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/__tests__/ai-tools-route.test.js

@@ -26,8 +26,28 @@ for (const name of ["claude", "agy", "npm"]) {
 const origPath = process.env.PATH;
 process.env.PATH = BIN;
 
+// An npm-installed tool, in the release-synced tier (only a release catalog may
+// name an installer): no built-in tool updates through npm.
+const REMOTE = path.join(ROOT, "remote-catalog");
+fs.mkdirSync(REMOTE);
+fs.writeFileSync(
+  path.join(REMOTE, "npmtool.json"),
+  JSON.stringify({
+    id: "npmtool",
+    label: "npm tool",
+    detect: ["npmtool"],
+    prompt: { mode: "flag", flag: "--prompt" },
+    install: { kind: "npm", package: "npmtool" },
+    update: { kind: "npm" },
+  })
+);
+
 const { createApp } = require("../index");
-require("../lib/ai-tools").refresh();
+require("../lib/ai-tools").__setCatalogDirs([
+  path.join(__dirname, "..", "data", "ai-tools"),
+  REMOTE,
+  path.join(ROOT, "custom-catalog"),
+]);
 
 let app;
 let base;
@@ -59,7 +79,7 @@ describe("/api/ai-tools", () => {
     assert.equal(agy.path, path.join(BIN, "agy"));
     assert.equal(agy.resume, true);
     assert.equal(agy.bypass, true);
-    assert.equal(body.tools.find((t) => t.id === "opencode").installed, false);
+    assert.equal(body.tools.find((t) => t.id === "npmtool").installed, false);
     assert.equal("args" in agy, false);
   });
 
@@ -76,7 +96,7 @@ describe("/api/ai-tools", () => {
 
   it("answers ENOTOOL / EBADDEFAULT / EBADFIELD", async () => {
     assert.equal((await request("PUT", "/api/ai-tools/nope", { enabled: false })).status, 404);
-    const bad = await request("PUT", "/api/ai-tools/opencode", { default: true });
+    const bad = await request("PUT", "/api/ai-tools/npmtool", { default: true });
     assert.equal(bad.status, 400);
     assert.equal(bad.body.error.code, "EBADDEFAULT");
     assert.equal((await request("PUT", "/api/ai-tools/claude", { enabled: "no" })).status, 400);
@@ -112,10 +132,10 @@ describe("/api/ai-tools", () => {
   });
 
   it("refresh re-detects", async () => {
-    fs.writeFileSync(path.join(BIN, "opencode"), "#!/bin/sh\n");
-    fs.chmodSync(path.join(BIN, "opencode"), 0o755);
+    fs.writeFileSync(path.join(BIN, "npmtool"), "#!/bin/sh\n");
+    fs.chmodSync(path.join(BIN, "npmtool"), 0o755);
     const r = await request("POST", "/api/ai-tools/refresh");
-    assert.equal(r.body.tools.find((t) => t.id === "opencode").installed, true);
+    assert.equal(r.body.tools.find((t) => t.id === "npmtool").installed, true);
   });
 
   it("/api/run/binary resolves through the catalog", async () => {
@@ -132,9 +152,9 @@ describe("lanes on catalog tools", () => {
       fs.mkdirSync(d, { recursive: true });
       return d;
     };
-    let r = await request("POST", "/api/lanes", { cwd: dir("a"), title: "a", tool: "opencode" });
+    let r = await request("POST", "/api/lanes", { cwd: dir("a"), title: "a", tool: "npmtool" });
     assert.equal(r.status, 201);
-    assert.equal(r.body.lane.tool, "opencode");
+    assert.equal(r.body.lane.tool, "npmtool");
     r = await request("POST", "/api/lanes", { cwd: dir("b"), title: "b", tool: "omp" });
     assert.equal(r.status, 201, "a tool that is not installed may still get a lane");
     r = await request("POST", "/api/lanes", { cwd: dir("c"), title: "c", tool: "nope" });
@@ -212,8 +232,8 @@ describe("install / update / icons", () => {
     const notInstalled = await request("POST", "/api/ai-tools/codex/update");
     assert.equal(notInstalled.status, 409);
     assert.equal(notInstalled.body.error.code, "ENOTINSTALLED");
-    // opencode was put on PATH by the refresh test, outside any npm prefix.
-    const notNpm = await request("POST", "/api/ai-tools/opencode/update");
+    // npmtool was put on PATH by the refresh test, outside any npm prefix.
+    const notNpm = await request("POST", "/api/ai-tools/npmtool/update");
     assert.equal(notNpm.status, 409);
     assert.equal(notNpm.body.error.code, "ENOTNPM");
     const cross = await request("POST", "/api/ai-tools/codex/install", undefined, {
@@ -241,7 +261,7 @@ describe("install / update / icons", () => {
     assert.deepEqual(spawned.at(-1), [path.join(BIN, "claude"), "update"]);
     const v = await request("GET", "/api/ai-tools/versions");
     assert.equal(v.status, 200);
-    assert.equal(v.body.opencode.npmManaged, false);
+    assert.equal(v.body.npmtool.npmManaged, false);
   });
 
   it("update-all answers ENOTHING when nothing has an update", async () => {