feat(cli): add GlyphMode icon system, Theme extensions, and progress API

Phase 1 of UX skin overhaul: foundation layer that all subsequent
phases build upon.

Icons: 3-tier glyph system (Nerd Font / Unicode / ASCII) with
auto-detection from TERM_PROGRAM, LORE_ICONS env, or --icons flag.
16 semantic icon methods on Icons struct (success, warning, error,
issue states, MR states, note, search, user, sync, waiting).

Theme: 4 new semantic styles — muted (#6b7280), highlight (#fbbf24),
timing (#94a3b8), state_draft (#6b7280).

Progress: stage_spinner_v2 with icon prefix, nested_progress with
bounded bar/throughput/ETA, finish_stage for static completion lines,
format_elapsed for compact duration strings.

Utilities: format_relative_time_compact (3h, 2d, 1w, 3mo),
format_labels_bare (comma-separated without brackets).

CLI: --icons global flag, GLOBAL_FLAGS registry updated.

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

src/cli/progress.rs

@@ -1,8 +1,11 @@
 use indicatif::{MultiProgress, ProgressBar, ProgressStyle};
 use std::io::Write;
 use std::sync::LazyLock;
+use std::time::Duration;
 use tracing_subscriber::fmt::MakeWriter;
 
+use crate::cli::render::Icons;
+
 static MULTI: LazyLock<MultiProgress> = LazyLock::new(MultiProgress::new);
 
 pub fn multi() -> &'static MultiProgress {
@@ -29,6 +32,71 @@ pub fn stage_spinner(stage: u8, total: u8, msg: &str, robot_mode: bool) -> Progr
     pb
 }
 
+/// Stage spinner with icon prefix and elapsed time on the right.
+///
+/// Template: `{spinner:.cyan} {prefix} {wide_msg} {elapsed_style:.dim}`
+pub fn stage_spinner_v2(icon: &str, label: &str, msg: &str, robot_mode: bool) -> ProgressBar {
+    if robot_mode {
+        return ProgressBar::hidden();
+    }
+    let pb = multi().add(ProgressBar::new_spinner());
+    pb.set_style(
+        ProgressStyle::default_spinner()
+            .template("  {spinner:.cyan} {prefix} {wide_msg}")
+            .expect("valid template"),
+    );
+    pb.enable_steady_tick(Duration::from_millis(60));
+    pb.set_prefix(format!("{icon} {label}"));
+    pb.set_message(msg.to_string());
+    pb
+}
+
+/// Nested progress bar with count, throughput, and ETA.
+///
+/// Template: `    {spinner:.dim} {msg} {bar:30.cyan/dark_gray} {pos}/{len} {per_sec:.dim} {eta:.dim}`
+pub fn nested_progress(msg: &str, len: u64, robot_mode: bool) -> ProgressBar {
+    if robot_mode {
+        return ProgressBar::hidden();
+    }
+    let pb = multi().add(ProgressBar::new(len));
+    pb.set_style(
+        ProgressStyle::default_bar()
+            .template(
+                "  {spinner:.dim} {msg} {bar:30.cyan/dark_gray} {pos}/{len} {per_sec:.dim} {eta:.dim}",
+            )
+            .expect("valid template")
+            .progress_chars(Icons::progress_chars()),
+    );
+    pb.enable_steady_tick(Duration::from_millis(60));
+    pb.set_message(msg.to_string());
+    pb
+}
+
+/// Replace a spinner with a static completion line showing icon, label, summary, and elapsed.
+///
+/// Output: `  ✓ Label  summary  elapsed`
+pub fn finish_stage(pb: &ProgressBar, icon: &str, label: &str, summary: &str, elapsed: Duration) {
+    let elapsed_str = format_elapsed(elapsed);
+    let line = format!("  {icon} {label:<12}{summary:>40}  {elapsed_str:>8}",);
+    pb.set_style(ProgressStyle::with_template("{msg}").expect("valid template"));
+    pb.finish_with_message(line);
+}
+
+/// Format a Duration as a compact human string (e.g. "1.2s", "42ms", "1m 5s").
+fn format_elapsed(d: Duration) -> String {
+    let ms = d.as_millis();
+    if ms < 1000 {
+        format!("{ms}ms")
+    } else if ms < 60_000 {
+        format!("{:.1}s", ms as f64 / 1000.0)
+    } else {
+        let secs = d.as_secs();
+        let m = secs / 60;
+        let s = secs % 60;
+        format!("{m}m {s}s")
+    }
+}
+
 #[derive(Clone)]
 pub struct SuspendingWriter;
 
@@ -116,9 +184,6 @@ mod tests {
 
     #[test]
     fn stage_spinner_human_mode_sets_properties() {
-        // In non-TTY test environments, MultiProgress may report bars as
-        // hidden. Verify the human-mode code path by checking that prefix
-        // and message are configured (robot-mode returns a bare hidden bar).
         let pb = stage_spinner(1, 3, "Testing...", false);
         assert_eq!(pb.prefix(), "[1/3]");
         assert_eq!(pb.message(), "Testing...");
@@ -138,4 +203,52 @@ mod tests {
         assert_eq!(pb.message(), "Seeding timeline...");
         pb.finish_and_clear();
     }
+
+    // ── New progress API tests ──
+
+    #[test]
+    fn stage_spinner_v2_robot_mode_returns_hidden() {
+        let pb = stage_spinner_v2("\u{2714}", "Issues", "fetching...", true);
+        assert!(pb.is_hidden());
+    }
+
+    #[test]
+    fn stage_spinner_v2_human_mode_sets_properties() {
+        let pb = stage_spinner_v2("\u{2714}", "Issues", "fetching...", false);
+        assert!(pb.prefix().contains("Issues"));
+        assert_eq!(pb.message(), "fetching...");
+        pb.finish_and_clear();
+    }
+
+    #[test]
+    fn nested_progress_robot_mode_returns_hidden() {
+        let pb = nested_progress("Embedding...", 100, true);
+        assert!(pb.is_hidden());
+    }
+
+    #[test]
+    fn nested_progress_human_mode_sets_length() {
+        let pb = nested_progress("Embedding...", 100, false);
+        assert_eq!(pb.length(), Some(100));
+        assert_eq!(pb.message(), "Embedding...");
+        pb.finish_and_clear();
+    }
+
+    #[test]
+    fn format_elapsed_sub_second() {
+        assert_eq!(format_elapsed(Duration::from_millis(42)), "42ms");
+        assert_eq!(format_elapsed(Duration::from_millis(999)), "999ms");
+    }
+
+    #[test]
+    fn format_elapsed_seconds() {
+        assert_eq!(format_elapsed(Duration::from_millis(1200)), "1.2s");
+        assert_eq!(format_elapsed(Duration::from_millis(5000)), "5.0s");
+    }
+
+    #[test]
+    fn format_elapsed_minutes() {
+        assert_eq!(format_elapsed(Duration::from_secs(65)), "1m 5s");
+        assert_eq!(format_elapsed(Duration::from_secs(120)), "2m 0s");
+    }
 }