fix(ci): add target_commitish for Gitee release API

feat: add timeout mechanism to prevent indefinite polling in Results

- Add 60-second timeout for results polling
- Generate failed results for unprocessed questions after timeout
- Show clear timeout warnings and messages to users
- Handle race conditions between timeout and API responses
- Add English/Chinese translations for timeout messages
- Prevent indefinite waiting when processing fails

fix: resolve file conversion import error and enhance prompt examples

- Remove redundant relative import that caused ImportError when running file_conversion.py directly
- Remove debug print statement from production code
- Add descriptive message fields to all prompt examples for better feedback
- Examples now clearly explain what content was extracted and what was skipped

fix: resolve file conversion import error and enhance prompt examples

- Remove redundant relative import that caused ImportError when running file_conversion.py directly
- Remove debug print statement from production code
- Add descriptive message fields to all prompt examples for better feedback
- Examples now clearly explain what content was extracted and what was skipped

fix: Display actual student answers in multiple choice results

- Fix multiple choice results always showing 'Not answered' by setting student_answer field in GradingResult
- Add 'Get Dashscope API Key' link in settings for better UX
- Improve settings layout with proper spacing between tabs and content

chore: adjust wording in instruction and use lowercase for releases

fix: Simplifying Windows AppData path detection to avoid problematic …

…ctypes-based path retrieval

fix: Resolve Windows PyInstaller path issues and hardcoded paths

- Fix ctypes.wintypes.HRESULT compatibility for Windows executable
- Replace hardcoded paths with proper AppData directory handling
- Add fallback mechanisms for missing wintypes in PyInstaller bundles
- Ensure proper path resolution for both development and packaged environments
- Use centralized path management in file_conversion.py

This resolves two critical issues:
1. Windows executable failing to start due to missing HRESULT type
2. Hardcoded paths causing file access problems in packaged builds

fix: Make GitHub Actions release tag dynamic