feat: Add ollama thinking feature (#275)

docs/ollama-configuration.md

@@ -28,6 +28,44 @@ ollama run qwen2.5-coder:32b
 
 You're all set! QodeAssist is now ready to use in Qt Creator.
 
+## Extended Thinking Mode
+
+Ollama supports extended thinking mode for models that are capable of deep reasoning (such as DeepSeek-R1, QwQ, and similar reasoning models). This mode allows the model to show its step-by-step reasoning process before providing the final answer.
+
+### How to Enable
+
+**For Chat Assistant:**
+1. Navigate to Qt Creator > Preferences > QodeAssist > Chat Assistant
+2. In the "Extended Thinking (Claude, Ollama)" section, check "Enable extended thinking mode"
+3. Select a reasoning-capable model (e.g., deepseek-r1:8b, qwq:32b)
+4. Click Apply
+
+**For Quick Refactoring:**
+1. Navigate to Qt Creator > Preferences > QodeAssist > Quick Refactor
+2. Check "Enable Thinking Mode"
+3. Configure thinking budget and max tokens as needed
+4. Click Apply
+
+### Supported Models
+
+Thinking mode works best with models specifically designed for reasoning:
+- **DeepSeek-R1** series (deepseek-r1:8b, deepseek-r1:14b, deepseek-r1:32b)
+- **QwQ** series (qwq:32b)
+- Other models trained for chain-of-thought reasoning
+
+### How It Works
+
+When thinking mode is enabled:
+1. The model generates internal reasoning (visible in the chat as "Thinking" blocks)
+2. After reasoning, it provides the final answer
+3. You can collapse/expand thinking blocks to focus on the final answer
+4. Temperature is automatically set to 1.0 for optimal reasoning performance
+
+**Technical Details:**
+- Thinking mode adds the `enable_thinking: true` parameter to requests sent to Ollama
+- This is natively supported by the Ollama API for compatible models
+- Works in both Chat Assistant and Quick Refactoring contexts
+
 <details>
   <summary>Example of Ollama settings: (click to expand)</summary>