmbracelet/x/termios v0.1.1/go.mod h1:rB7fnv1TgOPOyyKRJ9o+AsTU/vK5WHJ2ivHeut/Pcwo=
+github.com/charmbracelet/x/xpty v0.1.2 h1:Pqmu4TEJ8KeA9uSkISKMU3f+C1F6OGBn8ABuGlqCbtI=
+github.com/charmbracelet/x/xpty v0.1.2/go.mod h1:XK2Z0id5rtLWcpeNiMYBccNNBrP2IJnzHI0Lq13Xzq4=
 github.com/clipperhouse/displaywidth v0.9.0 h1:Qb4KOhYwRiN3viMv1v/3cTBlz3AcAZX3+y9OLhMtAtA=
 github.com/clipperhouse/displaywidth v0.9.0/go.mod h1:aCAAqTlh4GIVkhQnJpbL0T/WfcrJXHcj8C0yjYcjOZA=
 github.com/clipperhouse/stringish v0.1.1 h1:+NSqMOr3GR6k1FdRhhnXrLfztGzuG+VuFDfatpWHKCs=
@@ -25,6 +47,8 @@ github.com/clipperhouse/stringish v0.1.1/go.mod h1:v/WhFtE1q0ovMta2+m+UbpZ+2/HEX
 github.com/clipperhouse/uax29/v2 v2.5.0 h1:x7T0T4eTHDONxFJsL94uKNKPHrclyFI0lm7+w94cO8U=
 github.com/clipperhouse/uax29/v2 v2.5.0/go.mod h1:Wn1g7MK6OoeDT0vL+Q0SQLDz/KpfsVRgg6W7ihQeh4g=
 github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
+github.com/creack/pty v1.1.24 h1:bJrF4RRfyJnbTJqzRLHzcGaZK1NeM5kTC9jGgovnR1s=
+github.com/creack/pty v1.1.24/go.mod h1:08sCNb52WyoAwi2QDyzUCTgcvVFhUzewun7wtTfvcwE=
 github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
 github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f h1:Y/CXytFA4m6baUTXGLOoWe4PQhGxaX0KpnayAqC48p4=
@@ -45,6 +69,8 @@ github.com/mattn/go-localereader v0.0.1 h1:ygSAOl7ZXTx4RdPYinUpg6W99U8jWvWi9Ye2J
 github.com/mattn/go-localereader v0.0.1/go.mod h1:8fBrzywKY7BI3czFoHkuzRoWE9C+EiG4R1k4Cjx5p88=
 github.com/mattn/go-runewidth v0.0.19 h1:v++JhqYnZuu5jSKrk9RbgF5v4CGUjqRfBm05byFGLdw=
 github.com/mattn/go-runewidth v0.0.19/go.mod h1:XBkDxAl56ILZc9knddidhrOlY5R/pDhgLpndooCuJAs=
+github.com/mitchellh/hashstructure/v2 v2.0.2 h1:vGKWl0YJqUNxE8d+h8f6NJLcCJrgbhC4NcD46KavDd4=
+github.com/mitchellh/hashstructure/v2 v2.0.2/go.mod h1:MG3aRVU/N29oo/V/IhBX8GR/zz4kQkprJgF2EVszyDE=
 github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 h1:ZK8zHtRHOkbHy6Mmr5D264iyp3TiX5OmNcI5cIARiQI=
 github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6/go.mod h1:CJlz5H+gyd6CUWT45Oy4q24RdLyn7Md9Vj2/ldJBSIo=
 github.com/muesli/cancelreader v0.2.2 h1:3I4Kt4BQjOR54NavqnDogx/MIoWBFa0StPA8ELUXHmA=
@@ -74,8 +100,8 @@ golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.38.0 h1:3yZWxaJjBmCWXqhN1qh02AkOnCQ1poK6oF+a7xWL6Gc=
 golang.org/x/sys v0.38.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
-golang.org/x/text v0.3.8 h1:nAL+RVCQ9uMn3vJZbV+MRnydTJFPf8qqY42YiA6MrqY=
+golang.org/x/text v0.23.0 h1:D71I7dUrlY+VX0gQShAThNGHFxZ13dGLBHQLVl1mJlY=
-golang.org/x/text v0.3.8/go.mod h1:E6s5w1FMmriuDzIBO73fBruAKo1PCIq6d2Q6DHfQ8WQ=
+golang.org/x/text v0.23.0/go.mod h1:/BLNzu4aZCJ1+kcD0DNRotWKage4q2rGVAg4o22unh4=
 golang.org/x/tools v0.38.0 h1:Hx2Xv8hISq8Lm16jvBZ2VQf+RLmbd7wVUsALibYI/IQ=
 golang.org/x/tools v0.38.0/go.mod h1:yEsQ/d/YK8cjh0L6rZlY8tgtlKiBNTL14pGDJPJpYQs=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

internal/claudeai/client.go

@@ -0,0 +1,234 @@
+// Package claudeai provides a client for fetching subscription and usage data from claude.ai.
+package claudeai
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"strconv"
+	"strings"
+	"time"
+)
+
+const (
+	baseURL        = "https://claude.ai/api"
+	requestTimeout = 10 * time.Second
+	maxBodySize    = 1 << 20 // 1 MB
+	keyPrefix      = "sk-ant-sid"
+)
+
+var (
+	// ErrUnauthorized indicates the session key is expired or invalid.
+	ErrUnauthorized = errors.New("claudeai: unauthorized (session key expired or invalid)")
+	// ErrRateLimited indicates the API rate limit was hit.
+	ErrRateLimited = errors.New("claudeai: rate limited")
+)
+
+// Client fetches subscription data from the claude.ai web API.
+type Client struct {
+	sessionKey string
+	http       *http.Client
+}
+
+// NewClient creates a client for the given session key.
+// Returns nil if the key is empty or has the wrong prefix.
+func NewClient(sessionKey string) *Client {
+	sessionKey = strings.TrimSpace(sessionKey)
+	if sessionKey == "" {
+		return nil
+	}
+	if !strings.HasPrefix(sessionKey, keyPrefix) {
+		return nil
+	}
+	return &Client{
+		sessionKey: sessionKey,
+		http:       &http.Client{},
+	}
+}
+
+// FetchAll fetches orgs, usage, and overage for the first organization.
+// Partial data is returned even if some requests fail.
+func (c *Client) FetchAll(ctx context.Context) *SubscriptionData {
+	result := &SubscriptionData{FetchedAt: time.Now()}
+
+	orgs, err := c.FetchOrganizations(ctx)
+	if err != nil {
+		result.Error = err
+		return result
+	}
+	if len(orgs) == 0 {
+		result.Error = errors.New("claudeai: no organizations found")
+		return result
+	}
+
+	result.Org = orgs[0]
+	orgID := orgs[0].UUID
+
+	// Fetch usage and overage independently — partial results are fine
+	usage, usageErr := c.FetchUsage(ctx, orgID)
+	if usageErr == nil {
+		result.Usage = usage
+	}
+
+	overage, overageErr := c.FetchOverageLimit(ctx, orgID)
+	if overageErr == nil {
+		result.Overage = overage
+	}
+
+	// Surface first non-nil error for status display
+	if usageErr != nil {
+		result.Error = usageErr
+	} else if overageErr != nil {
+		result.Error = overageErr
+	}
+
+	return result
+}
+
+// FetchOrganizations returns the list of organizations for this session.
+func (c *Client) FetchOrganizations(ctx context.Context) ([]Organization, error) {
+	body, err := c.get(ctx, "/organizations")
+	if err != nil {
+		return nil, err
+	}
+
+	var orgs []Organization
+	if err := json.Unmarshal(body, &orgs); err != nil {
+		return nil, fmt.Errorf("claudeai: parsing organizations: %w", err)
+	}
+	return orgs, nil
+}
+
+// FetchUsage returns parsed usage windows for the given organization.
+func (c *Client) FetchUsage(ctx context.Context, orgID string) (*ParsedUsage, error) {
+	body, err := c.get(ctx, fmt.Sprintf("/organizations/%s/usage", orgID))
+	if err != nil {
+		return nil, err
+	}
+
+	var raw UsageResponse
+	if err := json.Unmarshal(body, &raw); err != nil {
+		return nil, fmt.Errorf("claudeai: parsing usage: %w", err)
+	}
+
+	return &ParsedUsage{
+		FiveHour:       parseWindow(raw.FiveHour),
+		SevenDay:       parseWindow(raw.SevenDay),
+		SevenDayOpus:   parseWindow(raw.SevenDayOpus),
+		SevenDaySonnet: parseWindow(raw.SevenDaySonnet),
+	}, nil
+}
+
+// FetchOverageLimit returns overage spend limit data for the given organization.
+func (c *Client) FetchOverageLimit(ctx context.Context, orgID string) (*OverageLimit, error) {
+	body, err := c.get(ctx, fmt.Sprintf("/organizations/%s/overage_spend_limit", orgID))
+	if err != nil {
+		return nil, err
+	}
+
+	var ol OverageLimit
+	if err := json.Unmarshal(body, &ol); err != nil {
+		return nil, fmt.Errorf("claudeai: parsing overage limit: %w", err)
+	}
+	return &ol, nil
+}
+
+// get performs an authenticated GET request and returns the response body.
+func (c *Client) get(ctx context.Context, path string) ([]byte, error) {
+	ctx, cancel := context.WithTimeout(ctx, requestTimeout)
+	defer cancel()
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, baseURL+path, nil)
+	if err != nil {
+		return nil, fmt.Errorf("claudeai: creating request: %w", err)
+	}
+
+	req.Header.Set("Cookie", "sessionKey="+c.sessionKey)
+	req.Header.Set("Accept", "application/json")
+	req.Header.Set("User-Agent", "cburn/1.0")
+
+	//nolint:gosec // URL is constructed from const baseURL
+	resp, err := c.http.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("claudeai: request failed: %w", err)
+	}
+	defer func() { _ = resp.Body.Close() }()
+
+	switch resp.StatusCode {
+	case http.StatusUnauthorized, http.StatusForbidden:
+		return nil, ErrUnauthorized
+	case http.StatusTooManyRequests:
+		return nil, ErrRateLimited
+	}
+
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		return nil, fmt.Errorf("claudeai: unexpected status %d", resp.StatusCode)
+	}
+
+	body, err := io.ReadAll(io.LimitReader(resp.Body, maxBodySize))
+	if err != nil {
+		return nil, fmt.Errorf("claudeai: reading response: %w", err)
+	}
+	return body, nil
+}
+
+// parseWindow converts a raw UsageWindow into a normalized ParsedWindow.
+// Returns nil if the input is nil or unparseable.
+func parseWindow(w *UsageWindow) *ParsedWindow {
+	if w == nil {
+		return nil
+	}
+
+	pct, ok := parseUtilization(w.Utilization)
+	if !ok {
+		return nil
+	}
+
+	pw := &ParsedWindow{Pct: pct}
+
+	if w.ResetsAt != nil {
+		if t, err := time.Parse(time.RFC3339, *w.ResetsAt); err == nil {
+			pw.ResetsAt = t
+		}
+	}
+
+	return pw
+}
+
+// parseUtilization defensively parses the polymorphic utilization field.
+// Handles int (75), float (0.75 or 75.0), and string ("75%" or "0.75").
+// Returns value normalized to 0.0-1.0 range.
+func parseUtilization(raw json.RawMessage) (float64, bool) {
+	if len(raw) == 0 {
+		return 0, false
+	}
+
+	// Try number first (covers both int and float JSON)
+	var f float64
+	if err := json.Unmarshal(raw, &f); err == nil {
+		return normalizeUtilization(f), true
+	}
+
+	// Try string
+	var s string
+	if err := json.Unmarshal(raw, &s); err == nil {
+		s = strings.TrimSuffix(strings.TrimSpace(s), "%")
+		if v, err := strconv.ParseFloat(s, 64); err == nil {
+			return normalizeUtilization(v), true
+		}
+	}
+
+	return 0, false
+}
+
+// normalizeUtilization converts a value to 0.0-1.0 range.
+// Values > 1.0 are assumed to be percentages (0-100 scale).
+func normalizeUtilization(v float64) float64 {
+	if v > 1.0 {
+		return v / 100.0
+	}
+	return v
+}

internal/claudeai/types.go

@@ -0,0 +1,59 @@
+package claudeai
+
+import (
+	"encoding/json"
+	"time"
+)
+
+// Organization represents a claude.ai organization.
+type Organization struct {
+	UUID         string   `json:"uuid"`
+	Name         string   `json:"name"`
+	Capabilities []string `json:"capabilities"`
+}
+
+// UsageResponse is the raw API response from the usage endpoint.
+type UsageResponse struct {
+	FiveHour       *UsageWindow `json:"five_hour"`
+	SevenDay       *UsageWindow `json:"seven_day"`
+	SevenDayOpus   *UsageWindow `json:"seven_day_opus"`
+	SevenDaySonnet *UsageWindow `json:"seven_day_sonnet"`
+}
+
+// UsageWindow is a single rate-limit window from the API.
+// Utilization can be int, float, or string — kept as raw JSON for defensive parsing.
+type UsageWindow struct {
+	Utilization json.RawMessage `json:"utilization"`
+	ResetsAt    *string         `json:"resets_at"`
+}
+
+// OverageLimit is the raw API response from the overage spend limit endpoint.
+type OverageLimit struct {
+	IsEnabled          bool    `json:"isEnabled"`
+	UsedCredits        float64 `json:"usedCredits"`
+	MonthlyCreditLimit float64 `json:"monthlyCreditLimit"`
+	Currency           string  `json:"currency"`
+}
+
+// SubscriptionData is the parsed, TUI-ready aggregate of all claude.ai API data.
+type SubscriptionData struct {
+	Org       Organization
+	Usage     *ParsedUsage
+	Overage   *OverageLimit
+	FetchedAt time.Time
+	Error     error
+}
+
+// ParsedUsage holds normalized usage windows.
+type ParsedUsage struct {
+	FiveHour       *ParsedWindow
+	SevenDay       *ParsedWindow
+	SevenDayOpus   *ParsedWindow
+	SevenDaySonnet *ParsedWindow
+}
+
+// ParsedWindow is a single rate-limit window, normalized for display.
+type ParsedWindow struct {
+	Pct      float64 // 0.0-1.0
+	ResetsAt time.Time
+}

internal/cli/render.go

@@ -5,23 +5,24 @@ import (
 	"strings"
 
 	"github.com/charmbracelet/lipgloss"
+	"github.com/charmbracelet/lipgloss/table"
 )
 
 // Theme colors (Flexoki Dark)
 var (
-	ColorBg       = lipgloss.Color("#100F0F")
+	ColorBg        = lipgloss.Color("#100F0F")
-	ColorSurface  = lipgloss.Color("#1C1B1A")
+	ColorSurface   = lipgloss.Color("#1C1B1A")
-	ColorBorder   = lipgloss.Color("#282726")
+	ColorBorder    = lipgloss.Color("#282726")
-	ColorTextDim  = lipgloss.Color("#575653")
+	ColorTextDim   = lipgloss.Color("#575653")
 	ColorTextMuted = lipgloss.Color("#6F6E69")
-	ColorText     = lipgloss.Color("#FFFCF0")
+	ColorText      = lipgloss.Color("#FFFCF0")
-	ColorAccent   = lipgloss.Color("#3AA99F")
+	ColorAccent    = lipgloss.Color("#3AA99F")
-	ColorGreen    = lipgloss.Color("#879A39")
+	ColorGreen     = lipgloss.Color("#879A39")
-	ColorOrange   = lipgloss.Color("#DA702C")
+	ColorOrange    = lipgloss.Color("#DA702C")
-	ColorRed      = lipgloss.Color("#D14D41")
+	ColorRed       = lipgloss.Color("#D14D41")
-	ColorBlue     = lipgloss.Color("#4385BE")
+	ColorBlue      = lipgloss.Color("#4385BE")
-	ColorPurple   = lipgloss.Color("#8B7EC8")
+	ColorPurple    = lipgloss.Color("#8B7EC8")
-	ColorYellow   = lipgloss.Color("#D0A215")
+	ColorYellow    = lipgloss.Color("#D0A215")
 )
 
