feat(agent-office): notification badges + CEO desk document panel + telegram test

- Add notification state management with badge counts in useAgentManager
- Render exclamation badge on agent sprites (separate from status icons)
- Add CEO desk document icon with click-to-open activity panel
- Create DocumentPanel with unified activity feed + per-agent detail tabs
- Add telegram test button to stock agent ChatPanel
- Remove TaskHistory + bottom toolbar (replaced by DocumentPanel)
- Add getActivityFeed API helper

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

src/pages/agent-office/hooks/useOfficeCanvas.js

@@ -2,7 +2,7 @@ import { useRef, useEffect, useCallback } from 'react';
 import { OfficeRenderer } from '../canvas/OfficeRenderer';
 import officeMap from '../assets/office-map.json';
 
-export function useOfficeCanvas(containerRef, onAgentClick) {
+export function useOfficeCanvas(containerRef, onAgentClick, onCeoClick) {
   const rendererRef = useRef(null);
 
   useEffect(() => {
@@ -30,6 +30,10 @@ export function useOfficeCanvas(containerRef, onAgentClick) {
       if (onAgentClick) onAgentClick(agentId);
     });
 
+    renderer.setOnCeoClick(() => {
+      if (onCeoClick) onCeoClick();
+    });
+
     const handleClick = (e) => {
       const rect = canvas.getBoundingClientRect();
       const x = e.clientX - rect.left;
@@ -48,7 +52,7 @@ export function useOfficeCanvas(containerRef, onAgentClick) {
         containerRef.current.removeChild(canvas);
       }
     };
-  }, [containerRef, onAgentClick]);
+  }, [containerRef, onAgentClick, onCeoClick]);
 
   const updateAgentState = useCallback((agentId, state, detail) => {
     rendererRef.current?.updateAgentState(agentId, state, detail);
@@ -58,5 +62,13 @@ export function useOfficeCanvas(containerRef, onAgentClick) {
     rendererRef.current?.moveAgent(agentId, target);
   }, []);
 
-  return { updateAgentState, moveAgent };
+  const setAgentNotification = useCallback((agentId, count) => {
+    rendererRef.current?.setAgentNotification(agentId, count);
+  }, []);
+
+  const setCeoDocBadge = useCallback((count) => {
+    rendererRef.current?.setCeoDocBadge(count);
+  }, []);
+
+  return { updateAgentState, moveAgent, setAgentNotification, setCeoDocBadge };
 }