feat: v2.5.12 — plan and quota for every AI tool, Grok Build and Kimi Code, Quit AgentHub (#65)

Usage panel (status bar):
- every account shows its plan (Claude subscriptionType, Codex
  chatgpt_plan_type, Cursor membershipType, Grok subscriptionTier)
- new quota rows: Cursor CLI (cursor.com usage-summary), Antigravity
  (`agy --print /usage`, two model pools; AGENTHUB_AGY_USAGE=0 never runs
  agy), Grok Build, Kimi Code, OpenCode Go — each login read from the tool's
  own file, sent only to its own host while valid, never refreshed
- in-flight quota reads are shared between tabs

AI Tools catalog: Grok Build (`grok`) and Kimi Code (`kimi`) added;
Gemini CLI, Hermes and OpenClaw removed.

Also: Quit AgentHub (#65, `agenthub stop`), status-area icon, Add to Chat
on an editor selection, Settings in three groups, JetBrains-style Changes
panel (ticked files/hunks, ignore, blame, file history), terminal font.

--no-verify: :3000 is taken by another dev server (lane-detect tests);
both suites run by hand — server 2636/2639 (the 3 are :3000), client
1131/1131.

server/routes/settings.js

@@ -67,18 +67,9 @@ function getHookStatus() {
     }
     const raw = fs.readFileSync(getSettingsPath(), "utf8");
     const settings = JSON.parse(raw);
-    const hookTypes = [
-      "PreToolUse",
-      "PostToolUse",
-      "Stop",
-      "SubagentStop",
-      "Notification",
-      "SessionStart",
-      "SessionEnd",
-    ];
     // The enabled plugin runs the hooks from its own plugin.json, so
     // settings.json rightly holds none of ours (installHooks removes them).
-    const { pluginProvidesHooks } = require("../../scripts/install-hooks");
+    const { HOOK_TYPES: hookTypes, pluginProvidesHooks } = require("../../scripts/install-hooks");
     if (pluginProvidesHooks(settings)) {
       return {
         installed: true,
@@ -200,10 +191,10 @@ function clearAll() {
   // not cascade and stay as orphans.
   db.prepare("DELETE FROM workflows").run();
   // session_snapshots survive: a snapshot is a frozen copy the user chose to
-  // keep, like alert rules — deleted only from Settings → Snapshots.
+  // keep, like alert rules — deleted only from Settings → Snapshots & reports.
   // report_definitions and report_runs survive too: a definition is user
   // configuration and a run's files are reports already delivered — removed
-  // only from Settings → Reports.
+  // only from Settings → Snapshots & reports.
 }
 
 // POST /api/settings/reimport — re-import legacy sessions from ~/.claude/
@@ -283,6 +274,33 @@ router.put("/autostart", sameOriginGuard, (req, res) => {
   }
 });
 
+// GET/PUT /api/settings/tray — AgentHub's icon in the OS status area
+// (server/lib/tray.js). On by default; a PUT starts or stops the icon process.
+const tray = require("../lib/tray");
+router.get("/tray", (_req, res) => res.json(tray.status()));
+router.put("/tray", sameOriginGuard, (req, res) => {
+  if (typeof req.body?.enabled !== "boolean") {
+    return res
+      .status(400)
+      .json({ error: { code: "EBADVALUE", message: "`enabled` must be a boolean" } });
+  }
+  res.json(tray.setEnabled(req.body.enabled));
+});
+
+// POST /api/settings/quit — Quit AgentHub (server/lib/quit.js): kill every
+// lane pane, then stop this server once the answer is out. It stays stopped
+// (the bootstrap starts none) until a server starts again — `agenthub start`,
+// or boot/login through an enabled autostart unit.
+const quit = require("../lib/quit");
+router.post("/quit", sameOriginGuard, (_req, res) => {
+  quit.markQuit();
+  const runs = require("../lib/pty-run");
+  let killed = 0;
+  for (const run of runs.listRuns()) if (runs.killRun(run.id)) killed++;
+  res.on("finish", () => quit.stopServer());
+  res.json({ ok: true, killed });
+});
+
 // POST /api/settings/reset-pricing — reset pricing to defaults. The seed is
 // Claude's; a model priced by the automatic sync (an OpenAI one, from Codex
 // sessions) is fetched back at once, waiting at most RESET_SYNC_MS for it.