 // Styles
@@ -35,21 +36,9 @@ var (
 			Bold(true).
 			Foreground(ColorAccent)
 
-	valueStyle = lipgloss.NewStyle().
-			Foreground(ColorText)
-
 	mutedStyle = lipgloss.NewStyle().
 			Foreground(ColorTextMuted)
 
-	costStyle = lipgloss.NewStyle().
-			Foreground(ColorGreen)
-
-	tokenStyle = lipgloss.NewStyle().
-			Foreground(ColorBlue)
-
-	warnStyle = lipgloss.NewStyle().
-			Foreground(ColorOrange)
-
 	dimStyle = lipgloss.NewStyle().
 			Foreground(ColorTextDim)
 )
@@ -59,7 +48,6 @@ type Table struct {
 	Title   string
 	Headers []string
 	Rows    [][]string
-	Widths  []int // optional column widths, auto-calculated if nil
 }
 
 // RenderTitle renders a centered title bar in a bordered box.
@@ -75,136 +63,47 @@ func RenderTitle(title string) string {
 	return border.Render(titleStyle.Render(title))
 }
 
-// RenderTable renders a bordered table with headers and rows.
+// RenderTable renders a bordered table with headers and rows using lipgloss/table.
 func RenderTable(t Table) string {
 	if len(t.Rows) == 0 && len(t.Headers) == 0 {
 		return ""
 	}
 
-	// Calculate column widths
+	// Filter out "---" separator sentinels (not supported by lipgloss/table).
-	numCols := len(t.Headers)
+	rows := make([][]string, 0, len(t.Rows))
-	if numCols == 0 && len(t.Rows) > 0 {
+	for _, row := range t.Rows {
-		numCols = len(t.Rows[0])
+		if len(row) == 1 && row[0] == "---" {
+			continue
+		}
+		rows = append(rows, row)
 	}
 
-	widths := make([]int, numCols)
+	tbl := table.New().
-	if t.Widths != nil {
+		Border(lipgloss.RoundedBorder()).
-		copy(widths, t.Widths)
+		BorderStyle(dimStyle).
-	} else {
+		BorderColumn(true).
-		for i, h := range t.Headers {
+		BorderHeader(true).
-			if len(h) > widths[i] {
+		Headers(t.Headers...).
-				widths[i] = len(h)
+		Rows(rows...).
+		StyleFunc(func(row, col int) lipgloss.Style {
+			s := lipgloss.NewStyle().Padding(0, 1)
+			if row == table.HeaderRow {
+				return s.Bold(true).Foreground(ColorAccent)
 			}
-		}
+			s = s.Foreground(ColorText)
-		for _, row := range t.Rows {
+			if col > 0 {
-			for i, cell := range row {
+				s = s.Align(lipgloss.Right)
-				if i < numCols && len(cell) > widths[i] {
-					widths[i] = len(cell)
-				}
 			}
-		}
+			return s
-	}
+		})
 
 	var b strings.Builder
-
-	// Title above table if present
 	if t.Title != "" {
 		b.WriteString("  ")
 		b.WriteString(headerStyle.Render(t.Title))
 		b.WriteString("\n")
 	}
-
+	b.WriteString(tbl.Render())
-	totalWidth := 1 // left border
-	for _, w := range widths {
-		totalWidth += w + 3 // padding + separator
-	}
-
-	// Top border
-	b.WriteString(dimStyle.Render("╭"))
-	for i, w := range widths {
-		b.WriteString(dimStyle.Render(strings.Repeat("─", w+2)))
-		if i < numCols-1 {
-			b.WriteString(dimStyle.Render("┬"))
-		}
-	}
-	b.WriteString(dimStyle.Render("╮"))
-	b.WriteString("\n")
-
-	// Header row
-	if len(t.Headers) > 0 {
-		b.WriteString(dimStyle.Render("│"))
-		for i, h := range t.Headers {
-			w := widths[i]
-			padded := fmt.Sprintf(" %-*s ", w, h)
-			b.WriteString(headerStyle.Render(padded))
-			if i < numCols-1 {
-				b.WriteString(dimStyle.Render("│"))
-			}
-		}
-		b.WriteString(dimStyle.Render("│"))
-		b.WriteString("\n")
-
-		// Header separator
-		b.WriteString(dimStyle.Render("├"))
-		for i, w := range widths {
-			b.WriteString(dimStyle.Render(strings.Repeat("─", w+2)))
-			if i < numCols-1 {
-				b.WriteString(dimStyle.Render("┼"))
-			}
-		}
-		b.WriteString(dimStyle.Render("┤"))
-		b.WriteString("\n")
-	}
-
-	// Data rows
-	for _, row := range t.Rows {
-		if len(row) == 1 && row[0] == "---" {
-			// Separator row
-			b.WriteString(dimStyle.Render("├"))
-			for i, w := range widths {
-				b.WriteString(dimStyle.Render(strings.Repeat("─", w+2)))
-				if i < numCols-1 {
-					b.WriteString(dimStyle.Render("┼"))
-				}
-			}
-			b.WriteString(dimStyle.Render("┤"))
-			b.WriteString("\n")
-			continue
-		}
-
-		b.WriteString(dimStyle.Render("│"))
-		for i := 0; i < numCols; i++ {
-			w := widths[i]
-			cell := ""
-			if i < len(row) {
-				cell = row[i]
-			}
-
-			// Right-align numeric columns (all except first)
-			var padded string
-			if i == 0 {
-				padded = fmt.Sprintf(" %-*s ", w, cell)
-			} else {
-				padded = fmt.Sprintf(" %*s ", w, cell)
-			}
-			b.WriteString(valueStyle.Render(padded))
-			if i < numCols-1 {
-				b.WriteString(dimStyle.Render("│"))
-			}
-		}
-		b.WriteString(dimStyle.Render("│"))
-		b.WriteString("\n")
-	}
-
-	// Bottom border
-	b.WriteString(dimStyle.Render("╰"))
-	for i, w := range widths {
-		b.WriteString(dimStyle.Render(strings.Repeat("─", w+2)))
-		if i < numCols-1 {
-			b.WriteString(dimStyle.Render("┴"))
-		}
-	}
-	b.WriteString(dimStyle.Render("╯"))
 	b.WriteString("\n")
 
 	return b.String()
@@ -242,26 +141,26 @@ func RenderSparkline(values []float64) string {
 
 	blocks := []rune{'▁', '▂', '▃', '▄', '▅', '▆', '▇', '█'}
 
-	max := values[0]
+	maxVal := values[0]
 	for _, v := range values[1:] {
-		if v > max {
+		if v > maxVal {
-			max = v
+			maxVal = v
 		}
 	}
-	if max == 0 {
+	if maxVal == 0 {
-		max = 1
+		maxVal = 1
 	}
 
 	var b strings.Builder
 	for _, v := range values {
-		idx := int(v / max * float64(len(blocks)-1))
+		idx := int(v / maxVal * float64(len(blocks)-1))
 		if idx >= len(blocks) {
 			idx = len(blocks) - 1
 		}
 		if idx < 0 {
 			idx = 0
 		}
-		b.WriteRune(blocks[idx])
+		b.WriteRune(blocks[idx]) //nolint:gosec // bounds checked above
 	}
 
 	return b.String()
@@ -270,12 +169,12 @@ func RenderSparkline(values []float64) string {
 // RenderHorizontalBar renders a horizontal bar chart entry.
 func RenderHorizontalBar(label string, value, maxValue float64, maxWidth int) string {
 	if maxValue <= 0 {
-		return fmt.Sprintf("  %s", label)
+		return "  " + label
 	}
 	barLen := int(value / maxValue * float64(maxWidth))
 	if barLen < 0 {
 		barLen = 0
 	}
 	bar := strings.Repeat("█", barLen)
-	return fmt.Sprintf("  %s", bar)
+	return "  " + bar
 }

internal/config/config.go

@@ -1,3 +1,4 @@
+// Package config handles cburn configuration loading, saving, and pricing.
 package config
 
 import (
@@ -10,11 +11,13 @@ import (
 
 // Config holds all cburn configuration.
 type Config struct {
-	General  GeneralConfig  `toml:"general"`
+	General    GeneralConfig    `toml:"general"`
-	AdminAPI AdminAPIConfig `toml:"admin_api"`
+	AdminAPI   AdminAPIConfig   `toml:"admin_api"`
-	Budget   BudgetConfig   `toml:"budget"`
+	ClaudeAI   ClaudeAIConfig   `toml:"claude_ai"`
+	Budget     BudgetConfig     `toml:"budget"`
 	Appearance AppearanceConfig `toml:"appearance"`
-	Pricing  PricingOverrides `toml:"pricing"`
+	TUI        TUIConfig        `toml:"tui"`
+	Pricing    PricingOverrides `toml:"pricing"`
 }
 
 // GeneralConfig holds general preferences.
@@ -26,10 +29,16 @@ type GeneralConfig struct {
 
 // AdminAPIConfig holds Anthropic Admin API settings.
 type AdminAPIConfig struct {
-	APIKey  string `toml:"api_key,omitempty"`
+	APIKey  string `toml:"api_key,omitempty"` //nolint:gosec // config field, not a secret
 	BaseURL string `toml:"base_url,omitempty"`
 }
 
+// ClaudeAIConfig holds claude.ai session key settings for subscription data.
+type ClaudeAIConfig struct {
+	SessionKey string `toml:"session_key,omitempty"` //nolint:gosec // config field, not a secret
+	OrgID      string `toml:"org_id,omitempty"`      // auto-cached after first fetch
+}
+
 // BudgetConfig holds budget tracking settings.
 type BudgetConfig struct {
 	MonthlyUSD *float64 `toml:"monthly_usd,omitempty"`
@@ -40,6 +49,12 @@ type AppearanceConfig struct {
 	Theme string `toml:"theme"`
 }
 
+// TUIConfig holds TUI-specific settings.
+type TUIConfig struct {
+	AutoRefresh        bool `toml:"auto_refresh"`
+	RefreshIntervalSec int  `toml:"refresh_interval_sec"`
+}
+
 // PricingOverrides allows user-defined pricing for specific models.
 type PricingOverrides struct {
 	Overrides map[string]ModelPricingOverride `toml:"overrides,omitempty"`
@@ -64,11 +79,15 @@ func DefaultConfig() Config {
 		Appearance: AppearanceConfig{
 			Theme: "flexoki-dark",
 		},
+		TUI: TUIConfig{
+			AutoRefresh:        true,
+			RefreshIntervalSec: 30,
+		},
 	}
 }
 
-// ConfigDir returns the XDG-compliant config directory.
+// Dir returns the XDG-compliant config directory.
-func ConfigDir() string {
+func Dir() string {
 	if xdg := os.Getenv("XDG_CONFIG_HOME"); xdg != "" {
 		return filepath.Join(xdg, "cburn")
 	}
@@ -76,16 +95,16 @@ func ConfigDir() string {
 	return filepath.Join(home, ".config", "cburn")
 }
 
-// ConfigPath returns the full path to the config file.
+// Path returns the full path to the config file.
-func ConfigPath() string {
+func Path() string {
-	return filepath.Join(ConfigDir(), "config.toml")
+	return filepath.Join(Dir(), "config.toml")
 }
 
 // Load reads the config file, returning defaults if it doesn't exist.
 func Load() (Config, error) {
 	cfg := DefaultConfig()
 
-	data, err := os.ReadFile(ConfigPath())
+	data, err := os.ReadFile(Path())
 	if err != nil {
 		if os.IsNotExist(err) {
 			return cfg, nil
@@ -102,19 +121,21 @@ func Load() (Config, error) {
 
 // Save writes the config to disk.
 func Save(cfg Config) error {
-	dir := ConfigDir()
+	dir := Dir()
-	if err := os.MkdirAll(dir, 0o755); err != nil {
+	if err := os.MkdirAll(dir, 0o750); err != nil {
 		return fmt.Errorf("creating config dir: %w", err)
 	}
 
-	f, err := os.OpenFile(ConfigPath(), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0o600)
+	f, err := os.OpenFile(Path(), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0o600)
 	if err != nil {
 		return fmt.Errorf("creating config file: %w", err)
 	}
-	defer f.Close()
-
 	enc := toml.NewEncoder(f)
-	return enc.Encode(cfg)
+	if err := enc.Encode(cfg); err != nil {
+		_ = f.Close()
+		return err
+	}
+	return f.Close()
 }
 
 // GetAdminAPIKey returns the API key from env var or config, in that order.
@@ -125,8 +146,16 @@ func GetAdminAPIKey(cfg Config) string {
 	return cfg.AdminAPI.APIKey
 }
 
+// GetSessionKey returns the session key from env var or config, in that order.
+func GetSessionKey(cfg Config) string {
+	if key := os.Getenv("CLAUDE_SESSION_KEY"); key != "" {
+		return key
+	}
+	return cfg.ClaudeAI.SessionKey
+}
+
 // Exists returns true if a config file exists on disk.
 func Exists() bool {
-	_, err := os.Stat(ConfigPath())
+	_, err := os.Stat(Path())
 	return err == nil
 }

internal/model/metrics.go

@@ -92,3 +92,9 @@ type PeriodComparison struct {
 	Current  SummaryStats
 	Previous SummaryStats
 }
+
+// MinuteStats holds token counts for a 5-minute bucket.
+type MinuteStats struct {
+	Minute int // 0-11 (bucket index within the hour)
+	Tokens int64
+}

internal/pipeline/aggregator.go

@@ -271,3 +271,62 @@ func FilterByModel(sessions []model.SessionStats, modelFilter string) []model.Se
 func containsIgnoreCase(s, substr string) bool {
 	return strings.Contains(strings.ToLower(s), strings.ToLower(substr))
 }
+
+// AggregateTodayHourly computes 24 hourly token buckets for today (local time).
+func AggregateTodayHourly(sessions []model.SessionStats) []model.HourlyStats {
+	now := time.Now()
+	todayStart := time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, time.Local)
+	todayEnd := todayStart.Add(24 * time.Hour)
+
+	hours := make([]model.HourlyStats, 24)
+	for i := range hours {
+		hours[i].Hour = i
+	}
+
+	for _, s := range sessions {
+		if s.StartTime.IsZero() {
+			continue
+		}
+		local := s.StartTime.Local()
+		if local.Before(todayStart) || !local.Before(todayEnd) {
+			continue
+		}
+		h := local.Hour()
+		hours[h].Prompts += s.UserMessages
+		hours[h].Sessions++
+		hours[h].Tokens += s.InputTokens + s.OutputTokens
+	}
+	return hours
+}
+
+// AggregateLastHour computes 12 five-minute token buckets for the last 60 minutes.
+func AggregateLastHour(sessions []model.SessionStats) []model.MinuteStats {
+	now := time.Now()
+	hourAgo := now.Add(-1 * time.Hour)
+
+	buckets := make([]model.MinuteStats, 12)
+	for i := range buckets {
+		buckets[i].Minute = i
+	}
+
+	for _, s := range sessions {
+		if s.StartTime.IsZero() {
+			continue
+		}
+		local := s.StartTime.Local()
+		if local.Before(hourAgo) || !local.Before(now) {
+			continue
+		}
+		// Compute which 5-minute bucket (0-11) this falls into
+		minutesAgo := int(now.Sub(local).Minutes())
+		bucketIdx := 11 - (minutesAgo / 5) // 11 = most recent, 0 = oldest
+		if bucketIdx < 0 {
+			bucketIdx = 0
+		}
+		if bucketIdx > 11 {
+			bucketIdx = 11
+		}
+		buckets[bucketIdx].Tokens += s.InputTokens + s.OutputTokens
+	}
+	return buckets
+}

internal/tui/components/card.go

@@ -1,10 +1,7 @@
+// Package components provides reusable TUI widgets for the cburn dashboard.
 package components
 
 import (
-	"fmt"
-	"math"
-	"strings"
-
 	"cburn/internal/tui/theme"
 
