Give bots tools and MCP servers per bot and workspace, with status and tests

- Bots and workspaces get tools and MCP servers from their settings
  pages; bots also from chips under the chat composer, removable there
- "Every bot" now gives one to every bot now and every new bot; each can
  still drop it (attach-every-bot-extensions.ts moves old installs over)
- Status lines: MCP servers record whether they connect, tools whether
  their last run worked
- Test connection in the MCP form and a Test panel in the tool form check
  the form as it is, without saving
- Hide Google sign-in on the login form

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/pages/auth/login/(partials)/login-form/index.tsx

@@ -15,7 +15,7 @@ export default function LoginForm() {
 
     return (
         <LoginShell status={status}>
-            <GoogleAuthSection {...init} />
+            {/* <GoogleAuthSection {...init} /> */}
             <Form
                 className="w-full flex items-center justify-center relative gap-4"
                 onSubmit={() => {