feat(kanban): Interactive Kanban board with real-time task tracking (#83)

* feat(kanban): add Kanban board with task-manager skill, modal UI, and desk clutter

Implement a full Kanban board system for tracking agent tasks:
- Add task-manager skill with shared JSON task store for persistence
- Render board as a floating modal over the live 3D office (not immersive)
- Auto-create tasks from actionable user messages with heuristic filtering
- Sync task status through OpenClaw agent lifecycle events
- Collapse task details panel by default, expand on card click
- Add dynamic desk clutter (papers, folders, etc.) reflecting active task count
- Exclude done tasks from desk clutter count
- Extract KANBAN_CLUTTER_OFFSET for easy positioning adjustment
- Add install flow with progress bar for the task-manager skill
- Include unit and e2e test coverage

Made-with: Cursor

* feat(kanban): production-harden task board with AI-free classification, resilient persistence, and modal UX

- Harden shared task store with atomic writes, payload size limits, and server-side enum validation
- Add client resilience: request timeouts (AbortController), exponential backoff retries, poll deduplication
- Implement optimistic UI with rollback on all card mutations (update, move, archive)
- Add modal accessibility: focus trap, Escape to close, aria-modal, keyboard card navigation
- Trust OpenClaw agent lifecycle phase=start as task classification signal instead of regex heuristics
- Keep regex heuristic only as lightweight filter for direct chat events (conversational noise)
- Expand verb recognition with typo tolerance and broader action vocabulary
- Create tasks from agent runs even when no chat event is received (external channel support)
- Merge dual header bars into single bar; reposition close button outside modal corner
- Exclude done tasks from desk clutter count; make clutter position configurable via KANBAN_CLUTTER_OFFSET
- Update default furniture layout to match user configuration
- Ensure kanban_board furniture persists in local storage across sessions
- Add comprehensive test coverage for store, API route, and controller logic

Made-with: Cursor

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Co-authored-by: iamlukethedev <lucas.guilherme@smartwayslfl.com>

tests/unit/skillTriggers.test.ts

@@ -15,11 +15,17 @@ describe("skill triggers", () => {
     const todoTrigger = listPackagedSkillTriggerDefinitions().find(
       (entry) => entry.skillKey === "todo-board",
     );
+    const taskManagerTrigger = listPackagedSkillTriggerDefinitions().find(
+      (entry) => entry.skillKey === "task-manager",
+    );
 
     expect(todoTrigger).not.toBeUndefined();
     expect(todoTrigger?.movementTarget).toBe("desk");
     expect(todoTrigger?.activationPhrases).toContain("todo");
     expect(todoTrigger?.activationPhrases).toContain("blocked tasks");
+    expect(taskManagerTrigger).not.toBeUndefined();
+    expect(taskManagerTrigger?.movementTarget).toBe("desk");
+    expect(taskManagerTrigger?.activationPhrases).toContain("add a task");
   });
 
   it("matches the running agent's latest request against enabled skill triggers", () => {