Implement full NFC-URL streaming architecture

- rc522: add NDEF URL reading via WUPA+cascade anticoll+SELECT+TLV parse
- AudioPlayer: route http:// URIs to esp_player_http_music_play()
- CacheManager: download URLs async to /sdcard/cache/{hash}.{ext}
- TagPlayerControl: NDEF URL → cache-or-stream; fallback to UID local mapping
- RFIDInterface: wire ndef_callback, expose combined uid+url callback
- WebInterface: add /api/info, /api/storage, /api/playback, /api/bluetooth
- BluetoothInterface: stub for A2DP speaker mode
- Networking: WiFi connect with 30s timeout instead of blocking forever
- main.cpp: re-enable WiFi + web server, fix init order, add CacheManager
- www/: full SPA — playback controls, device info, storage, BT pairing
- .gitmodules: switch rc522 submodule URL to HTTPS

https://claude.ai/code/session_01MhAnh68DPNnTjcKqjNYDmk

device/main/CMakeLists.txt

@@ -1,2 +1,12 @@
-idf_component_register(SRCS "Networking.cpp" "main.cpp" "WebInterface.cpp" "RFIDInterface.cpp" "audio_setup.c" "AudioPlayer.cpp" "TagPlayerControl.cpp"
-    INCLUDE_DIRS ".")
+idf_component_register(SRCS
+        "main.cpp"
+        "Networking.cpp"
+        "WebInterface.cpp"
+        "RFIDInterface.cpp"
+        "AudioPlayer.cpp"
+        "TagPlayerControl.cpp"
+        "CacheManager.cpp"
+        "BluetoothInterface.cpp"
+        "audio_setup.c"
+    INCLUDE_DIRS "."
+    REQUIRES esp_http_client esp_netif)