ai: Oh, alright then.

* Allow users to full control of chat settings.

* Add new model:
- GPT-5 (Nano)
- Gemini 2.5 Flash Lite

* Remove some model (public usage).

* Bring back DeepSeek R1 from Pollinations.

* Updated docker image (not here).

src/database/webui.db

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:ba021036049008ae9cbad5e649ebb57bc085ec049b1b8fdac1c12b1c4c5ab24d
+oid sha256:a69bca9badf0df533af496629aee7a691c924a0085d87687d54cb25e2a6c0c48
 size 9211904