chore: project cleanup and prepare for dual-track processing refactor

- Removed all test files and directories
- Deleted outdated documentation (will be rewritten)
- Cleaned up temporary files, logs, and uploads
- Archived 5 completed OpenSpec proposals
- Created new dual-track-document-processing proposal with complete OpenSpec structure
  - Dual-track architecture: OCR track (PaddleOCR) + Direct track (PyMuPDF)
  - UnifiedDocument model for consistent output
  - Support for structure-preserving translation
- Updated .gitignore to prevent future test/temp files

This is a major cleanup preparing for the complete refactoring of the document processing pipeline.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

openspec/changes/archive/2025-11-18-add-gpu-acceleration-support/specs/environment-setup/spec.md

@@ -0,0 +1,77 @@
+# Environment Setup Specification
+
+## ADDED Requirements
+
+### Requirement: GPU Detection and CUDA Installation
+The system SHALL automatically detect compatible GPU hardware during environment setup and install appropriate PaddlePaddle packages (GPU-enabled or CPU-only) based on hardware availability.
+
+#### Scenario: GPU detected with CUDA support
+- **WHEN** setup script runs on system with NVIDIA GPU and CUDA drivers
+- **THEN** the script detects GPU using `nvidia-smi` command
+- **AND** determines CUDA version from driver
+- **AND** installs `paddlepaddle-gpu` with matching CUDA version
+- **AND** verifies GPU availability through Python
+- **AND** displays GPU information (device name, CUDA version, memory)
+
+#### Scenario: No GPU detected
+- **WHEN** setup script runs on system without compatible GPU
+- **THEN** the script detects absence of GPU hardware
+- **AND** installs CPU-only `paddlepaddle` package
+- **AND** displays message that CPU mode will be used
+- **AND** continues setup without errors
+
+#### Scenario: GPU detected but no CUDA drivers
+- **WHEN** setup script detects NVIDIA GPU but CUDA drivers are missing
+- **THEN** the script displays warning about missing drivers
+- **AND** provides installation instructions for CUDA drivers
+- **AND** falls back to CPU-only installation
+- **AND** suggests re-running setup after driver installation
+
+#### Scenario: CUDA version mismatch
+- **WHEN** detected CUDA version is not compatible with available PaddlePaddle packages
+- **THEN** the script displays available CUDA versions
+- **AND** installs closest compatible PaddlePaddle GPU package
+- **AND** warns user about potential compatibility issues
+- **AND** provides instructions to upgrade/downgrade CUDA if needed
+
+#### Scenario: Manual CUDA version override
+- **WHEN** user sets CUDA_VERSION environment variable before running setup
+- **THEN** the script uses specified CUDA version instead of auto-detection
+- **AND** installs corresponding PaddlePaddle GPU package
+- **AND** skips automatic CUDA detection
+- **AND** displays warning if specified version differs from detected version
+
+### Requirement: GPU Verification
+The system SHALL verify GPU functionality after installation and provide clear status reporting.
+
+#### Scenario: Successful GPU setup verification
+- **WHEN** PaddlePaddle GPU installation completes
+- **THEN** the script runs GPU availability test using Python
+- **AND** confirms CUDA devices are accessible
+- **AND** displays GPU count, device names, and memory capacity
+- **AND** marks GPU setup as successful
+
+#### Scenario: GPU verification fails
+- **WHEN** GPU verification test fails after installation
+- **THEN** the script displays detailed error message
+- **AND** provides troubleshooting steps
+- **AND** suggests fallback to CPU mode
+- **AND** does not fail entire setup process
+
+### Requirement: Environment Configuration for GPU
+The system SHALL create appropriate configuration settings for GPU usage in environment files.
+
+#### Scenario: GPU-enabled configuration
+- **WHEN** GPU is successfully detected and verified
+- **THEN** the setup script adds GPU settings to `.env.local`
+- **AND** sets `FORCE_CPU_MODE=false`
+- **AND** sets detected `CUDA_VERSION`
+- **AND** sets recommended `GPU_MEMORY_FRACTION` (e.g., 0.8)
+- **AND** adds GPU-related comments and documentation
+
+#### Scenario: CPU-only configuration
+- **WHEN** no GPU is detected or verification fails
+- **THEN** the setup script creates CPU-only configuration
+- **AND** sets `FORCE_CPU_MODE=true`
+- **AND** omits or comments out GPU-specific settings
+- **AND** adds note about GPU requirements