feat: pipeline templates, analytics opt-out, 83 conversion presets, positioning + e2e modernization

Lands five integrated branches: pipeline templates (#355), analytics opt-out (#354), 83 conversion presets bringing the catalog to 240 tools (#356), self-hosted positioning (#353), and e2e modernization (#351).

Integration fixes: aligned stale web analytics tests with the opt-out/allow-list model, closed 3 CodeQL incomplete-sanitization alerts in the i18n generator, resolved settings/index/docs/format-matrix conflicts, and corrected tool counts to 240.

tests/integration/tools/conversion-presets-smoke.test.ts

@@ -0,0 +1,41 @@
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { fixtures, readFixture } from "../../fixtures/index.js";
+import {
+  buildTestApp,
+  createMultipartPayload,
+  loginAsAdmin,
+  type TestApp,
+} from "../test-server.js";
+
+let testApp: TestApp;
+let token: string;
+
+beforeAll(async () => {
+  testApp = await buildTestApp();
+  token = await loginAsAdmin(testApp.app);
+}, 30_000);
+
+afterAll(async () => {
+  await testApp.cleanup();
+}, 10_000);
+
+describe("conversion preset smoke", () => {
+  it("jpg-to-png returns a png (fast/200)", async () => {
+    const jpg = readFixture(fixtures.image.base.jpg100);
+    const { body, contentType } = createMultipartPayload([
+      { name: "file", filename: "a.jpg", contentType: "image/jpeg", content: jpg },
+      { name: "settings", content: JSON.stringify({}) },
+    ]);
+    const res = await testApp.app.inject({
+      method: "POST",
+      url: "/api/v1/tools/image/jpg-to-png",
+      headers: { authorization: `Bearer ${token}`, "content-type": contentType },
+      body,
+    });
+    expect([200, 202]).toContain(res.statusCode);
+    if (res.statusCode === 200) {
+      const json = JSON.parse(res.body);
+      expect(json.downloadUrl).toMatch(/\.png$/);
+    }
+  });
+});