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/openapi.js

@@ -904,6 +904,15 @@ function createOpenApiSpec() {
               type: "number",
               description: "Fast-mode output rate (0 = none)",
             },
+            long_input_per_mtok: {
+              type: "number",
+              description:
+                "Input rate for a request whose prompt is above 100k tokens (0 = none); cache rates scale by long_input / input",
+            },
+            long_output_per_mtok: {
+              type: "number",
+              description: "Output rate for a request whose prompt is above 100k tokens (0 = none)",
+            },
             source: {
               type: "string",
               nullable: true,
@@ -971,6 +980,15 @@ function createOpenApiSpec() {
             web_search_requests: { type: "integer" },
             web_fetch_requests: { type: "integer" },
             code_execution_requests: { type: "integer" },
+            long_input_tokens: {
+              type: "integer",
+              description:
+                "Part of input_tokens spent by requests whose prompt was above 100k tokens",
+            },
+            long_output_tokens: { type: "integer" },
+            long_cache_read_tokens: { type: "integer" },
+            long_cache_write_tokens: { type: "integer" },
+            long_cache_write_1h_tokens: { type: "integer" },
             cost: { type: "number" },
             matched_rule: { type: "string", nullable: true },
           },