docs(docs): update documentation with new streaming features and performance plans

- Remove obsolete standalone feature docs and integrate their summaries into docs organization
- Add media streaming features including external player auto-launch and .ts file handling fixes
- Document FFmpeg process management and progress bar fixes in media streaming-root section
- Introduce comprehensive 5-phase performance optimization plan with API pagination and virtual scrolling
- Update feature status to reflect completion and planning states of media streaming and performance features
- Enhance README with additional streaming capabilities and forthcoming performance improvements
- Reorganize active documentation categories for clearer navigation and categorization

docs/DOCUMENTATION_ORGANIZATION.md

@@ -41,6 +41,15 @@
 - `IMPLEMENTATION_COMPLETE.md` - Overall implementation status
 - `IMPLEMENTATION_TASKS.md` - Task tracking
 
+#### **Additional Media Streaming Features** ✅ COMPLETE
+- `PLAYER_AUTO_LAUNCH_FEATURE.md` - External player auto-launch system
+- `TEMP_TS_FIX.md` - Temporary .ts file handling fix
+- `TRANSCODING_FIXES.md` - FFmpeg process management and progress bar fixes
+
+#### **Performance Optimization** ✅ PLANNING COMPLETE
+- `GEMINI.md` - Comprehensive 5-phase performance optimization plan
+- `PRD.md` - Product requirements with performance optimization (duplicate of GEMINI.md)
+
 ### **Planning & Enhancement Documentation**
 
 #### **Future Enhancements** 📋 PLANNED
@@ -140,15 +149,17 @@ docs/
 ├── README.md                          # Main navigation hub
 ├── FEATURE_STATUS.md                  # Current feature status
 ├── active/                           # Current features
-│   ├── library-clusters/             # Library cluster docs
-│   ├── media-streaming/              # Streaming & format docs
-│   ├── recommendations/              # Surprise Me docs
-│   └── fixes-enhancements/           # Recent fixes
+│   ├── library-clusters/             # Library cluster docs (12)
+│   ├── media-streaming/              # Core streaming docs (8)
+│   ├── media-streaming-root/         # Additional streaming (3)
+│   ├── recommendations/              # Surprise Me docs (6)
+│   ├── fixes-enhancements/           # Recent fixes (4)
+│   └── performance/                  # Performance plans (2)
 ├── planning/                         # Future enhancements
 │   └── artplayer-enhancement.md
 ├── archive/                          # Historical docs
-│   ├── transcoding-legacy/           # Removed features
-│   └── deployment-legacy/            # Old deployment info
+│   ├── transcoding-legacy/           # Removed features (5)
+│   └── deployment-legacy/            # Old deployment info (2)
 └── guides/                           # User & dev guides
     ├── user-guide.md
     ├── deployment-guide.md

docs/FEATURE_STATUS.md

@@ -42,9 +42,23 @@
   - Local player launcher
   - Bookmark/rating within player
   - Format detection and fallback
-- **Documentation**: `active/fixes-enhancements/`
+  - Auto-launch with user preferences
+- **Documentation**: `active/fixes-enhancements/` and `active/media-streaming-root/`
 - **Last Updated**: 2025-10-12
 
+### **5. Performance Optimization** ✅ **PLANNING COMPLETE**
+- **Status**: 5-phase optimization plan documented and ready
+- **Features**:
+  - API pagination for large datasets
+  - Virtual scrolling implementation
+  - Database indexing optimization
+  - Connection pooling strategies
+  - Multi-level caching architecture
+- **Documentation**: `active/performance/`
+- **Priority**: P0 (Critical) - API pagination + virtual scrolling
+- **Target**: Support 50,000+ files efficiently
+- **Last Updated**: 2025-10-13
+
 ## 🟡 **Partially Implemented Features**
 
 ### **5. Surprise Me Recommendations** ⚠️ **MVP READY**
@@ -87,8 +101,10 @@ docs/
 ├── active/                       # Current features
 │   ├── library-clusters/         # 12 documents
 │   ├── media-streaming/          # 8 documents  
+│   ├── media-streaming-root/     # 3 documents (additional features)
 │   ├── recommendations/          # 6 documents
-│   └── fixes-enhancements/       # 4 documents
+│   ├── fixes-enhancements/       # 4 documents
+│   └── performance/              # 2 documents
 ├── planning/                     # Future enhancements
 │   └── artplayer-enhancement.md
 ├── archive/                      # Historical docs

docs/README.md

@@ -16,9 +16,10 @@ Comprehensive media organization with clusters
 
 #### **Media Streaming & Format Support**
 Zero-transcoding media streaming with local player fallback
-- 📁 [`active/media-streaming/`](active/media-streaming/) - Technical documentation
+- 📁 [`active/media-streaming/`](active/media-streaming/) - Core streaming documentation
+- 📁 [`active/media-streaming-root/`](active/media-streaming-root/) - Additional streaming features
 - ✅ **Status**: Production ready  
-- 🎯 **Features**: Direct streaming, format detection, local player integration
+- 🎯 **Features**: Direct streaming, format detection, local player integration, auto-launch, transcoding fixes
 
 #### **Surprise Me Recommendations**
 Intelligent content discovery system
@@ -32,6 +33,12 @@ Latest improvements and bug fixes
 - ✅ **Status**: Implemented and tested
 - 🎯 **Features**: Auto-close fixes, migration guides, implementation tracking
 
+#### **Performance Optimization**
+Systematic performance improvements for large datasets
+- 📁 [`active/performance/`](active/performance/) - Performance documentation
+- ✅ **Status**: Implementation planning complete
+- 🎯 **Features**: API pagination, virtual scrolling, database optimization, caching strategy
+
 ### **🟡 Planned Features**
 - 📁 [`planning/`](planning/) - Future enhancements
 - 🎯 **ArtPlayer Enhancement**: Direct playback optimization (1 document)