 	"github.com/charmbracelet/lipgloss"
@@ -126,312 +123,3 @@ func CardInnerWidth(outerWidth int) int {
 	}
 	return w
 }
-
-// Sparkline renders a unicode sparkline from values.
-func Sparkline(values []float64, color lipgloss.Color) string {
-	if len(values) == 0 {
-		return ""
-	}
-
-	blocks := []rune{'▁', '▂', '▃', '▄', '▅', '▆', '▇', '█'}
-
-	max := values[0]
-	for _, v := range values[1:] {
-		if v > max {
-			max = v
-		}
-	}
-	if max == 0 {
-		max = 1
-	}
-
-	style := lipgloss.NewStyle().Foreground(color)
-
-	var result string
-	for _, v := range values {
-		idx := int(v / max * float64(len(blocks)-1))
-		if idx >= len(blocks) {
-			idx = len(blocks) - 1
-		}
-		if idx < 0 {
-			idx = 0
-		}
-		result += string(blocks[idx])
-	}
-
-	return style.Render(result)
-}
-
-// BarChart renders a multi-row bar chart with anchored Y-axis and optional X-axis labels.
-// labels (if non-nil) should correspond 1:1 with values for x-axis display.
-// height is a target; actual height adjusts slightly so Y-axis ticks are evenly spaced.
-func BarChart(values []float64, labels []string, color lipgloss.Color, width, height int) string {
-	if len(values) == 0 {
-		return ""
-	}
-	if width < 15 || height < 3 {
-		return Sparkline(values, color)
-	}
-
-	t := theme.Active
-
-	// Find max value
-	maxVal := 0.0
-	for _, v := range values {
-		if v > maxVal {
-			maxVal = v
-		}
-	}
-	if maxVal == 0 {
-		maxVal = 1
-	}
-
-	// Y-axis: compute tick step and ceiling, then fit within requested height.
-	// Each interval needs at least 2 rows for readable spacing, so
-	// maxIntervals = height/2. If the initial step gives too many intervals,
-	// double it until they fit.
-	tickStep := chartTickStep(maxVal)
-	maxIntervals := height / 2
-	if maxIntervals < 2 {
-		maxIntervals = 2
-	}
-	for {
-		n := int(math.Ceil(maxVal / tickStep))
-		if n <= maxIntervals {
-			break
-		}
-		tickStep *= 2
-	}
-	ceiling := math.Ceil(maxVal/tickStep) * tickStep
-	numIntervals := int(math.Round(ceiling / tickStep))
-	if numIntervals < 1 {
-		numIntervals = 1
-	}
-
-	// Each interval gets the same number of rows; chart height is an exact multiple.
-	rowsPerTick := height / numIntervals
-	if rowsPerTick < 2 {
-		rowsPerTick = 2
-	}
-	chartH := rowsPerTick * numIntervals
-
-	// Pre-compute tick labels at evenly-spaced row positions
-	yLabelW := len(formatChartLabel(ceiling)) + 1
-	if yLabelW < 4 {
-		yLabelW = 4
-	}
-	tickLabels := make(map[int]string)
-	for i := 1; i <= numIntervals; i++ {
-		row := i * rowsPerTick
-		tickLabels[row] = formatChartLabel(tickStep * float64(i))
-	}
-
-	// Chart area width (excluding y-axis label and axis line char)
-	chartW := width - yLabelW - 1
-	if chartW < 5 {
-		chartW = 5
-	}
-
-	n := len(values)
-
-	// Bar sizing: always use 1-char gaps, target barW >= 2.
-	// If bars don't fit at width 2, subsample to fewer bars.
-	gap := 1
-	if n <= 1 {
-		gap = 0
-	}
-	barW := 2
-	if n > 1 {
-		barW = (chartW - (n - 1)) / n
-	} else if n == 1 {
-		barW = chartW
-	}
-	if barW < 2 && n > 1 {
-		// Subsample so bars fit at width 2 with 1-char gaps
-		maxN := (chartW + 1) / 3 // each bar = 2 chars + 1 gap (last bar no gap)
-		if maxN < 2 {
-			maxN = 2
-		}
-		sampled := make([]float64, maxN)
-		var sampledLabels []string
-		if len(labels) == n {
-			sampledLabels = make([]string, maxN)
-		}
-		for i := range sampled {
-			srcIdx := i * (n - 1) / (maxN - 1)
-			sampled[i] = values[srcIdx]
-			if sampledLabels != nil {
-				sampledLabels[i] = labels[srcIdx]
-			}
-		}
-		values = sampled
-		labels = sampledLabels
-		n = maxN
-		barW = 2
-	}
-	if barW > 6 {
-		barW = 6
-	}
-	axisLen := n*barW + max(0, n-1)*gap
-
-	blocks := []rune{' ', '▁', '▂', '▃', '▄', '▅', '▆', '▇', '█'}
-	barStyle := lipgloss.NewStyle().Foreground(color)
-	axisStyle := lipgloss.NewStyle().Foreground(t.TextDim)
-
-	var b strings.Builder
-
-	// Render rows top to bottom using chartH (aligned to tick intervals)
-	for row := chartH; row >= 1; row-- {
-		rowTop := ceiling * float64(row) / float64(chartH)
-		rowBottom := ceiling * float64(row-1) / float64(chartH)
-
-		label := tickLabels[row]
-		b.WriteString(axisStyle.Render(fmt.Sprintf("%*s", yLabelW, label)))
-		b.WriteString(axisStyle.Render("│"))
-
-		for i, v := range values {
-			if i > 0 && gap > 0 {
-				b.WriteString(strings.Repeat(" ", gap))
-			}
-			if v >= rowTop {
-				b.WriteString(barStyle.Render(strings.Repeat("█", barW)))
-			} else if v > rowBottom {
-				frac := (v - rowBottom) / (rowTop - rowBottom)
-				idx := int(frac * 8)
-				if idx > 8 {
-					idx = 8
-				}
-				if idx < 1 {
-					idx = 1
-				}
-				b.WriteString(barStyle.Render(strings.Repeat(string(blocks[idx]), barW)))
-			} else {
-				b.WriteString(strings.Repeat(" ", barW))
-			}
-		}
-		b.WriteString("\n")
-	}
-
-	// X-axis line with 0 label
-	b.WriteString(axisStyle.Render(fmt.Sprintf("%*s", yLabelW, "0")))
-	b.WriteString(axisStyle.Render("└"))
-	b.WriteString(axisStyle.Render(strings.Repeat("─", axisLen)))
-
-	// X-axis labels
-	if len(labels) == n && n > 0 {
-		buf := make([]byte, axisLen)
-		for i := range buf {
-			buf[i] = ' '
-		}
-
-		// Place labels at bar start positions, skip overlaps
-		minSpacing := 8
-		labelStep := max(1, (n*minSpacing)/(axisLen+1))
-
-		lastEnd := -1
-		for i := 0; i < n; i += labelStep {
-			pos := i * (barW + gap)
-			lbl := labels[i]
-			end := pos + len(lbl)
-			if pos <= lastEnd {
-				continue
-			}
-			if end > axisLen {
-				end = axisLen
-				if end-pos < 3 {
-					continue
-				}
-				lbl = lbl[:end-pos]
-			}
-			copy(buf[pos:end], lbl)
-			lastEnd = end + 1
-		}
-		// Always place the last label, right-aligned to axis edge if needed.
-		// Overwrites any truncated label underneath.
-		if n > 1 && len(labels[n-1]) <= axisLen {
-			lbl := labels[n-1]
-			pos := axisLen - len(lbl)
-			end := axisLen
-			// Clear the area first in case a truncated label is there
-			for j := pos; j < end; j++ {
-				buf[j] = ' '
-			}
-			copy(buf[pos:end], lbl)
-		}
-
-		b.WriteString("\n")
-		b.WriteString(strings.Repeat(" ", yLabelW+1))
-		b.WriteString(axisStyle.Render(strings.TrimRight(string(buf), " ")))
-	}
-
-	return b.String()
-}
-
-// chartTickStep computes a nice tick interval targeting ~5 ticks.
-func chartTickStep(maxVal float64) float64 {
-	if maxVal <= 0 {
-		return 1
-	}
-	rough := maxVal / 5
-	exp := math.Floor(math.Log10(rough))
-	base := math.Pow(10, exp)
-	frac := rough / base
-
-	switch {
-	case frac < 1.5:
-		return base
-	case frac < 3.5:
-		return 2 * base
-	default:
-		return 5 * base
-	}
-}
-
-func formatChartLabel(v float64) string {
-	switch {
-	case v >= 1e9:
-		if v == math.Trunc(v/1e9)*1e9 {
-			return fmt.Sprintf("%.0fB", v/1e9)
-		}
-		return fmt.Sprintf("%.1fB", v/1e9)
-	case v >= 1e6:
-		if v == math.Trunc(v/1e6)*1e6 {
-			return fmt.Sprintf("%.0fM", v/1e6)
-		}
-		return fmt.Sprintf("%.1fM", v/1e6)
-	case v >= 1e3:
-		if v == math.Trunc(v/1e3)*1e3 {
-			return fmt.Sprintf("%.0fk", v/1e3)
-		}
-		return fmt.Sprintf("%.1fk", v/1e3)
-	case v >= 1:
-		return fmt.Sprintf("%.0f", v)
-	default:
-		return fmt.Sprintf("%.2f", v)
-	}
-}
-
-// ProgressBar renders a colored progress bar.
-func ProgressBar(pct float64, width int) string {
-	t := theme.Active
-	filled := int(pct * float64(width))
-	if filled > width {
-		filled = width
-	}
-	if filled < 0 {
-		filled = 0
-	}
-
-	filledStyle := lipgloss.NewStyle().Foreground(t.Accent)
-	emptyStyle := lipgloss.NewStyle().Foreground(t.TextDim)
-
-	bar := ""
-	for i := 0; i < filled; i++ {
-		bar += filledStyle.Render("█")
-	}
-	for i := filled; i < width; i++ {
-		bar += emptyStyle.Render("░")
-	}
-
-	return fmt.Sprintf("%s %.1f%%", bar, pct*100)
-}

internal/tui/components/chart.go

@@ -0,0 +1,303 @@
+package components
+
+import (
+	"fmt"
+	"math"
+	"strings"
+
+	"cburn/internal/tui/theme"
+
+	"github.com/charmbracelet/lipgloss"
+)
+
+// Sparkline renders a unicode sparkline from values.
+func Sparkline(values []float64, color lipgloss.Color) string {
+	if len(values) == 0 {
+		return ""
+	}
+
+	blocks := []rune{'▁', '▂', '▃', '▄', '▅', '▆', '▇', '█'}
+
+	peak := values[0]
+	for _, v := range values[1:] {
+		if v > peak {
+			peak = v
+		}
+	}
+	if peak == 0 {
+		peak = 1
+	}
+
+	style := lipgloss.NewStyle().Foreground(color)
+
+	var buf strings.Builder
+	buf.Grow(len(values) * 4) // UTF-8 block chars are up to 3 bytes
+	for _, v := range values {
+		idx := int(v / peak * float64(len(blocks)-1))
+		if idx >= len(blocks) {
+			idx = len(blocks) - 1
+		}
+		if idx < 0 {
+			idx = 0
+		}
+		buf.WriteRune(blocks[idx]) //nolint:gosec // bounds checked above
+	}
+
+	return style.Render(buf.String())
+}
+
+// BarChart renders a multi-row bar chart with anchored Y-axis and optional X-axis labels.
+// labels (if non-nil) should correspond 1:1 with values for x-axis display.
+// height is a target; actual height adjusts slightly so Y-axis ticks are evenly spaced.
+func BarChart(values []float64, labels []string, color lipgloss.Color, width, height int) string {
+	if len(values) == 0 {
+		return ""
+	}
+	if width < 15 || height < 3 {
+		return Sparkline(values, color)
+	}
+
+	t := theme.Active
+
+	// Find max value
+	maxVal := 0.0
+	for _, v := range values {
+		if v > maxVal {
+			maxVal = v
+		}
+	}
+	if maxVal == 0 {
+		maxVal = 1
+	}
+
+	// Y-axis: compute tick step and ceiling, then fit within requested height.
+	// Each interval needs at least 2 rows for readable spacing, so
+	// maxIntervals = height/2. If the initial step gives too many intervals,
+	// double it until they fit.
+	tickStep := chartTickStep(maxVal)
+	maxIntervals := height / 2
+	if maxIntervals < 2 {
+		maxIntervals = 2
+	}
+	for {
+		n := int(math.Ceil(maxVal / tickStep))
+		if n <= maxIntervals {
+			break
+		}
+		tickStep *= 2
+	}
+	ceiling := math.Ceil(maxVal/tickStep) * tickStep
+	numIntervals := int(math.Round(ceiling / tickStep))
+	if numIntervals < 1 {
+		numIntervals = 1
+	}
+
+	// Each interval gets the same number of rows; chart height is an exact multiple.
+	rowsPerTick := height / numIntervals
+	if rowsPerTick < 2 {
+		rowsPerTick = 2
+	}
+	chartH := rowsPerTick * numIntervals
+
+	// Pre-compute tick labels at evenly-spaced row positions
+	yLabelW := len(formatChartLabel(ceiling)) + 1
+	if yLabelW < 4 {
+		yLabelW = 4
+	}
+	tickLabels := make(map[int]string)
+	for i := 1; i <= numIntervals; i++ {
+		row := i * rowsPerTick
+		tickLabels[row] = formatChartLabel(tickStep * float64(i))
+	}
+
+	// Chart area width (excluding y-axis label and axis line char)
+	chartW := width - yLabelW - 1
+	if chartW < 5 {
+		chartW = 5
+	}
+
+	n := len(values)
+
+	// Bar sizing: always use 1-char gaps, target barW >= 2.
+	// If bars don't fit at width 2, subsample to fewer bars.
+	gap := 1
+	if n <= 1 {
+		gap = 0
+	}
+	barW := 2
+	if n > 1 {
+		barW = (chartW - (n - 1)) / n
+	} else if n == 1 {
+		barW = chartW
+	}
+	if barW < 2 && n > 1 {
+		// Subsample so bars fit at width 2 with 1-char gaps
+		maxN := (chartW + 1) / 3 // each bar = 2 chars + 1 gap (last bar no gap)
+		if maxN < 2 {
+			maxN = 2
+		}
+		sampled := make([]float64, maxN)
+		var sampledLabels []string
+		if len(labels) == n {
+			sampledLabels = make([]string, maxN)
+		}
+		for i := range sampled {
+			srcIdx := i * (n - 1) / (maxN - 1)
+			sampled[i] = values[srcIdx]
+			if sampledLabels != nil {
+				sampledLabels[i] = labels[srcIdx]
+			}
+		}
+		values = sampled
+		labels = sampledLabels
+		n = maxN
+		barW = 2
+	}
+	if barW > 6 {
+		barW = 6
+	}
+	axisLen := n*barW + max(0, n-1)*gap
+
+	blocks := []rune{' ', '▁', '▂', '▃', '▄', '▅', '▆', '▇', '█'}
+	barStyle := lipgloss.NewStyle().Foreground(color)
+	axisStyle := lipgloss.NewStyle().Foreground(t.TextDim)
+
+	var b strings.Builder
+
+	// Render rows top to bottom using chartH (aligned to tick intervals)
+	for row := chartH; row >= 1; row-- {
+		rowTop := ceiling * float64(row) / float64(chartH)
+		rowBottom := ceiling * float64(row-1) / float64(chartH)
+
+		label := tickLabels[row]
+		b.WriteString(axisStyle.Render(fmt.Sprintf("%*s", yLabelW, label)))
+		b.WriteString(axisStyle.Render("│"))
+
+		for i, v := range values {
+			if i > 0 && gap > 0 {
+				b.WriteString(strings.Repeat(" ", gap))
+			}
+			switch {
+			case v >= rowTop:
+				b.WriteString(barStyle.Render(strings.Repeat("\u2588", barW)))
+			case v > rowBottom:
+				frac := (v - rowBottom) / (rowTop - rowBottom)
+				idx := int(frac * 8)
+				if idx > 8 {
+					idx = 8
+				}
+				if idx < 1 {
+					idx = 1
+				}
+				b.WriteString(barStyle.Render(strings.Repeat(string(blocks[idx]), barW)))
+			default:
+				b.WriteString(strings.Repeat(" ", barW))
+			}
+		}
+		b.WriteString("\n")
+	}
+
+	// X-axis line with 0 label
+	b.WriteString(axisStyle.Render(fmt.Sprintf("%*s", yLabelW, "0")))
+	b.WriteString(axisStyle.Render("└"))
+	b.WriteString(axisStyle.Render(strings.Repeat("─", axisLen)))
+
+	// X-axis labels
+	if len(labels) == n && n > 0 {
+		buf := make([]byte, axisLen)
+		for i := range buf {
+			buf[i] = ' '
+		}
+
+		// Place labels at bar start positions, skip overlaps
+		minSpacing := 8
+		labelStep := max(1, (n*minSpacing)/(axisLen+1))
+
+		lastEnd := -1
+		for i := 0; i < n; i += labelStep {
+			pos := i * (barW + gap)
+			lbl := labels[i]
+			end := pos + len(lbl)
+			if pos <= lastEnd {
+				continue
+			}
+			if end > axisLen {
+				end = axisLen
+				if end-pos < 3 {
+					continue
+				}
+				lbl = lbl[:end-pos]
+			}
+			copy(buf[pos:end], lbl)
+			lastEnd = end + 1
+		}
+		// Always attempt the last label (the loop may skip it due to labelStep).
+		// Right-align to axis edge if it would overflow.
+		if n > 1 {
+			lbl := labels[n-1]
+			pos := (n - 1) * (barW + gap)
+			end := pos + len(lbl)
+			if end > axisLen {
+				// Right-align: shift left so it ends at the axis edge
+				pos = axisLen - len(lbl)
+				end = axisLen
+			}
+			if pos >= 0 && pos > lastEnd {
+				for j := pos; j < end; j++ {
+					buf[j] = ' '
+				}
+				copy(buf[pos:end], lbl)
+			}
+		}
+
+		b.WriteString("\n")
+		b.WriteString(strings.Repeat(" ", yLabelW+1))
+		b.WriteString(axisStyle.Render(strings.TrimRight(string(buf), " ")))
+	}
+
+	return b.String()
+}
+
+// chartTickStep computes a nice tick interval targeting ~5 ticks.
+func chartTickStep(maxVal float64) float64 {
+	if maxVal <= 0 {
+		return 1
+	}
+	rough := maxVal / 5
+	exp := math.Floor(math.Log10(rough))
+	base := math.Pow(10, exp)
+	frac := rough / base
+
+	switch {
+	case frac < 1.5:
+		return base
+	case frac < 3.5:
+		return 2 * base
+	default:
+		return 5 * base
+	}
+}
+
+func formatChartLabel(v float64) string {
+	switch {
+	case v >= 1e9:
+		if v == math.Trunc(v/1e9)*1e9 {
+			return fmt.Sprintf("%.0fB", v/1e9)
+		}
+		return fmt.Sprintf("%.1fB", v/1e9)
+	case v >= 1e6:
+		if v == math.Trunc(v/1e6)*1e6 {
+			return fmt.Sprintf("%.0fM", v/1e6)
+		}
+		return fmt.Sprintf("%.1fM", v/1e6)
+	case v >= 1e3:
+		if v == math.Trunc(v/1e3)*1e3 {
+			return fmt.Sprintf("%.0fk", v/1e3)
+		}
+		return fmt.Sprintf("%.1fk", v/1e3)
+	case v >= 1:
+		return fmt.Sprintf("%.0f", v)
+	default:
+		return fmt.Sprintf("%.2f", v)
+	}
+}

