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/utils/extension-option-value.ts

@@ -0,0 +1,16 @@
+import type { BotExtension } from "@/src/types";
+
+/**
+ * An MCP server or tool as one select value (`mcp:3`), and back.
+ */
+export function extensionOptionValue({ kind, id }: { kind: BotExtension["kind"]; id: number }) {
+    return `${kind}:${id}`;
+}
+
+export function parseExtensionOptionValue({ value }: { value: string }) {
+    const [kind, id] = value.split(":");
+
+    if ((kind != "mcp" && kind != "tool") || !Number(id)) return null;
+
+    return { kind: kind as BotExtension["kind"], id: Number(id) };
+}