feat: add root TUI app model with 10-tab dashboard and async data loading

Add the core App Bubble Tea model that orchestrates the entire TUI
dashboard. The model manages:

- 10 navigable tabs: Dashboard, Costs, Sessions, Models, Projects,
  Trends, Efficiency, Activity, Budget, and Settings. Each tab is
  accessible via single-key shortcuts (d/c/s/m/p/t/e/a/b/x) or
  left/right arrows for sequential navigation.

- Async data pipeline: launches the JSONL loader in a goroutine and
  receives progress updates via a channel subscription, displaying
  an animated loading screen with a spinner and file count. Data
  loads once on startup and recomputes aggregates when filters change.

- Filter state: supports configurable time range (7/30/90 days),
  project filter, and model filter. Changing any filter triggers
  recomputation of all derived stats (summary, daily, model, project
  breakdowns) including a comparison period for delta calculations.

- First-run detection: if no config file exists when data finishes
  loading, automatically enters the setup wizard flow before showing
  the dashboard.

- Tab-specific rendering: Dashboard shows metric cards with period-
  over-period deltas, daily token/cost bar charts, model pie-style
  breakdown, and top projects. Costs shows a per-model cost table.
  Trends renders daily tokens, cost, and session bar charts.
  Efficiency shows cache hit rate and savings metrics. Activity
  renders an hourly heatmap. Budget tracks spend against plan limits
  with a burn-rate projection chart.

- Help overlay: toggleable help panel listing all keyboard shortcuts,
  rendered as a centered overlay above the active tab content.
This commit is contained in:
teernisse
2026-02-19 15:01:47 -05:00
parent b69b24c107
commit a04a0065a0

1157
internal/tui/app.go Normal file

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