refactor: unify UI design workflow target parameters for pages and components

Consolidate separate page/component modes into a unified target system to
reduce code duplication and simplify the workflow parameter model.

Changes:
- Merge --pages and --components into unified --targets parameter
- Add --target-type (auto|page|component) with intelligent detection
- Remove Phase 0d from explore-auto.md (131 lines of duplicate logic)
- Implement detect_target_type() helper for automatic classification
- Update generate.md to support adaptive wrapper generation
  - Full HTML structure for pages
  - Minimal wrapper for isolated components
- Update imitate-auto.md and update.md for parameter consistency
- Enhance ui-design-agent.md with adaptive design capabilities
- Maintain full backward compatibility with legacy syntax

Benefits:
- Code reduction: -35% in target inference logic (255 → 165 lines)
- Maintenance: Single unified logic path vs dual implementations
- Extensibility: Foundation for future mixed-mode support
- UX: Simpler parameter model with automatic type detection

Technical Details:
- explore-auto.md: 605 lines changed (unified Phase 0c)
- generate.md: 353 lines changed (targets + adaptive wrapper)
- Net change: +685 insertions, -504 deletions across 5 files

All existing workflows remain compatible via legacy parameter support.

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

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

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

@@ -32,11 +32,29 @@ VALIDATE: session_id matches active session
 
 # Verify required design artifacts exist in latest design run
 latest_design = find_latest_path_matching(".workflow/WFS-{session}/design-*")
+
+# Detect design system structure (unified vs separate)
+IF exists({latest_design}/style-consolidation/design-tokens.json):
+    # Unified mode (single design system)
+    design_system_mode = "unified"
+    design_tokens_path = "style-consolidation/design-tokens.json"
+    style_guide_path = "style-consolidation/style-guide.md"
+ELSE IF exists({latest_design}/style-consolidation/style-1/design-tokens.json):
+    # Separate mode (per-style design systems)
+    design_system_mode = "separate"
+    design_tokens_path = "style-consolidation/style-1/design-tokens.json"
+    style_guide_path = "style-consolidation/style-1/style-guide.md"
+ELSE:
+    ERROR: "No design tokens found. Run /workflow:ui-design:consolidate first"
+
 VERIFY:
-- {latest_design}/style-consolidation/design-tokens.json
-- {latest_design}/style-consolidation/style-guide.md
+- {latest_design}/{design_tokens_path}
+- {latest_design}/{style_guide_path}
 - {latest_design}/prototypes/*.html (at least one prototype)
 
+REPORT: "📋 Design system mode: {design_system_mode}"
+REPORT: "   Tokens: {design_tokens_path}"
+
 # Prototype selection
 IF --selected-prototypes provided:
     VALIDATE: Specified prototypes exist
@@ -76,8 +94,9 @@ Update `.brainstorming/synthesis-specification.md` with design system references
 ## UI/UX Guidelines
 
 ### Design System Reference
-**Finalized Design Tokens**: @../design-{run_id}/style-consolidation/design-tokens.json
-**Style Guide**: @../design-{run_id}/style-consolidation/style-guide.md
+**Finalized Design Tokens**: @../design-{run_id}/{design_tokens_path}
+**Style Guide**: @../design-{run_id}/{style_guide_path}
+**Design System Mode**: {design_system_mode}
 
 ### Implementation Requirements
 **Token Adherence**: All UI implementations MUST use design token CSS custom properties
@@ -94,8 +113,9 @@ Update `.brainstorming/synthesis-specification.md` with design system references
 ### Design System Assets
 ```json
 {
-  "design_tokens": "design-{run_id}/style-consolidation/design-tokens.json",
-  "style_guide": "design-{run_id}/style-consolidation/style-guide.md",
+  "design_tokens": "design-{run_id}/{design_tokens_path}",
+  "style_guide": "design-{run_id}/{style_guide_path}",
+  "design_system_mode": "{design_system_mode}",
   "prototypes": [
     {FOR each: "design-{run_id}/prototypes/{prototype}.html"}
   ]
@@ -131,8 +151,9 @@ Create or update `.brainstorming/ui-designer/style-guide.md`:
 ## Design System Integration
 This style guide references the finalized design system from the design refinement phase.
 
-**Design Tokens**: @../../design-{run_id}/style-consolidation/design-tokens.json
-**Style Guide**: @../../design-{run_id}/style-consolidation/style-guide.md
+**Design Tokens**: @../../design-{run_id}/{design_tokens_path}
+**Style Guide**: @../../design-{run_id}/{style_guide_path}
+**Design System Mode**: {design_system_mode}
 
 ## Implementation Guidelines
 1. **Use CSS Custom Properties**: All styles reference design tokens
@@ -147,8 +168,8 @@ This style guide references the finalized design system from the design refineme
 
 ## Token System
 For complete token definitions and usage examples, see:
-- Design Tokens: @../../design-{run_id}/style-consolidation/design-tokens.json
-- Style Guide: @../../design-{run_id}/style-consolidation/style-guide.md
+- Design Tokens: @../../design-{run_id}/{design_tokens_path}
+- Style Guide: @../../design-{run_id}/{style_guide_path}
 
 ---
 *Auto-generated by /workflow:ui-design:update*