chore: bump project version to 1.52.0 and reformat multi-line strings across core modules

- Update pyproject.toml version from 1.51.0 to 1.52.0
- Reformat string quotes from single to double in autonomous mode extraction
- Reformat tool_results list construction and __all__ exports with consistent indentation
- Remove unused imports (time, uuid) and Spinner from assistant module
- Reformat knowledge_context search results and graph_memory dataclass definitions
- Fix missing space in KnowledgeEntry __str__ method's default parameter

CHANGELOG.md

@@ -1,6 +1,53 @@
 # Changelog
 
 
+
+
+
+## Version 1.52.0 - 2025-11-10
+
+This release updates the project version to 1.52.0. No new features or changes are introduced for users or developers.
+
+**Changes:** 1 files, 2 lines
+**Languages:** TOML (2 lines)
+
+## Version 1.51.0 - 2025-11-10
+
+The system can now extract and clean reasoning steps during task completion. Autonomous mode has been updated to recognize these reasoning steps and task completion markers, improving overall performance.
+
+**Changes:** 5 files, 65 lines
+**Languages:** Python (63 lines), TOML (2 lines)
+
+## Version 1.50.0 - 2025-11-09
+
+### Added
+- **LLM Reasoning Display**: The assistant now displays its reasoning process before each response
+  - Added `REASONING:` prefix instruction in system prompt
+  - Reasoning is extracted and displayed with a blue thought bubble icon
+  - Provides transparency into the assistant's decision-making process
+
+- **Task Completion Marker**: Implemented `[TASK_COMPLETE]` marker for explicit task completion signaling
+  - LLM can now mark tasks as complete with a special marker
+  - Marker is stripped from user-facing output
+  - Autonomous mode detection recognizes the marker for faster completion
+  - Reduces unnecessary iterations when tasks are finished
+
+### Changed
+- Updated system prompt in `context.py` to include response format instructions
+- Enhanced `process_response_autonomous()` to extract and display reasoning
+- Modified `is_task_complete()` to recognize `[TASK_COMPLETE]` marker
+- Both autonomous and regular modes now support reasoning display
+
+**Changes:** 3 files, 52 lines
+**Languages:** Python (52 lines)
+
+## Version 1.49.0 - 2025-11-09
+
+Autonomous mode is now enabled by default, improving performance. Identical messages are now removed in autonomous mode to prevent redundancy.
+
+**Changes:** 3 files, 28 lines
+**Languages:** Markdown (18 lines), Python (8 lines), TOML (2 lines)
+
 ## Version 1.48.1 - 2025-11-09
 
 ### Fixed