internal/tui/components/progress.go

@@ -0,0 +1,142 @@
+package components
+
+import (
+	"fmt"
+	"strings"
+	"time"
+
+	"cburn/internal/tui/theme"
+
+	"github.com/charmbracelet/bubbles/progress"
+	"github.com/charmbracelet/lipgloss"
+)
+
+// ProgressBar renders a colored progress bar.
+func ProgressBar(pct float64, width int) string {
+	t := theme.Active
+	filled := int(pct * float64(width))
+	if filled > width {
+		filled = width
+	}
+	if filled < 0 {
+		filled = 0
+	}
+
+	filledStyle := lipgloss.NewStyle().Foreground(t.Accent)
+	emptyStyle := lipgloss.NewStyle().Foreground(t.TextDim)
+
+	var b strings.Builder
+	for i := 0; i < filled; i++ {
+		b.WriteString(filledStyle.Render("\u2588"))
+	}
+	for i := filled; i < width; i++ {
+		b.WriteString(emptyStyle.Render("\u2591"))
+	}
+
+	return fmt.Sprintf("%s %.1f%%", b.String(), pct*100)
+}
+
+// ColorForPct returns green/yellow/red based on utilization level.
+func ColorForPct(pct float64) string {
+	t := theme.Active
+	switch {
+	case pct >= 0.8:
+		return string(t.Red)
+	case pct >= 0.5:
+		return string(t.Orange)
+	default:
+		return string(t.Green)
+	}
+}
+
+// RateLimitBar renders a labeled progress bar with percentage and countdown.
+// label: "5-hour", "Weekly", etc.  pct: 0.0-1.0.  resetsAt: zero means no countdown.
+// barWidth: width allocated for the progress bar portion only.
+func RateLimitBar(label string, pct float64, resetsAt time.Time, labelW, barWidth int) string {
+	t := theme.Active
+
+	if pct < 0 {
+		pct = 0
+	}
+	if pct > 1 {
+		pct = 1
+	}
+
+	bar := progress.New(
+		progress.WithSolidFill(ColorForPct(pct)),
+		progress.WithWidth(barWidth),
+		progress.WithoutPercentage(),
+	)
+	bar.EmptyColor = string(t.TextDim)
+
+	labelStyle := lipgloss.NewStyle().Foreground(t.TextMuted)
+	pctStyle := lipgloss.NewStyle().Foreground(t.TextPrimary).Bold(true)
+	countdownStyle := lipgloss.NewStyle().Foreground(t.TextDim)
+
+	pctStr := fmt.Sprintf("%3.0f%%", pct*100)
+	countdown := ""
+	if !resetsAt.IsZero() {
+		dur := time.Until(resetsAt)
+		if dur > 0 {
+			countdown = formatCountdown(dur)
+		} else {
+			countdown = "now"
+		}
+	}
+
+	return fmt.Sprintf("%s %s %s  %s",
+		labelStyle.Render(fmt.Sprintf("%-*s", labelW, label)),
+		bar.ViewAs(pct),
+		pctStyle.Render(pctStr),
+		countdownStyle.Render(countdown),
+	)
+}
+
+// CompactRateBar renders a tiny status-bar-sized rate indicator.
+// Example output: "5h ████░░░░ 42%"
+func CompactRateBar(label string, pct float64, width int) string {
+	t := theme.Active
+
+	if pct < 0 {
+		pct = 0
+	}
+	if pct > 1 {
+		pct = 1
+	}
+
+	// label + space + bar + space + pct(4 chars)
+	barW := width - lipgloss.Width(label) - 6
+	if barW < 4 {
+		barW = 4
+	}
+
+	bar := progress.New(
+		progress.WithSolidFill(ColorForPct(pct)),
+		progress.WithWidth(barW),
+		progress.WithoutPercentage(),
+	)
+	bar.EmptyColor = string(t.TextDim)
+
+	pctStyle := lipgloss.NewStyle().Foreground(lipgloss.Color(ColorForPct(pct)))
+	labelStyle := lipgloss.NewStyle().Foreground(t.TextMuted)
+
+	return fmt.Sprintf("%s %s %s",
+		labelStyle.Render(label),
+		bar.ViewAs(pct),
+		pctStyle.Render(fmt.Sprintf("%2.0f%%", pct*100)),
+	)
+}
+
+func formatCountdown(d time.Duration) string {
+	h := int(d.Hours())
+	m := int(d.Minutes()) % 60
+	if h >= 24 {
+		days := h / 24
+		hours := h % 24
+		return fmt.Sprintf("%dd %dh", days, hours)
+	}
+	if h > 0 {
+		return fmt.Sprintf("%dh %dm", h, m)
+	}
+	return fmt.Sprintf("%dm", m)
+}

internal/tui/components/statusbar.go

@@ -2,37 +2,108 @@ package components
 
 import (
 	"fmt"
+	"strings"
 
+	"cburn/internal/claudeai"
 	"cburn/internal/tui/theme"
 
+	"github.com/charmbracelet/bubbles/progress"
 	"github.com/charmbracelet/lipgloss"
 )
 
-// RenderStatusBar renders the bottom status bar.
+// RenderStatusBar renders the bottom status bar with optional rate limit indicators.
-func RenderStatusBar(width int, dataAge string) string {
+func RenderStatusBar(width int, dataAge string, subData *claudeai.SubscriptionData, refreshing, autoRefresh bool) string {
 	t := theme.Active
 
 	style := lipgloss.NewStyle().
 		Foreground(t.TextMuted).
 		Width(width)
 
-	left := " [?]help  [q]uit"
+	left := " [?]help  [r]efresh  [q]uit"
-	right := ""
+
-	if dataAge != "" {
+	// Build rate limit indicators for the middle section
-		right = fmt.Sprintf("Data: %s ", dataAge)
+	ratePart := renderStatusRateLimits(subData)
+
+	// Build right side with refresh status
+	var right string
+	if refreshing {
+		refreshStyle := lipgloss.NewStyle().Foreground(t.Accent)
+		right = refreshStyle.Render("↻ refreshing ")
+	} else if dataAge != "" {
+		autoStr := ""
+		if autoRefresh {
+			autoStr = "↻ "
+		}
+		right = fmt.Sprintf("%sData: %s ", autoStr, dataAge)
 	}
 
-	// Pad middle
+	// Layout: left + ratePart + right, with padding distributed
-	padding := width - lipgloss.Width(left) - lipgloss.Width(right)
+	usedWidth := lipgloss.Width(left) + lipgloss.Width(ratePart) + lipgloss.Width(right)
+	padding := width - usedWidth
 	if padding < 0 {
 		padding = 0
 	}
 
-	bar := left
+	// Split padding: more on the left side of rate indicators
-	for i := 0; i < padding; i++ {
+	leftPad := padding / 2
-		bar += " "
+	rightPad := padding - leftPad
-	}
+
-	bar += right
+	bar := left + strings.Repeat(" ", leftPad) + ratePart + strings.Repeat(" ", rightPad) + right
 
 	return style.Render(bar)
 }
+
+// renderStatusRateLimits renders compact rate limit bars for the status bar.
+func renderStatusRateLimits(subData *claudeai.SubscriptionData) string {
+	if subData == nil || subData.Usage == nil {
+		return ""
+	}
+
+	t := theme.Active
+	sepStyle := lipgloss.NewStyle().Foreground(t.TextDim)
+
+	var parts []string
+
+	if w := subData.Usage.FiveHour; w != nil {
+		parts = append(parts, compactStatusBar("5h", w.Pct))
+	}
+	if w := subData.Usage.SevenDay; w != nil {
+		parts = append(parts, compactStatusBar("Wk", w.Pct))
+	}
+
+	if len(parts) == 0 {
+		return ""
+	}
+
+	return strings.Join(parts, sepStyle.Render(" | "))
+}
+
+// compactStatusBar renders a tiny inline progress indicator for the status bar.
+// Format: "5h ████░░░░ 42%"
+func compactStatusBar(label string, pct float64) string {
+	t := theme.Active
+
+	if pct < 0 {
+		pct = 0
+	}
+	if pct > 1 {
+		pct = 1
+	}
+
+	barW := 8
+	bar := progress.New(
+		progress.WithSolidFill(ColorForPct(pct)),
+		progress.WithWidth(barW),
+		progress.WithoutPercentage(),
+	)
+	bar.EmptyColor = string(t.TextDim)
+
+	labelStyle := lipgloss.NewStyle().Foreground(t.TextMuted)
+	pctStyle := lipgloss.NewStyle().Foreground(lipgloss.Color(ColorForPct(pct)))
+
+	return fmt.Sprintf("%s %s %s",
+		labelStyle.Render(label),
+		bar.ViewAs(pct),
+		pctStyle.Render(fmt.Sprintf("%2.0f%%", pct*100)),
+	)
+}

internal/tui/components/tabbar.go

@@ -10,23 +10,18 @@ import (
 
 // Tab represents a single tab in the tab bar.
 type Tab struct {
-	Name    string
+	Name   string
-	Key     rune
+	Key    rune
-	KeyPos  int // position of the shortcut letter in the name (-1 if not in name)
+	KeyPos int // position of the shortcut letter in the name (-1 if not in name)
 }
 
 // Tabs defines all available tabs.
 var Tabs = []Tab{
-	{Name: "Dashboard", Key: 'd', KeyPos: 0},
+	{Name: "Overview", Key: 'o', KeyPos: 0},
 	{Name: "Costs", Key: 'c', KeyPos: 0},
 	{Name: "Sessions", Key: 's', KeyPos: 0},
-	{Name: "Models", Key: 'm', KeyPos: 0},
+	{Name: "Breakdown", Key: 'b', KeyPos: 0},
-	{Name: "Projects", Key: 'p', KeyPos: 0},
+	{Name: "Settings", Key: 'x', KeyPos: -1},
-	{Name: "Trends", Key: 't', KeyPos: 0},
-	{Name: "Efficiency", Key: 'e', KeyPos: 0},
-	{Name: "Activity", Key: 'a', KeyPos: 0},
-	{Name: "Budget", Key: 'b', KeyPos: 0},
-	{Name: "Settings", Key: 'x', KeyPos: -1}, // x is not in "Settings"
 }
 
 // RenderTabBar renders the tab bar with the given active index.
@@ -47,7 +42,7 @@ func RenderTabBar(activeIdx int, width int) string {
 	dimKeyStyle := lipgloss.NewStyle().
 		Foreground(t.TextDim)
 
-	var parts []string
+	parts := make([]string, 0, len(Tabs))
 	for i, tab := range Tabs {
 		var rendered string
 		if i == activeIdx {
@@ -70,25 +65,9 @@ func RenderTabBar(activeIdx int, width int) string {
 		parts = append(parts, rendered)
 	}
 
-	// Single row if all tabs fit
+	bar := " " + strings.Join(parts, "  ")
-	full := " " + strings.Join(parts, "  ")
+	if lipgloss.Width(bar) <= width {
-	if lipgloss.Width(full) <= width {
+		return bar
-		return full
 	}
-
+	return lipgloss.NewStyle().MaxWidth(width).Render(bar)
-	// Fall back to two rows
-	row1 := strings.Join(parts[:5], "  ")
-	row2 := strings.Join(parts[5:], "  ")
-
-	return " " + row1 + "\n " + row2
-}
-
-// TabIdxByKey returns the tab index for a given key press, or -1.
-func TabIdxByKey(key rune) int {
-	for i, tab := range Tabs {
-		if tab.Key == key {
-			return i
-		}
-	}
-	return -1
 }

internal/tui/setup.go

@@ -2,151 +2,125 @@ package tui
 
 import (
 	"fmt"
-	"strings"
 
 	"cburn/internal/config"
 	"cburn/internal/tui/theme"
 
-	"github.com/charmbracelet/bubbles/textinput"
+	"github.com/charmbracelet/huh"
-	"github.com/charmbracelet/lipgloss"
 )
 
-// setupState tracks the first-run setup wizard state.
+// setupValues holds the form-bound variables for the setup wizard.
-type setupState struct {
+type setupValues struct {
-	active    bool
+	sessionKey string
-	step      int // 0=welcome, 1=api key, 2=days, 3=theme, 4=done
+	adminKey   string
-	apiKeyIn  textinput.Model
+	days       int
-	daysChoice int   // index into daysOptions
+	theme      string
-	themeChoice int  // index into theme.All
-	saveErr    error // non-nil if config save failed
 }
 
