refactor: reorder visualizer tabs into logical groupings (#934)

Reorganize the 10-tab TUI visualizer for better workflow:
- Core project views: Progress, Timeline, Deps
- Analytics/monitoring: Metrics, Health, Agent
- Content: Changes, Knowledge, Captures
- Utility: Export (moved to last position)

Updated all tab index references (switch cases, export key
handling, export status display) and corrected help text
from "7-tab" to "10-tab" with accurate tab listing.

src/resources/extensions/gsd/commands.ts

@@ -86,7 +86,7 @@ export function registerGSDCommand(pi: ExtensionAPI): void {
         { cmd: "stop", desc: "Stop auto mode gracefully" },
         { cmd: "pause", desc: "Pause auto-mode (preserves state, /gsd auto to resume)" },
         { cmd: "status", desc: "Progress dashboard" },
-        { cmd: "visualize", desc: "Open workflow visualizer (progress, deps, metrics, timeline)" },
+        { cmd: "visualize", desc: "Open 10-tab workflow visualizer (progress, timeline, deps, metrics, health, agent, changes, knowledge, captures, export)" },
         { cmd: "queue", desc: "Queue and reorder future milestones" },
         { cmd: "quick", desc: "Execute a quick task without full planning overhead" },
         { cmd: "discuss", desc: "Discuss architecture and decisions" },
@@ -603,7 +603,7 @@ function showHelp(ctx: ExtensionCommandContext): void {
     "",
     "VISIBILITY",
     "  /gsd status         Show progress dashboard  (Ctrl+Alt+G)",
-    "  /gsd visualize      Interactive 7-tab TUI (progress, deps, metrics, timeline, agent, changes, export)",
+    "  /gsd visualize      Interactive 10-tab TUI (progress, timeline, deps, metrics, health, agent, changes, knowledge, captures, export)",
     "  /gsd queue          Show queued/dispatched units and execution order",
     "  /gsd history        View execution history  [--cost] [--phase] [--model] [N]",
     "",