feat(ai-tools): drop OpenCode and Grok Build

- opencode.json / grok.json leave the built-in catalog; opencode-usage.js,
  its poller, transcript branch and table creation go with it (existing
  tables and session rows stay as history).
- A Grok payload reaching the Claude hook route (Grok runs the Claude hooks
  itself) is dropped instead of recorded as tool = 'grok'.
- quota.js no longer reads Grok or OpenCode Go logins.
- Redone on v2.8.22 from c6b2892 (feat/grok-usage, never merged).

server/data/ai-tools/README.md

@@ -13,7 +13,7 @@ id follows, as one more argv element — `pty-run.js` emits them in place of
 `resume` when a start carries `resumeSessionId`, and only for an id that starts
 with a letter or digit. A tool without it (and without a `launcher`) refuses a
 resume by id (`EUNSUPPORTED`) rather than start fresh under a "resume".
-Built-in: omp, Grok and Cursor (`--resume`), OpenCode (`--session`). omp always gets `--allow-home`: started in its account's home (a workspace there) it would otherwise move to a temp dir, and its session would name that folder, not the workspace's. A session id may carry `_` (OpenCode's `ses_…`).
+Built-in: omp and Cursor (`--resume`). omp always gets `--allow-home`: started in its account's home (a workspace there) it would otherwise move to a temp dir, and its session would name that folder, not the workspace's. A session id may carry `_`.
 
 ## Install / update (A2)
 

server/data/ai-tools/grok.json

@@ -1,41 +0,0 @@
-{
-  "id": "grok",
-  "label": "Grok Build",
-  "detect": [
-    "grok"
-  ],
-  "prompt": {
-    "mode": "argv",
-    "separator": "--"
-  },
-  "model": {
-    "flag": "--model"
-  },
-  "resume": [
-    "--continue"
-  ],
-  "resumeById": [
-    "--resume"
-  ],
-  "bypass": [
-    "--permission-mode",
-    "bypassPermissions"
-  ],
-  "homepageUrl": "https://x.ai/cli",
-  "faviconDomain": "x.ai",
-  "install": {
-    "kind": "script",
-    "url": "https://x.ai/cli/install.sh"
-  },
-  "update": {
-    "kind": "self",
-    "args": [
-      "update"
-    ]
-  },
-  "config": [
-    {
-      "path": "~/.grok/config.toml"
-    }
-  ]
-}

server/data/ai-tools/opencode.json

@@ -1,37 +0,0 @@
-{
-  "id": "opencode",
-  "label": "OpenCode",
-  "detect": [
-    "opencode"
-  ],
-  "prompt": {
-    "mode": "flag",
-    "flag": "--prompt"
-  },
-  "model": {
-    "flag": "--model"
-  },
-  "resume": [
-    "--continue"
-  ],
-  "resumeById": [
-    "--session"
-  ],
-  "homepageUrl": "https://opencode.ai/docs/cli/",
-  "install": {
-    "kind": "npm",
-    "package": "opencode-ai"
-  },
-  "update": {
-    "kind": "npm"
-  },
-  "config": [
-    {
-      "path": "~/.config/opencode/opencode.json",
-      "format": "jsonc"
-    },
-    {
-      "path": "~/.config/opencode/opencode.jsonc"
-    }
-  ]
-}