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.

client/src/i18n/locales/en/settings.json

@@ -137,7 +137,8 @@
     "incomplete": "Hooks incomplete",
     "reinstall": "Reinstall Hooks",
     "success": "Hooks installed successfully",
-    "failed": "Hook installation failed"
+    "failed": "Hook installation failed",
+    "plugin": "Provided by the agenthub plugin (its plugin.json), not settings.json"
   },
   "lanesSection": {
     "title": "Workspaces",
@@ -311,16 +312,51 @@
     "unavailable": "Not available here: needs systemd --user on Linux, or a GUI login on macOS.",
     "foreign": "A service named agenthub that AgentHub did not write already exists — AgentHub leaves it alone."
   },
+  "tray": {
+    "label": "Show AgentHub icon in the status area",
+    "desc": "An AgentHub icon beside the clock (top bar, menu bar or notification area) to open the dashboard, quit it, and start it again after a quit.",
+    "unavailable": "Not available here: needs a graphical desktop session, and is off in server mode."
+  },
+  "quit": {
+    "label": "Quit AgentHub",
+    "desc": "Stop the dashboard so nothing runs in the background. Opening Claude Code no longer starts it; run `agenthub start` to bring it back.",
+    "button": "Quit",
+    "confirmTitle": "Quit AgentHub?",
+    "confirmMessage": "Every workspace terminal is closed — running agents stop — and the dashboard shuts down. It stays off until you run `agenthub start`.",
+    "confirmMessageAutostart": "Every workspace terminal is closed — running agents stop — and the dashboard shuts down. It stays off until you run `agenthub start`, or until the next boot/login (start automatically is on).",
+    "done": "AgentHub is stopping. Run `agenthub start` to start it again."
+  },
   "about": {
-    "title": "About",
-    "description": "Server runtime information.",
+    "title": "System",
     "release": "Release",
     "uiBuild": "UI build v{{version}} (rebuild client to match)",
     "uptime": "Uptime",
     "nodejs": "Node.js",
     "platform": "Platform",
-    "wsClients": "WS Clients",
-    "loadingInfo": "Loading server info..."
+    "wsClients": "Live connections",
+    "wsClientsDesc": "Browser tabs and tools receiving live updates",
+    "loadingInfo": "Loading server info...",
+    "server": "Server",
+    "cpu": "CPU",
+    "cpuValue": "{{count}} cores · load {{load}}",
+    "memory": "Process memory",
+    "memoryValue": "{{rss}} RSS · heap {{used}} of {{limit}}",
+    "systemMemory": "System memory",
+    "systemMemoryValue": "{{used}} used of {{total}}",
+    "install": "Installation",
+    "installKind": {
+      "plugin": "Claude Code plugin",
+      "checkout": "Git checkout"
+    },
+    "latest": "Latest release",
+    "upToDate": "Up to date",
+    "updateAvailable": "Update available",
+    "unknown": "Unknown",
+    "database": "Database",
+    "dbFile": "Database file",
+    "journal": "Journal mode",
+    "activity": "Events recorded",
+    "activityValue": "{{m5}} in 5 min · {{m15}} in 15 min · {{h1}} in 1 h"
   },
   "tables": {
     "sessions": "sessions",
@@ -764,9 +800,7 @@
     "group": {
       "general": "General",
       "agents": "Agents",
-      "routing": "Routing",
-      "git": "Git",
-      "cost": "Cost"
+      "data": "Data"
     },
     "section": {
       "appearance": {
@@ -800,37 +834,25 @@
         "title": "Pricing",
         "description": "Model prices for every vendor, used to estimate cost. Rates per million tokens (USD); % is a wildcard in a pattern; a model's introductory rate is shown in violet."
       },
-      "gitCredentials": {
-        "title": "Git credentials",
-        "description": "Logins AgentHub gives git for a dashboard fetch, pull or push."
-      },
-      "worktrees": {
-        "title": "Worktrees",
-        "description": "Which untracked git worktrees a workspace's Add folder suggests."
-      },
       "data": {
-        "title": "Data",
-        "description": "Cost and database overview, import, remote sources, export, cleanup and the danger zone."
-      },
-      "about": {
-        "title": "About",
-        "description": "Server version, uptime and runtime."
-      },
-      "snapshots": {
-        "title": "Snapshots",
-        "description": "Frozen, read-only copies of sessions, each behind its own link."
+        "title": "Database",
+        "description": "Total cost, database overview, import, remote sources, export, cleanup and the danger zone."
       },
       "reports": {
-        "title": "Reports",
-        "description": "Analytics summaries written on a schedule, as HTML or JSON."
+        "title": "Snapshots & reports",
+        "description": "Read-only session snapshots behind their own links, and analytics summaries written on a schedule."
       },
-      "users": {
-        "title": "Users",
-        "description": "Accounts, their usage and the audit log."
+      "system": {
+        "title": "System",
+        "description": "Version, install, start at login, server runtime and the database file."
+      },
+      "git": {
+        "title": "Git",
+        "description": "Logins AgentHub gives git for a dashboard fetch, pull or push, and which worktrees Add folder suggests."
       }
     },
     "backPrevious": "Back",
-    "unknownSection": "There is no “{{section}}” settings page — showing General instead."
+    "unknownSection": "There is no “{{section}}” settings page — showing Appearance instead."
   },
   "search": {
     "placeholder": "Search settings",
@@ -856,6 +878,18 @@
       "vi": "Tiếng Việt"
     }
   },
+  "terminalFont": {
+    "title": "Terminal font",
+    "description": "The font of the workspace terminals. Takes effect the next time a terminal opens. Saved in this browser only.",
+    "label": "Font",
+    "names": {
+      "jetbrains": "JetBrains Mono",
+      "maple": "Maple Mono (rounded)",
+      "system": "System font"
+    },
+    "systemNote": "Your browser's fixed-width font. It may lack some Vietnamese letters (ấ, ế, ố…), which then draw out of line.",
+    "preview": "Preview"
+  },
   "rowMenu": {
     "copyHost": "Copy host",
     "copyUrl": "Copy endpoint",
@@ -947,20 +981,9 @@
     "imported": "Imported {{count}} preference(s). Reloading…",
     "badFile": "That file is not an AgentHub preferences file."
   },
-  "users": {
-    "title": "Users",
-    "description": "Every account on this server, with its workspaces, sessions and recent usage.",
-    "name": "User",
-    "role": "Role",
-    "workspaces": "Workspaces",
-    "sessions": "Sessions",
-    "last7d": "7 days",
-    "last30d": "30 days",
-    "disabled": "disabled",
-    "tokens": "{{n}} tokens",
-    "manageHint": "Add, disable or change a user on the host: agenthub users …",
-    "auditTitle": "Audit log",
-    "auditDescription": "Each time an admin or analyst opened a session a member owns.",
-    "auditEmpty": "No reads recorded yet."
+  "pricingLink": {
+    "title": "Model pricing",
+    "description": "Prices for every vendor's models live on one page.",
+    "open": "Open Pricing"
   }
 }