Octech2722 57c155ea3f docs: add architecture and migration pattern documentation
Architecture Documentation:
- System component overview (logging, theme, build)
- Content processing pipeline details
- File structure and organization
- Message flow diagrams
- Storage strategy (local vs sync)
- MV3 constraints and solutions

Migration Patterns:
- 8 common MV2 → MV3 migration patterns
- TypeScript examples with proper error handling
- Chrome API usage examples
- Best practices for each scenario

Serves as reference to avoid re-explaining systems repeatedly.
2025-10-18 12:17:38 -05:00
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