Address PR #1229 code review feedback

- ToolsScreen.fixtures.ts: replace empty `{}` schemas in query_database
  params and post_request body with explicit `type` for consistency
- ToolControls WithSearch story: add play function that types "git" so
  the story actually demonstrates filtering
- ResourcesScreen stories: comment expandUserProfileTemplate to document
  the userId/readUserProfileState.uri coupling

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

clients/web/src/components/screens/ToolsScreen/ToolsScreen.fixtures.ts

@@ -103,7 +103,7 @@ export const longToolList: Tool[] = [
         params: {
           type: "array",
           description: "Positional bind parameters",
-          items: {},
+          items: { type: "string" },
         },
         limit: { type: "number" },
       },
@@ -269,7 +269,7 @@ export const longToolList: Tool[] = [
       type: "object",
       properties: {
         url: { type: "string" },
-        body: {},
+        body: { type: "object", description: "JSON request body" },
         headers: { type: "object" },
       },
       required: ["url", "body"],