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/components/run/__tests__/TerminalView.test.tsx

@@ -11,7 +11,7 @@
 import { describe, it, expect, vi, beforeAll, beforeEach, afterEach } from "vitest";
 import { render, cleanup, act, fireEvent, screen, waitFor } from "@testing-library/react";
 import { TerminalView, loadXterm } from "../TerminalView";
-import { pasteToRun } from "../../../lib/panePaste";
+import { pasteToLane, pasteToRun } from "../../../lib/panePaste";
 
 const writeMock = vi.fn();
 const onDataHandlers: Array<(d: string) => void> = [];
@@ -311,6 +311,25 @@ describe("TerminalView", () => {
     }
   });
 
+  it("takes the workspace's paste once it is the focused pane, clicked into or not", () => {
+    const width = vi.spyOn(HTMLElement.prototype, "offsetWidth", "get").mockReturnValue(800);
+    try {
+      const both = (focus: number) => (
+        <>
+          <TerminalView runId="agenthub-lane-9" wsBaseUrl="ws://x" autoFocus={focus === 0} />
+          <TerminalView runId="agenthub-lane-9-1" wsBaseUrl="ws://x" autoFocus={focus === 1} />
+        </>
+      );
+      const { rerender } = render(both(0));
+      expect(pasteToLane(9, "a")).toBe("agenthub-lane-9");
+      // Alt+2, a tab click: the Workspace moves the focus, the DOM may not.
+      rerender(both(1));
+      expect(pasteToLane(9, "a")).toBe("agenthub-lane-9-1");
+    } finally {
+      width.mockRestore();
+    }
+  });
+
   it("takes the keyboard as soon as it mounts", () => {
     // The terminal IS the page here — without this the first thing typed after
     // opening a lane went nowhere until the user clicked the pane.