feat(FN-3394): add evals dashboard view with API routes and client hooks

Adds a full evals dashboard view (FN-3394) with a client hook, server-side read routes, and navigation integration across the Header and mobile nav, backed by comprehensive tests. Wires Hermes chat message tools with mailbox behavior documentation (FN-3620), and extends the agent heartbeat and tools

Fusion-Task-Id: FN-3394

docs/dashboard-guide.md

@@ -245,6 +245,20 @@ Features:
 
 For mission planning context and handoff structure, see [Missions guide](./missions.md).
 
+## Evals View
+
+Evals view is a dedicated dashboard surface for reviewing scheduled task-evaluation output.
+
+Navigation:
+- Desktop: **Header → More views → Evals**
+- Mobile: **More** sheet → **Evals**
+
+Features:
+- Filter eval results by free-text query, run, and score range
+- Review list summaries (task, eval/run identity, timestamps, and score)
+- Drill into full rationale, category scores, evidence references, and suggested follow-ups
+- Open Scheduled Evals settings directly when setup is disabled
+
 ## Insights View
 
 Insights view surfaces categorized project insights and lets you turn findings into work.