-var daysOptions = []struct {
+// newSetupForm builds the huh form for first-run configuration.
-	label string
+func newSetupForm(numSessions int, claudeDir string, vals *setupValues) *huh.Form {
-	value int
-}{
-	{"7 days", 7},
-	{"30 days", 30},
-	{"90 days", 90},
-}
-
-func newSetupState() setupState {
-	ti := textinput.New()
-	ti.Placeholder = "sk-ant-admin-... (or press Enter to skip)"
-	ti.CharLimit = 256
-	ti.Width = 50
-	ti.EchoMode = textinput.EchoPassword
-	ti.EchoCharacter = '*'
-
-	return setupState{
-		apiKeyIn:   ti,
-		daysChoice: 1, // default 30 days
-	}
-}
-
-func (a App) renderSetup() string {
-	t := theme.Active
-	ss := a.setup
-
-	titleStyle := lipgloss.NewStyle().Foreground(t.Accent).Bold(true)
-	labelStyle := lipgloss.NewStyle().Foreground(t.TextMuted)
-	valueStyle := lipgloss.NewStyle().Foreground(t.TextPrimary)
-	accentStyle := lipgloss.NewStyle().Foreground(t.Accent)
-	greenStyle := lipgloss.NewStyle().Foreground(t.Green)
-
-	var b strings.Builder
-	b.WriteString("\n\n")
-	b.WriteString(titleStyle.Render("  Welcome to cburn!"))
-	b.WriteString("\n\n")
-
-	b.WriteString(labelStyle.Render(fmt.Sprintf("  Found %s sessions in %s",
-		valueStyle.Render(fmt.Sprintf("%d", len(a.sessions))),
-		valueStyle.Render(a.claudeDir))))
-	b.WriteString("\n\n")
-
-	switch ss.step {
-	case 0: // Welcome
-		b.WriteString(valueStyle.Render("  Let's set up a few things."))
-		b.WriteString("\n\n")
-		b.WriteString(accentStyle.Render("  Press Enter to continue"))
-
-	case 1: // API key
-		b.WriteString(valueStyle.Render("  1. Anthropic Admin API key"))
-		b.WriteString("\n")
-		b.WriteString(labelStyle.Render("     For real cost data from the billing API."))
-		b.WriteString("\n")
-		b.WriteString(labelStyle.Render("     Get one at console.anthropic.com > Settings > Admin API keys"))
-		b.WriteString("\n\n")
-		b.WriteString("     ")
-		b.WriteString(ss.apiKeyIn.View())
-		b.WriteString("\n\n")
-		b.WriteString(labelStyle.Render("     Press Enter to continue (leave blank to skip)"))
-
-	case 2: // Default days
-		b.WriteString(valueStyle.Render("  2. Default time range"))
-		b.WriteString("\n\n")
-		for i, opt := range daysOptions {
-			if i == ss.daysChoice {
-				b.WriteString(accentStyle.Render(fmt.Sprintf("     (o) %s", opt.label)))
-			} else {
-				b.WriteString(labelStyle.Render(fmt.Sprintf("     ( ) %s", opt.label)))
-			}
-			b.WriteString("\n")
-		}
-		b.WriteString("\n")
-		b.WriteString(labelStyle.Render("     j/k to select, Enter to confirm"))
-
-	case 3: // Theme
-		b.WriteString(valueStyle.Render("  3. Color theme"))
-		b.WriteString("\n\n")
-		for i, th := range theme.All {
-			if i == ss.themeChoice {
-				b.WriteString(accentStyle.Render(fmt.Sprintf("     (o) %s", th.Name)))
-			} else {
-				b.WriteString(labelStyle.Render(fmt.Sprintf("     ( ) %s", th.Name)))
-			}
-			b.WriteString("\n")
-		}
-		b.WriteString("\n")
-		b.WriteString(labelStyle.Render("     j/k to select, Enter to confirm"))
-
-	case 4: // Done
-		if ss.saveErr != nil {
-			warnStyle := lipgloss.NewStyle().Foreground(t.Orange)
-			b.WriteString(warnStyle.Render(fmt.Sprintf("  Could not save config: %s", ss.saveErr)))
-			b.WriteString("\n")
-			b.WriteString(labelStyle.Render("  Settings will apply for this session only."))
-		} else {
-			b.WriteString(greenStyle.Render("  All set!"))
-			b.WriteString("\n\n")
-			b.WriteString(labelStyle.Render("  Saved to ~/.config/cburn/config.toml"))
-			b.WriteString("\n")
-			b.WriteString(labelStyle.Render("  Run `cburn setup` anytime to reconfigure."))
-		}
-		b.WriteString("\n\n")
-		b.WriteString(accentStyle.Render("  Press Enter to launch the dashboard"))
-	}
-
-	return b.String()
-}
-
-func (a *App) saveSetupConfig() {
 	cfg, _ := config.Load()
 
-	apiKey := strings.TrimSpace(a.setup.apiKeyIn.Value())
+	// Pre-populate defaults
-	if apiKey != "" {
+	vals.days = cfg.General.DefaultDays
-		cfg.AdminAPI.APIKey = apiKey
+	if vals.days == 0 {
+		vals.days = 30
+	}
+	vals.theme = cfg.Appearance.Theme
+	if vals.theme == "" {
+		vals.theme = "flexoki-dark"
 	}
 
-	if a.setup.daysChoice >= 0 && a.setup.daysChoice < len(daysOptions) {
+	// Build welcome text
-		cfg.General.DefaultDays = daysOptions[a.setup.daysChoice].value
+	welcomeDesc := "Let's configure your dashboard."
-		a.days = cfg.General.DefaultDays
+	if numSessions > 0 {
+		welcomeDesc = fmt.Sprintf("Found %d sessions in %s.", numSessions, claudeDir)
 	}
 
-	if a.setup.themeChoice >= 0 && a.setup.themeChoice < len(theme.All) {
+	// Placeholder text for key fields
-		cfg.Appearance.Theme = theme.All[a.setup.themeChoice].Name
+	sessionPlaceholder := "sk-ant-sid... (Enter to skip)"
-		theme.SetActive(cfg.Appearance.Theme)
+	if key := config.GetSessionKey(cfg); key != "" {
+		sessionPlaceholder = maskKey(key) + " (Enter to keep)"
+	}
+	adminPlaceholder := "sk-ant-admin-... (Enter to skip)"
+	if key := config.GetAdminAPIKey(cfg); key != "" {
+		adminPlaceholder = maskKey(key) + " (Enter to keep)"
 	}
 
-	a.setup.saveErr = config.Save(cfg)
+	// Build theme options from the registered theme list
+	themeOpts := make([]huh.Option[string], len(theme.All))
+	for i, t := range theme.All {
+		themeOpts[i] = huh.NewOption(t.Name, t.Name)
+	}
+
+	return huh.NewForm(
+		huh.NewGroup(
+			huh.NewNote().
+				Title("Welcome to cburn").
+				Description(welcomeDesc).
+				Next(true).
+				NextLabel("Start"),
+		),
+
+		huh.NewGroup(
+			huh.NewInput().
+				Title("Claude.ai session key").
+				Description("For rate-limit and subscription data.\nclaude.ai > DevTools > Application > Cookies > sessionKey").
+				Placeholder(sessionPlaceholder).
+				EchoMode(huh.EchoModePassword).
+				Value(&vals.sessionKey),
+
+			huh.NewInput().
+				Title("Anthropic Admin API key").
+				Description("For real cost data from the billing API.").
+				Placeholder(adminPlaceholder).
+				EchoMode(huh.EchoModePassword).
+				Value(&vals.adminKey),
+		),
+
+		huh.NewGroup(
+			huh.NewSelect[int]().
+				Title("Default time range").
+				Options(
+					huh.NewOption("7 days", 7),
+					huh.NewOption("30 days", 30),
+					huh.NewOption("90 days", 90),
+				).
+				Value(&vals.days),
+
+			huh.NewSelect[string]().
+				Title("Color theme").
+				Options(themeOpts...).
+				Value(&vals.theme),
+		),
+	).WithTheme(huh.ThemeDracula()).WithShowHelp(false)
+}
+
+// saveSetupConfig persists the setup wizard values to the config file.
+func (a *App) saveSetupConfig() error {
+	cfg, _ := config.Load()
+
+	if a.setupVals.sessionKey != "" {
+		cfg.ClaudeAI.SessionKey = a.setupVals.sessionKey
+	}
+	if a.setupVals.adminKey != "" {
+		cfg.AdminAPI.APIKey = a.setupVals.adminKey
+	}
+	cfg.General.DefaultDays = a.setupVals.days
+	a.days = a.setupVals.days
+
+	cfg.Appearance.Theme = a.setupVals.theme
+	theme.SetActive(a.setupVals.theme)
+
+	return config.Save(cfg)
+}
+
+func maskKey(key string) string {
+	if len(key) > 16 {
+		return key[:8] + "..." + key[len(key)-4:]
+	}
+	if len(key) > 4 {
+		return key[:4] + "..."
+	}
+	return "****"
 }

internal/tui/tab_breakdown.go

@@ -0,0 +1,129 @@
+package tui
+
+import (
+	"fmt"
+	"strings"
+
+	"cburn/internal/cli"
+	"cburn/internal/tui/components"
+	"cburn/internal/tui/theme"
+
+	"github.com/charmbracelet/lipgloss"
+)
+
+func (a App) renderModelsTab(cw int) string {
+	t := theme.Active
+	models := a.models
+
+	innerW := components.CardInnerWidth(cw)
+	fixedCols := 8 + 10 + 10 + 10 + 6 // Calls, Input, Output, Cost, Share
+	gaps := 5
+	nameW := innerW - fixedCols - gaps
+	if nameW < 14 {
+		nameW = 14
+	}
+
+	headerStyle := lipgloss.NewStyle().Foreground(t.Accent).Bold(true)
+	rowStyle := lipgloss.NewStyle().Foreground(t.TextPrimary)
+
+	var tableBody strings.Builder
+	if a.isCompactLayout() {
+		shareW := 6
+		costW := 10
+		callW := 8
+		nameW = innerW - shareW - costW - callW - 3
+		if nameW < 10 {
+			nameW = 10
+		}
+		tableBody.WriteString(headerStyle.Render(fmt.Sprintf("%-*s %8s %10s %6s", nameW, "Model", "Calls", "Cost", "Share")))
+		tableBody.WriteString("\n")
+
+		for _, ms := range models {
+			tableBody.WriteString(rowStyle.Render(fmt.Sprintf("%-*s %8s %10s %5.1f%%",
+				nameW,
+				truncStr(shortModel(ms.Model), nameW),
+				cli.FormatNumber(int64(ms.APICalls)),
+				cli.FormatCost(ms.EstimatedCost),
+				ms.SharePercent)))
+			tableBody.WriteString("\n")
+		}
+	} else {
+		tableBody.WriteString(headerStyle.Render(fmt.Sprintf("%-*s %8s %10s %10s %10s %6s", nameW, "Model", "Calls", "Input", "Output", "Cost", "Share")))
+		tableBody.WriteString("\n")
+
+		for _, ms := range models {
+			tableBody.WriteString(rowStyle.Render(fmt.Sprintf("%-*s %8s %10s %10s %10s %5.1f%%",
+				nameW,
+				truncStr(shortModel(ms.Model), nameW),
+				cli.FormatNumber(int64(ms.APICalls)),
+				cli.FormatTokens(ms.InputTokens),
+				cli.FormatTokens(ms.OutputTokens),
+				cli.FormatCost(ms.EstimatedCost),
+				ms.SharePercent)))
+			tableBody.WriteString("\n")
+		}
+	}
+
+	return components.ContentCard("Model Usage", tableBody.String(), cw)
+}
+
+func (a App) renderProjectsTab(cw int) string {
+	t := theme.Active
+	projects := a.projects
+
+	innerW := components.CardInnerWidth(cw)
+	fixedCols := 6 + 8 + 10 + 10 // Sess, Prompts, Tokens, Cost
+	gaps := 4
+	nameW := innerW - fixedCols - gaps
+	if nameW < 18 {
+		nameW = 18
+	}
+
+	headerStyle := lipgloss.NewStyle().Foreground(t.Accent).Bold(true)
+	rowStyle := lipgloss.NewStyle().Foreground(t.TextPrimary)
+
+	var tableBody strings.Builder
+	if a.isCompactLayout() {
+		costW := 10
+		sessW := 6
+		nameW = innerW - costW - sessW - 2
+		if nameW < 12 {
+			nameW = 12
+		}
+		tableBody.WriteString(headerStyle.Render(fmt.Sprintf("%-*s %6s %10s", nameW, "Project", "Sess.", "Cost")))
+		tableBody.WriteString("\n")
+
+		for _, ps := range projects {
+			tableBody.WriteString(rowStyle.Render(fmt.Sprintf("%-*s %6d %10s",
+				nameW,
+				truncStr(ps.Project, nameW),
+				ps.Sessions,
+				cli.FormatCost(ps.EstimatedCost))))
+			tableBody.WriteString("\n")
+		}
+	} else {
+		tableBody.WriteString(headerStyle.Render(fmt.Sprintf("%-*s %6s %8s %10s %10s", nameW, "Project", "Sess.", "Prompts", "Tokens", "Cost")))
+		tableBody.WriteString("\n")
+
+		for _, ps := range projects {
+			tableBody.WriteString(rowStyle.Render(fmt.Sprintf("%-*s %6d %8s %10s %10s",
+				nameW,
+				truncStr(ps.Project, nameW),
+				ps.Sessions,
+				cli.FormatNumber(int64(ps.Prompts)),
+				cli.FormatTokens(ps.TotalTokens),
+				cli.FormatCost(ps.EstimatedCost))))
+			tableBody.WriteString("\n")
+		}
+	}
+
+	return components.ContentCard("Projects", tableBody.String(), cw)
+}
+
+func (a App) renderBreakdownTab(cw int) string {
+	var b strings.Builder
+	b.WriteString(a.renderModelsTab(cw))
+	b.WriteString("\n")
+	b.WriteString(a.renderProjectsTab(cw))
+	return b.String()
+}

