Phase 4-6: Message Bus, Memory Search (ChromaDB), Token Tracking, Topology Graph

Phase 4: Message Bus Viewer
- Backend: get_message_bus_status(), send_bus_message() in agents.py
- Route: GET /api/agents/message-bus, POST /api/agents/{id}/bus-message
- Frontend: Message Bus tab in agent detail overlay

Phase 5: Memory Search (ChromaDB)
- Backend: _search_agent_memory(), _search_all_agents_memory() via ChromaDB rose_memory collection
- Route: GET /api/agents/memory/search, GET /api/agents/{id}/memory/search
- Frontend: Search bar added to Memory tab, renders confidence scores + topics

Phase 6: Token Tracking + Topology Graph
- Backend: get_agent_usage() reads ~/.hermes/agents/{id}/usage.json
- Route: GET /api/agents/{id}/usage
- Frontend: Usage tab with today/week/month token counts and cost
- Frontend: Topology tab with SVG radial graph of agent network

static/style.css

@@ -1101,6 +1101,8 @@ body.resizing{user-select:none;cursor:col-resize;}
 .logs-toolbar-right{display:flex;align-items:center;gap:6px;flex-wrap:wrap;}
 .logs-filename{font-size:12px;font-weight:600;color:var(--text);}
 .logs-pre{flex:1;overflow:auto;margin:0;padding:12px;font-family:'Fira Code','Cascadia Code',Monaco,monospace;font-size:11px;line-height:1.6;color:var(--text);background:var(--code-bg);white-space:pre-wrap;word-break:break-all;}
+mark.log-highlight{background:rgba(255,220,50,.35);color:inherit;border-radius:2px;padding:0 1px;}
+.log-line{display:block;}
 .logs-footer{display:flex;align-items:center;gap:8px;}
 .log-level-btn{background:transparent;border:1px solid var(--border2);border-radius:4px;padding:2px 6px;font-size:10px;font-weight:700;cursor:pointer;color:var(--muted);transition:all .1s;}
 .log-level-btn:hover,.log-level-btn.active{background:rgba(255,255,255,.08);color:var(--text);}