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.

scripts/plugin-bootstrap.js

@@ -35,6 +35,7 @@ const crypto = require("crypto");
 const { spawn, spawnSync } = require("child_process");
 
 const { getDataDir, getClaudeHome, getSettingsPath } = require("../server/lib/claude-home");
+const { isQuit } = require("../server/lib/quit");
 const { getServerInfoPath } = require("../server/lib/server-info");
 const { isOurEntry } = require("./install-hooks");
 
@@ -178,7 +179,8 @@ function fastPathOk(rt = runtimeDir()) {
   // worker. (Observed: 271 PreToolUse events for ~135 real tool calls, and one
   // Task spawning two subagent rows.)
   if (hasLegacyHooks()) return false;
-  return serverIsLive();
+  // Quit (server/lib/quit.js): nothing to start until the user starts it.
+  return serverIsLive() || isQuit(rt);
 }
 
 /* ------------------------------------------------------- node version gate */
@@ -740,7 +742,11 @@ function bootstrap(rt = runtimeDir(), { force = false } = {}) {
     // running process must be replaced"; `unitStale` is "the unit names a cache
     // directory that is no longer this one", which is invisible until a reboot
     // and must be repaired even while a perfectly healthy server is up.
-    const needsServer = movedRoot || !serverIsLive();
+    // A Quit holds every start off (an explicit `--force` from
+    // /agenthub-update overrides it); the unit is still repaired below.
+    const quit = !force && isQuit(rt);
+    if (quit) log(rt, "AgentHub was quit — not starting it (agenthub start brings it back)");
+    const needsServer = !quit && (movedRoot || !serverIsLive());
     const unitStale = svc.unitIsStale("agenthub", PLUGIN_ROOT);
     if (needsServer || unitStale) {
       const unit = {