internal/tui/tab_costs.go

@@ -0,0 +1,319 @@
+package tui
+
+import (
+	"fmt"
+	"sort"
+	"strings"
+	"time"
+
+	"cburn/internal/claudeai"
+	"cburn/internal/cli"
+	"cburn/internal/config"
+	"cburn/internal/model"
+	"cburn/internal/tui/components"
+	"cburn/internal/tui/theme"
+
+	"github.com/charmbracelet/bubbles/progress"
+	"github.com/charmbracelet/lipgloss"
+)
+
+func (a App) renderCostsTab(cw int) string {
+	t := theme.Active
+	stats := a.stats
+	models := a.models
+	days := a.dailyStats
+
+	var b strings.Builder
+
+	// Row 0: Subscription rate limits (live data from claude.ai)
+	b.WriteString(a.renderSubscriptionCard(cw))
+
+	// Row 1: Cost metric cards
+	savingsMultiplier := 0.0
+	if stats.EstimatedCost > 0 {
+		savingsMultiplier = stats.CacheSavings / stats.EstimatedCost
+	}
+	costCards := []struct{ Label, Value, Delta string }{
+		{"Total Cost", cli.FormatCost(stats.EstimatedCost), cli.FormatCost(stats.CostPerDay) + "/day"},
+		{"Cache Savings", cli.FormatCost(stats.CacheSavings), fmt.Sprintf("%.1fx cost", savingsMultiplier)},
+		{"Projected", cli.FormatCost(stats.CostPerDay*30) + "/mo", cli.FormatCost(stats.CostPerDay) + "/day"},
+		{"Cache Rate", cli.FormatPercent(stats.CacheHitRate), ""},
+	}
+	b.WriteString(components.MetricCardRow(costCards, cw))
+	b.WriteString("\n")
+
+	// Row 2: Cost breakdown table
+	innerW := components.CardInnerWidth(cw)
+	fixedCols := 10 + 10 + 10 + 10
+	gaps := 4
+	nameW := innerW - fixedCols - gaps
+	if nameW < 14 {
+		nameW = 14
+	}
+
+	headerStyle := lipgloss.NewStyle().Foreground(t.Accent).Bold(true)
+	rowStyle := lipgloss.NewStyle().Foreground(t.TextPrimary)
+	mutedStyle := lipgloss.NewStyle().Foreground(t.TextMuted)
+	labelStyle := lipgloss.NewStyle().Foreground(t.TextMuted)
+	valueStyle := lipgloss.NewStyle().Foreground(t.TextPrimary)
+
+	var tableBody strings.Builder
+	if a.isCompactLayout() {
+		totalW := 10
+		nameW = innerW - totalW - 1
+		if nameW < 10 {
+			nameW = 10
+		}
+		tableBody.WriteString(headerStyle.Render(fmt.Sprintf("%-*s %10s", nameW, "Model", "Total")))
+		tableBody.WriteString("\n")
+		tableBody.WriteString(mutedStyle.Render(strings.Repeat("─", nameW+totalW+1)))
+		tableBody.WriteString("\n")
+
+		for _, ms := range models {
+			tableBody.WriteString(rowStyle.Render(fmt.Sprintf("%-*s %10s",
+				nameW,
+				truncStr(shortModel(ms.Model), nameW),
+				cli.FormatCost(ms.EstimatedCost))))
+			tableBody.WriteString("\n")
+		}
+		tableBody.WriteString(mutedStyle.Render(strings.Repeat("─", nameW+totalW+1)))
+	} else {
+		tableBody.WriteString(headerStyle.Render(fmt.Sprintf("%-*s %10s %10s %10s %10s", nameW, "Model", "Input", "Output", "Cache", "Total")))
+		tableBody.WriteString("\n")
+		tableBody.WriteString(mutedStyle.Render(strings.Repeat("─", innerW)))
+		tableBody.WriteString("\n")
+
+		for _, ms := range models {
+			inputCost := 0.0
+			outputCost := 0.0
+			if p, ok := config.LookupPricing(ms.Model); ok {
+				inputCost = float64(ms.InputTokens) * p.InputPerMTok / 1e6
+				outputCost = float64(ms.OutputTokens) * p.OutputPerMTok / 1e6
+			}
+			cacheCost := ms.EstimatedCost - inputCost - outputCost
+
+			tableBody.WriteString(rowStyle.Render(fmt.Sprintf("%-*s %10s %10s %10s %10s",
+				nameW,
+				truncStr(shortModel(ms.Model), nameW),
+				cli.FormatCost(inputCost),
+				cli.FormatCost(outputCost),
+				cli.FormatCost(cacheCost),
+				cli.FormatCost(ms.EstimatedCost))))
+			tableBody.WriteString("\n")
+		}
+
+		tableBody.WriteString(mutedStyle.Render(strings.Repeat("─", innerW)))
+	}
+
+	title := fmt.Sprintf("Cost Breakdown  %s (%dd)", cli.FormatCost(stats.EstimatedCost), a.days)
+	b.WriteString(components.ContentCard(title, tableBody.String(), cw))
+	b.WriteString("\n")
+
+	// Row 3: Budget progress + Top Spend Days
+	halves := components.LayoutRow(cw, 2)
+
+	// Use real overage data if available, otherwise show placeholder
+	var progressCard string
+	if a.subData != nil && a.subData.Overage != nil && a.subData.Overage.IsEnabled {
+		ol := a.subData.Overage
+		pct := 0.0
+		if ol.MonthlyCreditLimit > 0 {
+			pct = ol.UsedCredits / ol.MonthlyCreditLimit
+		}
+
+		barW := components.CardInnerWidth(halves[0]) - 10
+		if barW < 10 {
+			barW = 10
+		}
+		bar := progress.New(
+			progress.WithSolidFill(components.ColorForPct(pct)),
+			progress.WithWidth(barW),
+			progress.WithoutPercentage(),
+		)
+		bar.EmptyColor = string(t.TextDim)
+
+		var body strings.Builder
+		body.WriteString(bar.ViewAs(pct))
+		fmt.Fprintf(&body, " %.0f%%\n", pct*100)
+		fmt.Fprintf(&body, "%s  %s / %s %s",
+			labelStyle.Render("Used"),
+			valueStyle.Render(fmt.Sprintf("$%.2f", ol.UsedCredits)),
+			valueStyle.Render(fmt.Sprintf("$%.2f", ol.MonthlyCreditLimit)),
+			labelStyle.Render(ol.Currency))
+
+		progressCard = components.ContentCard("Overage Spend", body.String(), halves[0])
+	} else {
+		ceiling := 200.0
+		pct := stats.EstimatedCost / ceiling
+		progressInnerW := components.CardInnerWidth(halves[0])
+		progressBody := components.ProgressBar(pct, progressInnerW-10) + "\n" +
+			labelStyle.Render("flat-rate plan ceiling")
+		progressCard = components.ContentCard("Budget Progress", progressBody, halves[0])
+	}
+
+	var spendBody strings.Builder
+	if len(days) > 0 {
+		spendLimit := 5
+		if len(days) < spendLimit {
+			spendLimit = len(days)
+		}
+		sorted := make([]model.DailyStats, len(days))
+		copy(sorted, days)
+		sort.Slice(sorted, func(i, j int) bool {
+			return sorted[i].EstimatedCost > sorted[j].EstimatedCost
+		})
+		topDays := sorted[:spendLimit]
+		sort.Slice(topDays, func(i, j int) bool {
+			return topDays[i].Date.After(topDays[j].Date)
+		})
+		for _, d := range topDays {
+			fmt.Fprintf(&spendBody, "%s  %s\n",
+				valueStyle.Render(d.Date.Format("Jan 02")),
+				lipgloss.NewStyle().Foreground(t.Green).Render(cli.FormatCost(d.EstimatedCost)))
+		}
+	} else {
+		spendBody.WriteString("No data\n")
+	}
+	spendCard := components.ContentCard("Top Spend Days", spendBody.String(), halves[1])
+
+	if a.isCompactLayout() {
+		b.WriteString(progressCard)
+		b.WriteString("\n")
+		b.WriteString(components.ContentCard("Top Spend Days", spendBody.String(), cw))
+	} else {
+		b.WriteString(components.CardRow([]string{progressCard, spendCard}))
+	}
+	b.WriteString("\n")
+
+	// Row 4: Efficiency metrics
+	tokPerPrompt := int64(0)
+	outPerPrompt := int64(0)
+	if stats.TotalPrompts > 0 {
+		tokPerPrompt = (stats.InputTokens + stats.OutputTokens) / int64(stats.TotalPrompts)
+		outPerPrompt = stats.OutputTokens / int64(stats.TotalPrompts)
+	}
+	promptsPerSess := 0.0
+	if stats.TotalSessions > 0 {
+		promptsPerSess = float64(stats.TotalPrompts) / float64(stats.TotalSessions)
+	}
+
+	effMetrics := []struct{ name, value string }{
+		{"Tokens/Prompt", cli.FormatTokens(tokPerPrompt)},
+		{"Output/Prompt", cli.FormatTokens(outPerPrompt)},
+		{"Prompts/Session", fmt.Sprintf("%.1f", promptsPerSess)},
+		{"Minutes/Day", fmt.Sprintf("%.0f", stats.MinutesPerDay)},
+	}
+
+	var effBody strings.Builder
+	for _, m := range effMetrics {
+		effBody.WriteString(rowStyle.Render(fmt.Sprintf("%-20s %10s", m.name, m.value)))
+		effBody.WriteString("\n")
+	}
+
+	b.WriteString(components.ContentCard("Efficiency", effBody.String(), cw))
+
+	return b.String()
+}
+
+// renderSubscriptionCard renders the rate limit + overage card at the top of the costs tab.
+func (a App) renderSubscriptionCard(cw int) string {
+	t := theme.Active
+	hintStyle := lipgloss.NewStyle().Foreground(t.TextDim)
+
+	// No session key configured
+	if a.subData == nil && !a.subFetching {
+		cfg, _ := config.Load()
+		if config.GetSessionKey(cfg) == "" {
+			return components.ContentCard("Subscription",
+				hintStyle.Render("Configure session key in Settings to see rate limits"),
+				cw) + "\n"
+		}
+		// Key configured but no data yet (initial fetch in progress)
+		return components.ContentCard("Subscription",
+			hintStyle.Render("Fetching rate limits..."),
+			cw) + "\n"
+	}
+
+	// Still fetching
+	if a.subData == nil {
+		return components.ContentCard("Subscription",
+			hintStyle.Render("Fetching rate limits..."),
+			cw) + "\n"
+	}
+
+	// Error with no usable data
+	if a.subData.Usage == nil && a.subData.Error != nil {
+		warnStyle := lipgloss.NewStyle().Foreground(t.Orange)
+		return components.ContentCard("Subscription",
+			warnStyle.Render(fmt.Sprintf("Error: %s", a.subData.Error)),
+			cw) + "\n"
+	}
+
+	// No usage data at all
+	if a.subData.Usage == nil {
+		return ""
+	}
+
+	innerW := components.CardInnerWidth(cw)
+	labelW := 13                 // enough for "Weekly Sonnet"
+	barW := innerW - labelW - 16 // label + bar + pct(5) + countdown(~10) + gaps
+	if barW < 10 {
+		barW = 10
+	}
+
+	var body strings.Builder
+
+	type windowRow struct {
+		label  string
+		window *claudeai.ParsedWindow
+	}
+
+	rows := []windowRow{}
+	if w := a.subData.Usage.FiveHour; w != nil {
+		rows = append(rows, windowRow{"5-hour", w})
+	}
+	if w := a.subData.Usage.SevenDay; w != nil {
+		rows = append(rows, windowRow{"Weekly", w})
+	}
+	if w := a.subData.Usage.SevenDayOpus; w != nil {
+		rows = append(rows, windowRow{"Weekly Opus", w})
+	}
+	if w := a.subData.Usage.SevenDaySonnet; w != nil {
+		rows = append(rows, windowRow{"Weekly Sonnet", w})
+	}
+
+	for i, r := range rows {
+		body.WriteString(components.RateLimitBar(r.label, r.window.Pct, r.window.ResetsAt, labelW, barW))
+		if i < len(rows)-1 {
+			body.WriteString("\n")
+		}
+	}
+
+	// Overage line if enabled
+	if ol := a.subData.Overage; ol != nil && ol.IsEnabled && ol.MonthlyCreditLimit > 0 {
+		pct := ol.UsedCredits / ol.MonthlyCreditLimit
+		body.WriteString("\n")
+		body.WriteString(lipgloss.NewStyle().Foreground(t.TextDim).Render(strings.Repeat("─", innerW)))
+		body.WriteString("\n")
+		body.WriteString(components.RateLimitBar("Overage",
+			pct, time.Time{}, labelW, barW))
+
+		spendStyle := lipgloss.NewStyle().Foreground(t.TextDim)
+		body.WriteString(spendStyle.Render(
+			fmt.Sprintf("  $%.2f / $%.2f", ol.UsedCredits, ol.MonthlyCreditLimit)))
+	}
+
+	// Fetch timestamp
+	if !a.subData.FetchedAt.IsZero() {
+		body.WriteString("\n")
+		tsStyle := lipgloss.NewStyle().Foreground(t.TextDim)
+		body.WriteString(tsStyle.Render("Updated " + a.subData.FetchedAt.Format("3:04 PM")))
+	}
+
+	title := "Subscription"
+	if a.subData.Org.Name != "" {
+		title = "Subscription — " + a.subData.Org.Name
+	}
+
+	return components.ContentCard(title, body.String(), cw) + "\n"
+}

internal/tui/tab_overview.go

@@ -0,0 +1,260 @@
+package tui
+
+import (
+	"fmt"
+	"strings"
+	"time"
+
+	"cburn/internal/cli"
+	"cburn/internal/pipeline"
+	"cburn/internal/tui/components"
+	"cburn/internal/tui/theme"
+
+	"github.com/charmbracelet/lipgloss"
+)
+
+func (a App) renderOverviewTab(cw int) string {
+	t := theme.Active
+	stats := a.stats
+	prev := a.prevStats
+	days := a.dailyStats
+	models := a.models
+	var b strings.Builder
+
+	// Row 1: Metric cards
+	costDelta := ""
+	if prev.CostPerDay > 0 {
+		costDelta = fmt.Sprintf("%s/day (%s)", cli.FormatCost(stats.CostPerDay), cli.FormatDelta(stats.CostPerDay, prev.CostPerDay))
+	} else {
+		costDelta = cli.FormatCost(stats.CostPerDay) + "/day"
+	}
+
+	sessDelta := ""
+	if prev.SessionsPerDay > 0 {
+		pctChange := (stats.SessionsPerDay - prev.SessionsPerDay) / prev.SessionsPerDay * 100
+		sessDelta = fmt.Sprintf("%.1f/day (%+.0f%%)", stats.SessionsPerDay, pctChange)
+	} else {
+		sessDelta = fmt.Sprintf("%.1f/day", stats.SessionsPerDay)
+	}
+
+	cacheDelta := ""
+	if prev.CacheHitRate > 0 {
+		ppDelta := (stats.CacheHitRate - prev.CacheHitRate) * 100
+		cacheDelta = fmt.Sprintf("saved %s (%+.1fpp)", cli.FormatCost(stats.CacheSavings), ppDelta)
+	} else {
+		cacheDelta = "saved " + cli.FormatCost(stats.CacheSavings)
+	}
+
+	cards := []struct{ Label, Value, Delta string }{
+		{"Tokens", cli.FormatTokens(stats.TotalBilledTokens), cli.FormatTokens(stats.TokensPerDay) + "/day"},
+		{"Sessions", cli.FormatNumber(int64(stats.TotalSessions)), sessDelta},
+		{"Cost", cli.FormatCost(stats.EstimatedCost), costDelta},
+		{"Cache", cli.FormatPercent(stats.CacheHitRate), cacheDelta},
+	}
+	b.WriteString(components.MetricCardRow(cards, cw))
+	b.WriteString("\n")
+
+	// Row 2: Daily token usage chart
+	if len(days) > 0 {
+		chartVals := make([]float64, len(days))
+		chartLabels := chartDateLabels(days)
+		for i, d := range days {
+			chartVals[len(days)-1-i] = float64(d.InputTokens + d.OutputTokens + d.CacheCreation5m + d.CacheCreation1h)
+		}
+		chartInnerW := components.CardInnerWidth(cw)
+		b.WriteString(components.ContentCard(
+			fmt.Sprintf("Daily Token Usage (%dd)", a.days),
+			components.BarChart(chartVals, chartLabels, t.Blue, chartInnerW, 10),
+			cw,
+		))
+		b.WriteString("\n")
+	}
+
+	// Row 2.5: Live Activity (Today + Last Hour)
+	liveHalves := components.LayoutRow(cw, 2)
+	liveChartH := 8
+	if a.isCompactLayout() {
+		liveChartH = 6
+	}
+
+	// Left: Today's hourly activity
+	var todayCard string
+	if len(a.todayHourly) > 0 {
+		hourVals := make([]float64, 24)
+		var todayTotal int64
+		for i, h := range a.todayHourly {
+			hourVals[i] = float64(h.Tokens)
+			todayTotal += h.Tokens
+		}
+		todayCard = components.ContentCard(
+			fmt.Sprintf("Today (%s)", cli.FormatTokens(todayTotal)),
+			components.BarChart(hourVals, hourLabels24(), t.Blue, components.CardInnerWidth(liveHalves[0]), liveChartH),
+			liveHalves[0],
+		)
+	}
+
+	// Right: Last hour's 5-minute activity
+	var lastHourCard string
+	if len(a.lastHour) > 0 {
+		minVals := make([]float64, 12)
+		var hourTotal int64
+		for i, m := range a.lastHour {
+			minVals[i] = float64(m.Tokens)
+			hourTotal += m.Tokens
+		}
+		lastHourCard = components.ContentCard(
+			fmt.Sprintf("Last Hour (%s)", cli.FormatTokens(hourTotal)),
+			components.BarChart(minVals, minuteLabels(), t.Accent, components.CardInnerWidth(liveHalves[1]), liveChartH),
+			liveHalves[1],
+		)
+	}
+
+	if a.isCompactLayout() {
+		if todayCard != "" {
+			b.WriteString(todayCard)
+			b.WriteString("\n")
+		}
+		if lastHourCard != "" {
+			b.WriteString(lastHourCard)
+			b.WriteString("\n")
+		}
+	} else {
+		b.WriteString(components.CardRow([]string{todayCard, lastHourCard}))
+		b.WriteString("\n")
+	}
+
+	// Row 3: Model Split + Activity Patterns
+	halves := components.LayoutRow(cw, 2)
+	innerW := components.CardInnerWidth(halves[0])
+
+	nameStyle := lipgloss.NewStyle().Foreground(t.TextPrimary)
+	barStyle := lipgloss.NewStyle().Foreground(t.Accent)
+	pctStyle := lipgloss.NewStyle().Foreground(t.TextDim)
+
+	var modelBody strings.Builder
+	limit := 5
+	if len(models) < limit {
+		limit = len(models)
+	}
+	maxShare := 0.0
+	for _, ms := range models[:limit] {
+		if ms.SharePercent > maxShare {
+			maxShare = ms.SharePercent
+		}
+	}
+	nameW := innerW / 3
+	if nameW < 10 {
+		nameW = 10
+	}
+	barMaxLen := innerW - nameW - 8
+	if barMaxLen < 1 {
+		barMaxLen = 1
+	}
+	for _, ms := range models[:limit] {
+		barLen := 0
+		if maxShare > 0 {
+			barLen = int(ms.SharePercent / maxShare * float64(barMaxLen))
+		}
+		fmt.Fprintf(&modelBody, "%s %s %s\n",
+			nameStyle.Render(fmt.Sprintf("%-*s", nameW, shortModel(ms.Model))),
+			barStyle.Render(strings.Repeat("█", barLen)),
+			pctStyle.Render(fmt.Sprintf("%.0f%%", ms.SharePercent)))
+	}
+
+	// Compact activity: aggregate prompts into 4-hour buckets
+	now := time.Now()
+	since := now.AddDate(0, 0, -a.days)
+	hours := pipeline.AggregateHourly(a.filtered, since, now)
+
+	type actBucket struct {
+		label string
+		total int
+		color lipgloss.Color
+	}
+	buckets := []actBucket{
+		{"Night   00-03", 0, t.Red},
+		{"Early   04-07", 0, t.Yellow},
+		{"Morning 08-11", 0, t.Green},
+		{"Midday  12-15", 0, t.Green},
+		{"Evening 16-19", 0, t.Green},
+		{"Late    20-23", 0, t.Yellow},
+	}
+	for _, h := range hours {
+		idx := h.Hour / 4
+		if idx >= 6 {
+			idx = 5
+		}
+		buckets[idx].total += h.Prompts
+	}
+
+	maxBucket := 0
+	for _, bk := range buckets {
+		if bk.total > maxBucket {
+			maxBucket = bk.total
+		}
+	}
+
+	actInnerW := components.CardInnerWidth(halves[1])
+
+	// Compute number column width from actual data so bars never overflow.
+	maxNumW := 5
+	for _, bk := range buckets {
+		if nw := len(cli.FormatNumber(int64(bk.total))); nw > maxNumW {
+			maxNumW = nw
+		}
+	}
+	// prefix = 13 (label) + 1 (space) + maxNumW (number) + 1 (space)
+	actBarMax := actInnerW - 15 - maxNumW
+	if actBarMax < 1 {
+		actBarMax = 1
+	}
+
+	numStyle := lipgloss.NewStyle().Foreground(t.TextMuted)
+	var actBody strings.Builder
+	for _, bk := range buckets {
+		bl := 0
+		if maxBucket > 0 {
+			bl = bk.total * actBarMax / maxBucket
+		}
+		bar := lipgloss.NewStyle().Foreground(bk.color).Render(strings.Repeat("█", bl))
+		fmt.Fprintf(&actBody, "%s %s %s\n",
+			numStyle.Render(bk.label),
+			numStyle.Render(fmt.Sprintf("%*s", maxNumW, cli.FormatNumber(int64(bk.total)))),
+			bar)
+	}
+
+	modelCard := components.ContentCard("Model Split", modelBody.String(), halves[0])
+	actCard := components.ContentCard("Activity", actBody.String(), halves[1])
+	if a.isCompactLayout() {
+		b.WriteString(components.ContentCard("Model Split", modelBody.String(), cw))
+		b.WriteString("\n")
+		b.WriteString(components.ContentCard("Activity", actBody.String(), cw))
+	} else {
+		b.WriteString(components.CardRow([]string{modelCard, actCard}))
+	}
+
+	return b.String()
+}
+
+// hourLabels24 returns X-axis labels for 24 hourly buckets (one per hour).
+func hourLabels24() []string {
+	labels := make([]string, 24)
+	for i := 0; i < 24; i++ {
+		h := i % 12
+		if h == 0 {
+			h = 12
+		}
+		suffix := "a"
+		if i >= 12 {
+			suffix = "p"
+		}
+		labels[i] = fmt.Sprintf("%d%s", h, suffix)
+	}
+	return labels
+}
+
+// minuteLabels returns X-axis labels for 12 five-minute buckets (one per bucket).
+// Bucket 0 is oldest (55-60 min ago), bucket 11 is newest (0-5 min ago).
+func minuteLabels() []string {
+	return []string{"-55", "-50", "-45", "-40", "-35", "-30", "-25", "-20", "-15", "-10", "-5", "now"}
+}

