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/sessions.js

@@ -138,7 +138,9 @@ function tokensForSessions(ids) {
         cache_write_1h_tokens + baseline_cache_write_1h as cache_write_1h_tokens,
         web_search_requests + baseline_web_search as web_search_requests,
         web_fetch_requests + baseline_web_fetch as web_fetch_requests,
-        code_execution_requests + baseline_code_execution as code_execution_requests
+        code_execution_requests + baseline_code_execution as code_execution_requests,
+        long_input_tokens, long_output_tokens, long_cache_read_tokens,
+        long_cache_write_tokens, long_cache_write_1h_tokens
       FROM token_usage WHERE session_id IN (${ids.map(() => "?").join(",")})`
     )
     .all(...ids);