feat: request a tool when home search finds nothing (#385)

Adds a prefilled 'Request a tool' affordance to the home search empty state and beneath weak results. Opens the in-app feedback dialog with a new search_miss source and a structured search_query when analytics is on; links to a prefilled GitHub Discussions (Ideas) post when off, so a request is never silently dropped. Reuses the existing feedback pipe, dialog, and analytics gate; no new storage. i18n across all 21 locales.

tests/e2e/search-miss-request.spec.ts

@@ -0,0 +1,53 @@
+import { expect, test } from "@playwright/test";
+
+test.describe("search-miss tool request", () => {
+  test("offers a request when a search finds nothing", async ({ page }) => {
+    await page.goto("/");
+
+    const searchInput = page.locator("[data-search-input]");
+    await expect(searchInput).toBeVisible();
+    await searchInput.fill("zzxqwv nonexistent capability");
+
+    const request = page.getByTestId("request-tool").first();
+    await expect(request).toBeVisible();
+
+    const href = await request.getAttribute("href");
+    if (href) {
+      expect(href).toContain("/discussions/new");
+      expect(href).toContain("category=ideas");
+    } else {
+      await request.click();
+      const dialog = page.getByRole("dialog");
+      await expect(dialog).toBeVisible();
+      await expect(dialog).toContainText("Request a tool");
+    }
+  });
+
+  test("opens the in-app request dialog when analytics is enabled", async ({ page }) => {
+    // Force the client to see analytics as enabled so the affordance renders as an
+    // in-app dialog trigger instead of a Discussions link. Merge with the real
+    // config response so unrelated fields stay intact.
+    await page.route("**/api/v1/config/analytics", async (route) => {
+      const response = await route.fetch();
+      const body = await response.json();
+      await route.fulfill({ json: { ...body, enabled: true } });
+    });
+
+    await page.goto("/");
+
+    const searchInput = page.locator("[data-search-input]");
+    await expect(searchInput).toBeVisible();
+    await searchInput.fill("zzxqwv nonexistent capability");
+
+    const request = page.getByTestId("request-tool").first();
+    await expect(request).toBeVisible();
+    // With analytics "on" the affordance is a button (no href) that opens the dialog.
+    await expect(request).not.toHaveAttribute("href", /.+/);
+    await request.click();
+
+    const dialog = page.getByRole("dialog");
+    await expect(dialog).toBeVisible();
+    await expect(dialog).toContainText("Request a tool");
+    await expect(dialog).toContainText("zzxqwv nonexistent capability");
+  });
+});