refactor(aisidebar): restructure project and implement reasoning mode toggle

- Reorganize project structure and file locations
- Add ReasoningController to manage model selection and reasoning mode
- Update design and requirements for reasoning mode toggle
- Implement model switching between Qwen3-4B-Instruct and Qwen3-4B-Thinking models
- Remove deprecated files and consolidate project layout
- Add new steering and specification documentation
- Clean up and remove unnecessary files and directories
- Prepare for enhanced AI sidebar functionality with more flexible model handling

README.md

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+## AI Sidebar for Ignis
+
+A sleek AI chat sidebar that integrates with your Ignis desktop, sliding in from the left side with Ollama AI integration.
+
+### Features
+
+- **Slide-in Animation**: Smoothly slides in from the left side (opposite of QuickCenter)
+- **Ollama Integration**: Chat with local AI models via Ollama
+- **Conversation Persistence**: Your conversations are automatically saved and restored
+- **Material Design 3**: Matches your existing Ignis theme perfectly
+- **Keyboard Toggle**: Bind a key to toggle the sidebar visibility
+
+### How to Use
+
+#### Open/Close the Sidebar
+
+You can toggle the sidebar using:
+1. **Python/Script**: Call `window_manager.toggle_window("AISidebar")`
+2. **Keyboard Shortcut**: Add a binding in your window manager config
+
+#### Setting up a Keyboard Shortcut
+
+For **Niri**, add this to your `~/.config/niri/config.kdl`:
+
+```kdl
+binds {
+    // ... your other bindings
+
+    // Toggle AI Sidebar with Super+G (or any key you prefer)
+    Mod+G { spawn "ignis" "run" "ignis.window_manager.WindowManager.get_default().toggle_window('AISidebar')"; }
+}
+```
+
+For **Hyprland**, add this to your `~/.config/hypr/hyprland.conf`:
+
+```conf
+# Toggle AI Sidebar with Super+G
+bind = SUPER, G, exec, ignis run "ignis.window_manager.WindowManager.get_default().toggle_window('AISidebar')"
+```
+
+For **Sway**, add this to your `~/.config/sway/config`:
+
+```
+# Toggle AI Sidebar with Super+G
+bindsym $mod+G exec ignis run "ignis.window_manager.WindowManager.get_default().toggle_window('AISidebar')"
+```
+
+### Requirements
+
+- **Ignis** desktop environment
+- **Python 3.10+**
+- **Ollama** with at least one model installed
+- **ollama Python package**: `pip install ollama`
+
+### Configuration
+
+The sidebar will automatically:
+- Detect your default Ollama model
+- Store conversations in `~/.config/ignis/modules/aisidebar/data/conversations/`
+- Apply your current Ignis theme colors
+
+### Customization
+
+#### Change Width
+
+Edit `aisidebar.py` line 19:
+```python
+self.content_box.width_request = 400  # Change to desired width
+```
+
+#### Change Animation Speed
+
+Edit `aisidebar.py` line 24:
+```python
+transition_duration=300,  # Change to desired milliseconds
+```
+
+#### Custom CSS Styling
+
+Edit `~/.config/ignis/styles/aisidebar.scss` to customize:
+- Colors (uses Material Design 3 color tokens)
+- Border radius
+- Padding/margins
+- Message bubble styling
+
+### Troubleshooting
+
+**Sidebar doesn't appear:**
+- Restart Ignis: `ignis reload`
+- Check Ollama is running: `curl http://127.0.0.1:11434/api/tags`
+- Check console for errors: `ignis`
+
+**No AI responses:**
+- Ensure Ollama is running
+- Ensure `ollama` Python package is installed in Ignis's Python environment
+- Check that you have at least one model: `ollama list`
+
+**CSS not applying:**
+- Restart Ignis: `ignis reload`
+- Check SCSS compilation: Look for errors in Ignis console output
+
+### Architecture
+
+```
+~/.config/ignis/modules/aisidebar/
+├── __init__.py              # Module exports
+├── aisidebar.py             # Main RevealerWindow class
+├── chat_widget.py           # Chat UI widget
+├── ollama_client.py         # Ollama API wrapper
+├── conversation_manager.py  # Conversation persistence
+└── data/
+    └── conversations/       # Saved conversations (auto-created)
+```
+
+### Visual Design
+
+The AI Sidebar follows the same visual language as QuickCenter:
+- Material Design 3 color system
+- 20px border radius on container
+- Surface elevation with shadows
+- Smooth slide-in transitions
+- Translucent overlay backdrop
+
+Clicking outside the sidebar will close it (same as QuickCenter behavior).