internal/tui/tab_sessions.go

@@ -11,6 +11,7 @@ import (
 	"cburn/internal/tui/components"
 	"cburn/internal/tui/theme"
 
+	"github.com/charmbracelet/bubbles/textinput"
 	"github.com/charmbracelet/lipgloss"
 )
 
@@ -22,9 +23,53 @@ const (
 
 // sessionsState holds the sessions tab state.
 type sessionsState struct {
-	cursor   int
+	cursor       int
-	viewMode int
+	viewMode     int
-	offset   int // scroll offset for the list
+	offset       int // scroll offset for the list
+	detailScroll int // scroll offset for the detail pane
+
+	// Search/filter state
+	searching   bool            // true when search input is active
+	searchInput textinput.Model // the search text input
+	searchQuery string          // the applied search filter
+}
+
+// newSearchInput creates a configured text input for session search.
+func newSearchInput() textinput.Model {
+	ti := textinput.New()
+	ti.Placeholder = "search by project, cost, tokens..."
+	ti.CharLimit = 100
+	ti.Width = 40
+	return ti
+}
+
+// filterSessionsBySearch returns sessions matching the search query.
+// Matches against project name and formats cost/tokens for numeric searches.
+func filterSessionsBySearch(sessions []model.SessionStats, query string) []model.SessionStats {
+	if query == "" {
+		return sessions
+	}
+	query = strings.ToLower(query)
+	var result []model.SessionStats
+	for _, s := range sessions {
+		// Match project name
+		if strings.Contains(strings.ToLower(s.Project), query) {
+			result = append(result, s)
+			continue
+		}
+		// Match session ID prefix
+		if strings.Contains(strings.ToLower(s.SessionID), query) {
+			result = append(result, s)
+			continue
+		}
+		// Match cost (e.g., "$0.50" or "0.5")
+		costStr := cli.FormatCost(s.EstimatedCost)
+		if strings.Contains(strings.ToLower(costStr), query) {
+			result = append(result, s)
+			continue
+		}
+	}
+	return result
 }
 
 func (a App) renderSessionsContent(filtered []model.SessionStats, cw, h int) string {
@@ -35,6 +80,11 @@ func (a App) renderSessionsContent(filtered []model.SessionStats, cw, h int) str
 		return components.ContentCard("Sessions", lipgloss.NewStyle().Foreground(t.TextMuted).Render("No sessions found"), cw)
 	}
 
+	// Force single-pane detail mode in compact layouts.
+	if cw < compactWidth {
+		return a.renderSessionDetail(filtered, cw, h)
+	}
+
 	switch ss.viewMode {
 	case sessViewDetail:
 		return a.renderSessionDetail(filtered, cw, h)
@@ -51,9 +101,17 @@ func (a App) renderSessionsSplit(sessions []model.SessionStats, cw, h int) strin
 		return ""
 	}
 
-	leftW := cw / 3
+	leftW := cw / 4
-	if leftW < 30 {
+	if leftW < 36 {
-		leftW = 30
+		leftW = 36
+	}
+	minRightW := 50
+	maxLeftW := cw - minRightW
+	if maxLeftW < 20 {
+		return a.renderSessionDetail(sessions, cw, h)
+	}
+	if leftW > maxLeftW {
+		leftW = maxLeftW
 	}
 	rightW := cw - leftW
 
@@ -91,27 +149,42 @@ func (a App) renderSessionsSplit(sessions []model.SessionStats, cw, h int) strin
 			startStr = s.StartTime.Local().Format("Jan 02 15:04")
 		}
 		dur := cli.FormatDuration(s.DurationSecs)
+		costStr := cli.FormatCost(s.EstimatedCost)
 
-		line := fmt.Sprintf("%-13s %s", startStr, dur)
+		// Build left portion (date + duration) and right-align cost
-		if len(line) > leftInner {
+		leftPart := fmt.Sprintf("%-13s %s", startStr, dur)
-			line = line[:leftInner]
+		padN := leftInner - len(leftPart) - len(costStr)
+		if padN < 1 {
+			padN = 1
 		}
 
 		if i == ss.cursor {
-			leftBody.WriteString(selectedStyle.Render(line))
+			fullLine := leftPart + strings.Repeat(" ", padN) + costStr
+			// Pad to full width for continuous highlight background
+			if len(fullLine) < leftInner {
+				fullLine += strings.Repeat(" ", leftInner-len(fullLine))
+			}
+			leftBody.WriteString(selectedStyle.Render(fullLine))
 		} else {
-			leftBody.WriteString(rowStyle.Render(line))
+			leftBody.WriteString(
+				mutedStyle.Render(fmt.Sprintf("%-13s", startStr)) + " " +
+					rowStyle.Render(dur) +
+					strings.Repeat(" ", padN) +
+					mutedStyle.Render(costStr))
 		}
 		leftBody.WriteString("\n")
 	}
 
 	leftCard := components.ContentCard(fmt.Sprintf("Sessions [%dd]", a.days), leftBody.String(), leftW)
 
-	// Right pane: full session detail
+	// Right pane: full session detail with scroll support
 	sel := sessions[ss.cursor]
 	rightBody := a.renderDetailBody(sel, rightW, headerStyle, mutedStyle)
 
-	titleStr := fmt.Sprintf("Session %s", shortID(sel.SessionID))
+	// Apply detail scroll offset
+	rightBody = a.applyDetailScroll(rightBody, h-4) // card border (2) + title (1) + gap (1)
+
+	titleStr := "Session " + shortID(sel.SessionID)
 	rightCard := components.ContentCard(titleStr, rightBody, rightW)
 
 	return components.CardRow([]string{leftCard, rightCard})
@@ -130,8 +203,9 @@ func (a App) renderSessionDetail(sessions []model.SessionStats, cw, h int) strin
 	mutedStyle := lipgloss.NewStyle().Foreground(t.TextMuted)
 
 	body := a.renderDetailBody(sel, cw, headerStyle, mutedStyle)
+	body = a.applyDetailScroll(body, h-4)
 
-	title := fmt.Sprintf("Session %s", shortID(sel.SessionID))
+	title := "Session " + shortID(sel.SessionID)
 	return components.ContentCard(title, body, cw)
 }
 
@@ -159,27 +233,28 @@ func (a App) renderDetailBody(sel model.SessionStats, w int, headerStyle, mutedS
 			timeStr += " - " + sel.EndTime.Local().Format("15:04:05")
 		}
 		timeStr += " " + sel.StartTime.Local().Format("MST")
-		body.WriteString(fmt.Sprintf("%s %s (%s)\n",
+		fmt.Fprintf(&body, "%s %s (%s)\n",
 			labelStyle.Render("Duration:"),
 			valueStyle.Render(durStr),
-			mutedStyle.Render(timeStr)))
+			mutedStyle.Render(timeStr))
 	}
 
 	ratio := 0.0
 	if sel.UserMessages > 0 {
 		ratio = float64(sel.APICalls) / float64(sel.UserMessages)
 	}
-	body.WriteString(fmt.Sprintf("%s %s    %s %s    %s %.1fx\n\n",
+	fmt.Fprintf(&body, "%s %s    %s %s    %s %.1fx\n\n",
 		labelStyle.Render("Prompts:"), valueStyle.Render(cli.FormatNumber(int64(sel.UserMessages))),
 		labelStyle.Render("API Calls:"), valueStyle.Render(cli.FormatNumber(int64(sel.APICalls))),
-		labelStyle.Render("Ratio:"), ratio))
+		labelStyle.Render("Ratio:"), ratio)
 
 	// Token breakdown table
 	body.WriteString(headerStyle.Render("TOKEN BREAKDOWN"))
 	body.WriteString("\n")
-	body.WriteString(headerStyle.Render(fmt.Sprintf("%-20s %12s %10s", "Type", "Tokens", "Cost")))
+	typeW, tokW, costW, tableW := tokenTableLayout(innerW)
+	body.WriteString(headerStyle.Render(fmt.Sprintf("%-*s %*s %*s", typeW, "Type", tokW, "Tokens", costW, "Cost")))
 	body.WriteString("\n")
-	body.WriteString(mutedStyle.Render(strings.Repeat("─", 44)))
+	body.WriteString(mutedStyle.Render(strings.Repeat("─", tableW)))
 	body.WriteString("\n")
 
 	// Calculate per-type costs (aggregate across models)
@@ -218,32 +293,53 @@ func (a App) renderDetailBody(sel model.SessionStats, w int, headerStyle, mutedS
 		if r.tokens == 0 {
 			continue
 		}
-		body.WriteString(valueStyle.Render(fmt.Sprintf("%-20s %12s %10s",
+		body.WriteString(valueStyle.Render(fmt.Sprintf("%-*s %*s %*s",
-			r.typ,
+			typeW,
+			truncStr(r.typ, typeW),
+			tokW,
 			cli.FormatTokens(r.tokens),
+			costW,
 			cli.FormatCost(r.cost))))
 		body.WriteString("\n")
 	}
 
-	body.WriteString(mutedStyle.Render(strings.Repeat("─", 44)))
+	body.WriteString(mutedStyle.Render(strings.Repeat("─", tableW)))
 	body.WriteString("\n")
-	body.WriteString(fmt.Sprintf("%-20s %12s %10s\n",
+	fmt.Fprintf(&body, "%-*s %*s %*s\n",
+		typeW,
 		valueStyle.Render("Net Cost"),
+		tokW,
 		"",
-		greenStyle.Render(cli.FormatCost(sel.EstimatedCost))))
+		costW,
-	body.WriteString(fmt.Sprintf("%-20s %12s %10s\n",
+		greenStyle.Render(cli.FormatCost(sel.EstimatedCost)))
+	fmt.Fprintf(&body, "%-*s %*s %*s\n",
+		typeW,
 		labelStyle.Render("Cache Savings"),
+		tokW,
 		"",
-		greenStyle.Render(cli.FormatCost(savings))))
+		costW,
+		greenStyle.Render(cli.FormatCost(savings)))
 
 	// Model breakdown
 	if len(sel.Models) > 0 {
 		body.WriteString("\n")
 		body.WriteString(headerStyle.Render("API CALLS BY MODEL"))
 		body.WriteString("\n")
-		body.WriteString(headerStyle.Render(fmt.Sprintf("%-14s %7s %10s %10s %8s", "Model", "Calls", "Input", "Output", "Cost")))
+		compactModelTable := innerW < 60
-		body.WriteString("\n")
+		if compactModelTable {
-		body.WriteString(mutedStyle.Render(strings.Repeat("─", 52)))
+			modelW := innerW - 7 - 1 - 8
+			if modelW < 8 {
+				modelW = 8
+			}
+			body.WriteString(headerStyle.Render(fmt.Sprintf("%-*s %7s %8s", modelW, "Model", "Calls", "Cost")))
+			body.WriteString("\n")
+			body.WriteString(mutedStyle.Render(strings.Repeat("─", modelW+7+8+2)))
+		} else {
+			modelW := 14
+			body.WriteString(headerStyle.Render(fmt.Sprintf("%-*s %7s %10s %10s %8s", modelW, "Model", "Calls", "Input", "Output", "Cost")))
+			body.WriteString("\n")
+			body.WriteString(mutedStyle.Render(strings.Repeat("─", modelW+7+10+10+8+4)))
+		}
 		body.WriteString("\n")
 
