fix(web): rename route-colocated test to avoid +page.* collision

+page.test.ts triggered svelte-kit sync's route walker (which treats
any +-prefixed file as a route). Renaming to login.test.ts lets the
sync pass without disabling it in scripts, preserving the upstream
guarantee that types in .svelte-kit/ are fresh before check/test.

Plan bug introduced in Task 10 (filename chosen in the plan); fixing
here and updating the plan so re-runs use the correct name.

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

web/package.json

@@ -7,9 +7,8 @@
     "dev": "vite dev",
     "build": "vite build",
     "preview": "vite preview",
-    "sync": "svelte-kit sync",
-    "check": "svelte-check --tsconfig ./tsconfig.json",
-    "test": "vitest run"
+    "check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
+    "test": "svelte-kit sync && vitest run"
   },
   "devDependencies": {
     "@sveltejs/adapter-static": "^3.0.6",