test(api): achieve 100% coverage across all routes, middleware, and services

- Add full test suite for frontend.ts (POST /log and POST /error)
- Add error-path tests to all route handlers to cover catch blocks
  triggered by Prisma rejections
- Add non-Error throw tests to cover the `new Error(String(error))`
  ternary false branch in middleware, services, and route catch handlers
- Suppress unreachable outer catch in about.ts with v8 ignore (fetchReleases
  swallows all errors internally, making the outer catch genuinely dead code)

apps/api/test/middleware/auth.spec.ts

@@ -55,4 +55,15 @@ describe("authMiddleware", () => {
     }));
     expect(res.status).toBe(401);
   });
+
+  it("returns 401 when verifyToken throws a non-Error value", async () => {
+    const { app, verifyToken } = await makeApp();
+    vi.mocked(verifyToken).mockImplementationOnce(() => {
+      throw "raw string error";
+    });
+    const res = await app.fetch(new Request("http://localhost/test", {
+      headers: { Authorization: "Bearer bad_token" },
+    }));
+    expect(res.status).toBe(401);
+  });
 });