Add iOS app, SvelteKit JSON API endpoints, and Gitea CI workflow

- iOS SwiftUI app (ios/LibNovel/) targeting iOS 17+, generated via xcodegen
  - Full feature set: auth, home, library, book detail, chapter reader, browse, audio player, profile
  - Kingfisher for image loading, swift-markdown-ui for chapter rendering
  - Base URL: https://v2.libnovel.kalekber.cc
- SvelteKit JSON API routes (ui/src/routes/api/) for iOS consumption:
  auth/login, auth/register, auth/me, auth/logout, auth/change-password,
  home, library, book/[slug], chapter/[slug]/[n], search, ranking,
  progress/[slug], presign/audio (updated)
- Gitea Actions CI: .gitea/workflows/ios.yaml (build + test on macos-latest)
- justfile: ios-gen, ios-build, ios-test recipes

justfile

@@ -3,6 +3,7 @@
 
 scraper_dir := "scraper"
 ui_dir      := "ui"
+ios_dir     := "ios/LibNovel"
 
 # ─── Build ────────────────────────────────────────────────────────────────────
 
@@ -78,6 +79,30 @@ ui-install:
 ui-build:
     cd {{ui_dir}} && npm run build
 
+# ─── iOS ──────────────────────────────────────────────────────────────────────
+
+# Regenerate LibNovel.xcodeproj from project.yml (run after structural changes)
+ios-gen:
+    cd {{ios_dir}} && xcodegen generate --spec project.yml --project .
+
+# Build the iOS app for the simulator (no signing required)
+ios-build: ios-gen
+    cd {{ios_dir}} && xcodebuild \
+        -project LibNovel.xcodeproj \
+        -scheme LibNovel \
+        -configuration Debug \
+        -destination 'generic/platform=iOS Simulator' \
+        CODE_SIGNING_ALLOWED=NO
+
+# Run unit tests on the simulator
+ios-test: ios-gen
+    cd {{ios_dir}} && xcodebuild test \
+        -project LibNovel.xcodeproj \
+        -scheme LibNovel \
+        -configuration Debug \
+        -destination 'platform=iOS Simulator,name=iPhone 17' \
+        CODE_SIGNING_ALLOWED=NO
+
 # ─── Docker Compose ───────────────────────────────────────────────────────────
 
 # Start all services (browserless, kokoro, scraper, minio, pocketbase)