feat(kanban): card detail modal and rich agent-run console

- RunEventList: grouped activity timeline. Assistant text becomes chat
  bubbles (auto-collapsing long messages); tool_start/tool_end pair into
  entries with spinners and expandable input/result blocks; bevy output
  rolls into a live console; relative timestamps on a left rail
- AgentRunBar: redesigned as a mission console. Live stats header (elapsed
  time, tool count, events), animated status banner with sweep/glow while
  running, clearer action bar. All controls preserved (run/steer/stop,
  diff/merge/bevy) so the human-only merge/complete safety model holds
- tailwind.css: vn-flow, vn-sweep, vn-dots, vn-spin keyframes
- CardModal: full card overlay (orchestrator, references, tags, comments)
- DiffModal: branch-diff review (commits, stat, capped patch)
- useOrchestrator: background polling + bevy status sync + ref-counted SSE
- KanbanCard: pulsing agent/bevy running badge on collapsed cards

apps/docs/src/components/kanban/useKanbanBoard.ts

@@ -24,7 +24,6 @@ interface UseKanbanBoard {
     ref: { label: string; type: ReferenceType; href: string },
   ) => Promise<void>;
   removeReference: (cardId: string, href: string) => Promise<void>;
-  reset: () => Promise<void>;
 }
 
 export function useKanbanBoard(): UseKanbanBoard {
@@ -208,16 +207,6 @@ export function useKanbanBoard(): UseKanbanBoard {
     [run],
   );
 
-  const reset = useCallback(async () => {
-    setError(null);
-    try {
-      await kanbanApi.reset();
-      await reload();
-    } catch (e) {
-      setError(e instanceof Error ? e.message : 'Reset failed');
-    }
-  }, [reload]);
-
   return {
     board,
     pages,
@@ -231,6 +220,5 @@ export function useKanbanBoard(): UseKanbanBoard {
     removeTag,
     addReference,
     removeReference,
-    reset,
   };
 }