Improve agent detail, issue creation, and approvals pages

Expand AgentDetail with heartbeat history and manual trigger controls.
Enhance NewIssueDialog with richer field options. Add agent connection
string retrieval API. Improve issue routes with parent chain resolution.
Clean up Approvals page layout. Update query keys and validators.

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

server/src/routes/agents.ts

@@ -247,6 +247,13 @@ export function agentRoutes(db: Db) {
     res.json(agent);
   });
 
+  router.get("/agents/:id/keys", async (req, res) => {
+    assertBoard(req);
+    const id = req.params.id as string;
+    const keys = await svc.listKeys(id);
+    res.json(keys);
+  });
+
   router.post("/agents/:id/keys", validate(createAgentKeySchema), async (req, res) => {
     assertBoard(req);
     const id = req.params.id as string;
@@ -268,6 +275,17 @@ export function agentRoutes(db: Db) {
     res.status(201).json(key);
   });
 
+  router.delete("/agents/:id/keys/:keyId", async (req, res) => {
+    assertBoard(req);
+    const keyId = req.params.keyId as string;
+    const revoked = await svc.revokeKey(keyId);
+    if (!revoked) {
+      res.status(404).json({ error: "Key not found" });
+      return;
+    }
+    res.json({ ok: true });
+  });
+
   router.post("/agents/:id/wakeup", validate(wakeAgentSchema), async (req, res) => {
     const id = req.params.id as string;
     const agent = await svc.getById(id);