fix(lint): unblock CI — add scoped eslint-disable for APIContext mocks

The 6 API/CORS test files mock the Astro APIContext by spreading
`{} as any` to satisfy fields not under test (cookies, redirect,
clientAddress, etc.). Replacing each cast individually would require
either full typed contexts (obscures tests) or 70+ inline disables.

Add one file-level `eslint-disable @typescript-eslint/no-explicit-any`
with a comment explaining the rationale to each affected file.

Production code remains lint-clean. Verified: tsc 0, lint 0,
vitest 339/339.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tests/ai-generate-api.test.ts

@@ -1,3 +1,4 @@
+/* eslint-disable @typescript-eslint/no-explicit-any -- API handlers expect a full Astro APIContext; tests provide only the fields under test and spread `{} as any` for the rest. Typing the remainder would obscure the test intent. */
 import { describe, it, expect, vi, beforeEach } from "vitest";
 
 const mockUser = {
@@ -426,4 +427,4 @@ describe("AI Generate NPC API", () => {
     expect(response.status).toBe(204);
     expect(response.headers.get("Access-Control-Allow-Origin")).toBe("https://randify.pro");
   });
-});
+});