feat: add Ollama (local AI) integration for AIUI

- Create Ollama provider plugin in AIUI (ollama-provider.ts)
- Register Ollama alongside Claude in plugin system
- Auto-detect installed models via /api/tags endpoint
- Add Ollama proxy in mock backend (forwards to localhost:11434)
- Add nginx proxy rules for /aiui/api/ollama/ (both HTTP and HTTPS)
- Rebuild AIUI dist with Ollama provider included
- Qwen 2.5 Coder 3B installed on dev server via Ollama

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

demo/aiui/assets/FilmGrid-Bxr1_fiQ.js

@@ -0,0 +1 @@
+import{_ as o}from"./FilmGrid.vue_vue_type_script_setup_true_lang-Cv6-zNyf.js";import"./index-BD9qoze1.js";import"./useContentImages-6RAIPaCD.js";export{o as default};