 		// Sort model names for deterministic display order
@@ -255,12 +351,26 @@ func (a App) renderDetailBody(sel model.SessionStats, w int, headerStyle, mutedS
 
 		for _, modelName := range modelNames {
 			mu := sel.Models[modelName]
-			body.WriteString(valueStyle.Render(fmt.Sprintf("%-14s %7s %10s %10s %8s",
+			if innerW < 60 {
-				shortModel(modelName),
+				modelW := innerW - 7 - 1 - 8
-				cli.FormatNumber(int64(mu.APICalls)),
+				if modelW < 8 {
-				cli.FormatTokens(mu.InputTokens),
+					modelW = 8
-				cli.FormatTokens(mu.OutputTokens),
+				}
-				cli.FormatCost(mu.EstimatedCost))))
+				body.WriteString(valueStyle.Render(fmt.Sprintf("%-*s %7s %8s",
+					modelW,
+					truncStr(shortModel(modelName), modelW),
+					cli.FormatNumber(int64(mu.APICalls)),
+					cli.FormatCost(mu.EstimatedCost))))
+			} else {
+				modelW := 14
+				body.WriteString(valueStyle.Render(fmt.Sprintf("%-*s %7s %10s %10s %8s",
+					modelW,
+					truncStr(shortModel(modelName), modelW),
+					cli.FormatNumber(int64(mu.APICalls)),
+					cli.FormatTokens(mu.InputTokens),
+					cli.FormatTokens(mu.OutputTokens),
+					cli.FormatCost(mu.EstimatedCost))))
+			}
 			body.WriteString("\n")
 		}
 	}
@@ -271,8 +381,57 @@ func (a App) renderDetailBody(sel model.SessionStats, w int, headerStyle, mutedS
 		body.WriteString("\n")
 	}
 
+	// Subagent drill-down
+	if subs := a.subagentMap[sel.SessionID]; len(subs) > 0 {
+		body.WriteString("\n")
+		body.WriteString(headerStyle.Render(fmt.Sprintf("SUBAGENTS (%d)", len(subs))))
+		body.WriteString("\n")
+
+		nameW := innerW - 8 - 10 - 2
+		if nameW < 10 {
+			nameW = 10
+		}
+		body.WriteString(headerStyle.Render(fmt.Sprintf("%-*s %8s %10s", nameW, "Agent", "Duration", "Cost")))
+		body.WriteString("\n")
+		body.WriteString(mutedStyle.Render(strings.Repeat("─", nameW+8+10+2)))
+		body.WriteString("\n")
+
+		var totalSubCost float64
+		var totalSubDur int64
+		for _, sub := range subs {
+			// Extract short agent name from session ID (e.g., "uuid/agent-acompact-7b10e8" -> "acompact-7b10e8")
+			agentName := sub.SessionID
+			if idx := strings.LastIndex(agentName, "/"); idx >= 0 {
+				agentName = agentName[idx+1:]
+			}
+			agentName = strings.TrimPrefix(agentName, "agent-")
+
+			body.WriteString(valueStyle.Render(fmt.Sprintf("%-*s %8s %10s",
+				nameW,
+				truncStr(agentName, nameW),
+				cli.FormatDuration(sub.DurationSecs),
+				cli.FormatCost(sub.EstimatedCost))))
+			body.WriteString("\n")
+			totalSubCost += sub.EstimatedCost
+			totalSubDur += sub.DurationSecs
+		}
+
+		body.WriteString(mutedStyle.Render(strings.Repeat("─", nameW+8+10+2)))
+		body.WriteString("\n")
+		body.WriteString(valueStyle.Render(fmt.Sprintf("%-*s %8s %10s",
+			nameW,
+			"Combined",
+			cli.FormatDuration(totalSubDur),
+			cli.FormatCost(totalSubCost))))
+		body.WriteString("\n")
+	}
+
 	body.WriteString("\n")
-	body.WriteString(mutedStyle.Render("[Enter] expand  [j/k] navigate  [q] quit"))
+	if w < compactWidth {
+		body.WriteString(mutedStyle.Render("[j/k] navigate  [J/K] scroll  [q] quit"))
+	} else {
+		body.WriteString(mutedStyle.Render("[Enter] expand  [j/k] navigate  [J/K/^d/^u] scroll  [q] quit"))
+	}
 
 	return body.String()
 }
@@ -283,3 +442,60 @@ func shortID(id string) string {
 	}
 	return id
 }
+
+// applyDetailScroll applies the detail pane scroll offset to a rendered body string.
+// visibleH is the number of lines that fit in the card body area.
+func (a App) applyDetailScroll(body string, visibleH int) string {
+	if visibleH < 5 {
+		visibleH = 5
+	}
+
+	lines := strings.Split(body, "\n")
+	if len(lines) <= visibleH {
+		return body
+	}
+
+	scrollOff := a.sessState.detailScroll
+	maxScroll := len(lines) - visibleH
+	if maxScroll < 0 {
+		maxScroll = 0
+	}
+	if scrollOff > maxScroll {
+		scrollOff = maxScroll
+	}
+	if scrollOff < 0 {
+		scrollOff = 0
+	}
+
+	endIdx := scrollOff + visibleH
+	if endIdx > len(lines) {
+		endIdx = len(lines)
+	}
+	visible := lines[scrollOff:endIdx]
+
+	// Add scroll indicator if content continues below.
+	// Count includes the line we're replacing + lines past the viewport.
+	if endIdx < len(lines) {
+		unseen := len(lines) - endIdx + 1
+		dimStyle := lipgloss.NewStyle().Foreground(theme.Active.TextDim)
+		visible[len(visible)-1] = dimStyle.Render(fmt.Sprintf("... %d more", unseen))
+	}
+
+	return strings.Join(visible, "\n")
+}
+
+func tokenTableLayout(innerW int) (typeW, tokenW, costW, tableW int) {
+	tokenW = 12
+	costW = 10
+	typeW = innerW - tokenW - costW - 2
+	if typeW < 8 {
+		tokenW = 8
+		costW = 8
+		typeW = innerW - tokenW - costW - 2
+	}
+	if typeW < 6 {
+		typeW = 6
+	}
+	tableW = typeW + tokenW + costW + 2
+	return
+}

internal/tui/tab_settings.go

@@ -2,7 +2,9 @@ package tui
 
 import (
 	"fmt"
+	"strconv"
 	"strings"
+	"time"
 
 	"cburn/internal/cli"
 	"cburn/internal/config"
@@ -16,9 +18,12 @@ import (
 
 const (
 	settingsFieldAPIKey = iota
+	settingsFieldSessionKey
 	settingsFieldTheme
 	settingsFieldDays
 	settingsFieldBudget
+	settingsFieldAutoRefresh
+	settingsFieldRefreshInterval
 	settingsFieldCount // sentinel
 )
 
@@ -56,13 +61,21 @@ func (a App) settingsStartEdit() (tea.Model, tea.Cmd) {
 		if existing != "" {
 			ti.SetValue(existing)
 		}
+	case settingsFieldSessionKey:
+		ti.Placeholder = "sk-ant-sid..."
+		ti.EchoMode = textinput.EchoPassword
+		ti.EchoCharacter = '*'
+		existing := config.GetSessionKey(cfg)
+		if existing != "" {
+			ti.SetValue(existing)
+		}
 	case settingsFieldTheme:
 		ti.Placeholder = "flexoki-dark, catppuccin-mocha, tokyo-night, terminal"
 		ti.SetValue(cfg.Appearance.Theme)
 		ti.EchoMode = textinput.EchoNormal
 	case settingsFieldDays:
 		ti.Placeholder = "30"
-		ti.SetValue(fmt.Sprintf("%d", cfg.General.DefaultDays))
+		ti.SetValue(strconv.Itoa(cfg.General.DefaultDays))
 		ti.EchoMode = textinput.EchoNormal
 	case settingsFieldBudget:
 		ti.Placeholder = "500 (monthly USD, leave empty to clear)"
@@ -70,6 +83,19 @@ func (a App) settingsStartEdit() (tea.Model, tea.Cmd) {
 			ti.SetValue(fmt.Sprintf("%.0f", *cfg.Budget.MonthlyUSD))
 		}
 		ti.EchoMode = textinput.EchoNormal
+	case settingsFieldAutoRefresh:
+		ti.Placeholder = "true or false"
+		ti.SetValue(strconv.FormatBool(a.autoRefresh))
+		ti.EchoMode = textinput.EchoNormal
+	case settingsFieldRefreshInterval:
+		ti.Placeholder = "30 (seconds, minimum 10)"
+		// Use effective value from App state to match display
+		intervalSec := int(a.refreshInterval.Seconds())
+		if intervalSec < 10 {
+			intervalSec = 30
+		}
+		ti.SetValue(strconv.Itoa(intervalSec))
+		ti.EchoMode = textinput.EchoNormal
 	}
 
 	ti.Focus()
@@ -103,6 +129,8 @@ func (a *App) settingsSave() {
 	switch a.settings.cursor {
 	case settingsFieldAPIKey:
 		cfg.AdminAPI.APIKey = val
+	case settingsFieldSessionKey:
+		cfg.ClaudeAI.SessionKey = val
 	case settingsFieldTheme:
 		// Validate theme name
 		found := false
@@ -132,6 +160,15 @@ func (a *App) settingsSave() {
 				cfg.Budget.MonthlyUSD = &b
 			}
 		}
+	case settingsFieldAutoRefresh:
+		cfg.TUI.AutoRefresh = val == "true" || val == "1" || val == "yes"
+		a.autoRefresh = cfg.TUI.AutoRefresh
+	case settingsFieldRefreshInterval:
+		var interval int
+		if _, err := fmt.Sscanf(val, "%d", &interval); err == nil && interval >= 10 {
+			cfg.TUI.RefreshIntervalSec = interval
+			a.refreshInterval = time.Duration(interval) * time.Second
+		}
 	}
 
 	a.settings.saveErr = config.Save(cfg)
@@ -162,16 +199,36 @@ func (a App) renderSettingsTab(cw int) string {
 		}
 	}
 
+	sessionKeyDisplay := "(not set)"
+	existingSession := config.GetSessionKey(cfg)
+	if existingSession != "" {
+		if len(existingSession) > 16 {
+			sessionKeyDisplay = existingSession[:12] + "..." + existingSession[len(existingSession)-4:]
+		} else {
+			sessionKeyDisplay = "****"
+		}
+	}
+
+	// Use live App state for TUI-specific settings (auto-refresh, interval)
+	// to ensure display matches actual behavior after R toggle
+	refreshIntervalSec := int(a.refreshInterval.Seconds())
+	if refreshIntervalSec < 10 {
+		refreshIntervalSec = 30 // match the effective default
+	}
+
 	fields := []field{
 		{"Admin API Key", apiKeyDisplay},
+		{"Session Key", sessionKeyDisplay},
 		{"Theme", cfg.Appearance.Theme},
-		{"Default Days", fmt.Sprintf("%d", cfg.General.DefaultDays)},
+		{"Default Days", strconv.Itoa(cfg.General.DefaultDays)},
 		{"Monthly Budget", func() string {
 			if cfg.Budget.MonthlyUSD != nil {
 				return fmt.Sprintf("$%.0f", *cfg.Budget.MonthlyUSD)
 			}
 			return "(not set)"
 		}()},
+		{"Auto Refresh", strconv.FormatBool(a.autoRefresh)},
+		{"Refresh Interval", fmt.Sprintf("%ds", refreshIntervalSec)},
 	}
 
 	var formBody strings.Builder
@@ -210,7 +267,7 @@ func (a App) renderSettingsTab(cw int) string {
 	infoBody.WriteString(labelStyle.Render("Data directory:  ") + valueStyle.Render(a.claudeDir) + "\n")
 	infoBody.WriteString(labelStyle.Render("Sessions loaded: ") + valueStyle.Render(cli.FormatNumber(int64(len(a.sessions)))) + "\n")
 	infoBody.WriteString(labelStyle.Render("Load time:       ") + valueStyle.Render(fmt.Sprintf("%.1fs", a.loadTime.Seconds())) + "\n")
-	infoBody.WriteString(labelStyle.Render("Config file:     ") + valueStyle.Render(config.ConfigPath()))
+	infoBody.WriteString(labelStyle.Render("Config file:     ") + valueStyle.Render(config.Path()))
 
 	var b strings.Builder
 	b.WriteString(components.ContentCard("Settings", formBody.String(), cw))

internal/tui/theme/theme.go

@@ -1,3 +1,4 @@
+// Package theme defines color themes for the cburn TUI dashboard.
 package theme
 
 import "github.com/charmbracelet/lipgloss"
@@ -8,7 +9,6 @@ type Theme struct {
 	Background  lipgloss.Color
 	Surface     lipgloss.Color
 	Border      lipgloss.Color
-	BorderHover lipgloss.Color
 	TextDim     lipgloss.Color
 	TextMuted   lipgloss.Color
 	TextPrimary lipgloss.Color
@@ -17,7 +17,6 @@ type Theme struct {
 	Orange      lipgloss.Color
 	Red         lipgloss.Color
 	Blue        lipgloss.Color
-	Purple      lipgloss.Color
 	Yellow      lipgloss.Color
 }
 
@@ -30,7 +29,6 @@ var FlexokiDark = Theme{
 	Background:  lipgloss.Color("#100F0F"),
 	Surface:     lipgloss.Color("#1C1B1A"),
 	Border:      lipgloss.Color("#282726"),
-	BorderHover: lipgloss.Color("#343331"),
 	TextDim:     lipgloss.Color("#575653"),
 	TextMuted:   lipgloss.Color("#6F6E69"),
 	TextPrimary: lipgloss.Color("#FFFCF0"),
@@ -39,7 +37,6 @@ var FlexokiDark = Theme{
 	Orange:      lipgloss.Color("#DA702C"),
 	Red:         lipgloss.Color("#D14D41"),
 	Blue:        lipgloss.Color("#4385BE"),
-	Purple:      lipgloss.Color("#8B7EC8"),
 	Yellow:      lipgloss.Color("#D0A215"),
 }
 
@@ -49,7 +46,6 @@ var CatppuccinMocha = Theme{
 	Background:  lipgloss.Color("#1E1E2E"),
 	Surface:     lipgloss.Color("#313244"),
 	Border:      lipgloss.Color("#45475A"),
-	BorderHover: lipgloss.Color("#585B70"),
 	TextDim:     lipgloss.Color("#6C7086"),
 	TextMuted:   lipgloss.Color("#A6ADC8"),
 	TextPrimary: lipgloss.Color("#CDD6F4"),
@@ -58,7 +54,6 @@ var CatppuccinMocha = Theme{
 	Orange:      lipgloss.Color("#FAB387"),
 	Red:         lipgloss.Color("#F38BA8"),
 	Blue:        lipgloss.Color("#89B4FA"),
-	Purple:      lipgloss.Color("#CBA6F7"),
 	Yellow:      lipgloss.Color("#F9E2AF"),
 }
 
@@ -68,7 +63,6 @@ var TokyoNight = Theme{
 	Background:  lipgloss.Color("#1A1B26"),
 	Surface:     lipgloss.Color("#24283B"),
 	Border:      lipgloss.Color("#414868"),
-	BorderHover: lipgloss.Color("#565F89"),
 	TextDim:     lipgloss.Color("#565F89"),
 	TextMuted:   lipgloss.Color("#A9B1D6"),
 	TextPrimary: lipgloss.Color("#C0CAF5"),
@@ -77,7 +71,6 @@ var TokyoNight = Theme{
 	Orange:      lipgloss.Color("#FF9E64"),
 	Red:         lipgloss.Color("#F7768E"),
 	Blue:        lipgloss.Color("#7AA2F7"),
-	Purple:      lipgloss.Color("#BB9AF7"),
 	Yellow:      lipgloss.Color("#E0AF68"),
 }
 
@@ -87,7 +80,6 @@ var Terminal = Theme{
 	Background:  lipgloss.Color("0"),
 	Surface:     lipgloss.Color("0"),
 	Border:      lipgloss.Color("8"),
-	BorderHover: lipgloss.Color("7"),
 	TextDim:     lipgloss.Color("8"),
 	TextMuted:   lipgloss.Color("7"),
 	TextPrimary: lipgloss.Color("15"),
@@ -96,7 +88,6 @@ var Terminal = Theme{
 	Orange:      lipgloss.Color("3"),
 	Red:         lipgloss.Color("1"),
 	Blue:        lipgloss.Color("4"),
-	Purple:      lipgloss.Color("5"),
 	Yellow:      lipgloss.Color("3"),
 }