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/services/webhook.spec.ts

@@ -69,6 +69,15 @@ describe("webhook service", () => {
       const { grantApotheosisRole } = await import("../../src/services/webhook.js");
       await expect(grantApotheosisRole("user")).resolves.toBeUndefined();
     });
+
+    it("swallows non-Error fetch rejections gracefully", async () => {
+      process.env["DISCORD_BOT_TOKEN"] = "tok";
+      process.env["DISCORD_GUILD_ID"] = "g";
+      process.env["DISCORD_APOTHEOSIS_ROLE_ID"] = "r";
+      mockFetch.mockRejectedValueOnce("raw string error");
+      const { grantApotheosisRole } = await import("../../src/services/webhook.js");
+      await expect(grantApotheosisRole("user")).resolves.toBeUndefined();
+    });
   });
 
   describe("postMilestoneWebhook", () => {
@@ -119,5 +128,12 @@ describe("webhook service", () => {
       const { postMilestoneWebhook } = await import("../../src/services/webhook.js");
       await expect(postMilestoneWebhook("user", "prestige", counts)).resolves.toBeUndefined();
     });
+
+    it("swallows non-Error fetch rejections gracefully", async () => {
+      process.env["DISCORD_MILESTONE_WEBHOOK"] = "https://discord.com/webhook/abc";
+      mockFetch.mockRejectedValueOnce("raw string error");
+      const { postMilestoneWebhook } = await import("../../src/services/webhook.js");
+      await expect(postMilestoneWebhook("user", "prestige", counts)).resolves.toBeUndefined();
+    });
   });
 });