refactor: standardize UI design workflow folder naming and add absolute path conversion

Unified folder naming format across all UI design commands:
- Session mode: .workflow/WFS-{session}/design-run-YYYYMMDD-RANDOM
- Standalone mode: .workflow/.design/design-run-YYYYMMDD-RANDOM

Key changes:
- Standardized run directory naming to design-run-* format
- Added absolute path conversion for all base_path variables
- Updated path discovery patterns from design-* to design-run-*
- Maintained backward compatibility for existing directory discovery

Modified commands (10 files):
- explore-auto.md, imitate-auto.md: Unified standalone path format
- explore-layers.md: Changed from design-layers-* to design-run-*
- capture.md: Added design- prefix to standalone mode
- animation-extract.md, style-extract.md, layout-extract.md,
  generate.md, batch-generate.md: Added absolute path conversion
- update.md: Updated path discovery pattern

Technical improvements:
- Eliminates path ambiguity between command and agent execution contexts
- Ensures all file operations use absolute paths for reliability
- Provides consistent directory structure across workflows

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

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

.claude/commands/workflow/ui-design/generate.md

@@ -25,11 +25,17 @@ Pure assembler that combines pre-extracted layout templates with design tokens t
 
 ### Step 1: Resolve Base Path & Parse Configuration
 ```bash
-# Determine working directory
-bash(find .workflow -type d -name "design-*" | head -1)  # Auto-detect
+# Determine working directory (relative path)
+relative_path=$(find .workflow -type d -name "design-run-*" | head -1)
+
+# Convert to absolute path
+base_path=$(cd "$relative_path" && pwd)
+
+# Verify absolute path
+bash(test -d "$base_path" && echo "✓ Base path: $base_path" || echo "✗ Path not found")
 
 # Get style count
-bash(ls {base_path}/style-extraction/style-* -d | wc -l)
+bash(ls "$base_path"/style-extraction/style-* -d | wc -l)
 
 # Image reference auto-detected from layout template source_image_path
 ```
@@ -263,7 +269,7 @@ Next: /workflow:ui-design:update
 ### Path Operations
 ```bash
 # Find design directory
-bash(find .workflow -type d -name "design-*" | head -1)
+bash(find .workflow -type d -name "design-run-*" | head -1)
 
 # Count style variants
 bash(ls {base_path}/style-extraction/style-* -d | wc -l)