feat: intelligent page inference from prompt (v4.0.1)

Features:
- --pages parameter now optional with smart inference
- Auto-extract page names from prompt text
  Example: "blog with home, article pages" → ["home", "article"]
- Fallback to synthesis-specification.md in integrated mode
- Default to ["home"] if nothing specified

Changes:
- auto.md: Add Phase 0 page inference logic, update examples
- ui-generate.md: Add page inference in Phase 1, update examples
- CHANGELOG.md: Add v4.0.1 release notes with page inference

Benefits:
- Simplest command: /workflow:design:auto --prompt "Modern blog with home and article pages"
- No need to manually specify --pages in most cases
- More natural and intuitive user experience

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

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

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

@@ -1,12 +1,12 @@
 ---
 name: ui-generate
 description: Generate UI prototypes using consolidated design tokens with conventional or agent mode
-usage: /workflow:design:ui-generate --pages "<list>" [--session <id>] [--variants <count>] [--use-agent]
-argument-hint: "--pages \"dashboard,auth\" [--session WFS-xxx] [--variants 3] [--use-agent]"
+usage: /workflow:design:ui-generate [--pages "<list>"] [--session <id>] [--variants <count>] [--use-agent]
+argument-hint: "[--pages \"dashboard,auth\"] [--session WFS-xxx] [--variants 3] [--use-agent]"
 examples:
-  - /workflow:design:ui-generate --pages "login,register" --variants 2
-  - /workflow:design:ui-generate --session WFS-auth --pages "dashboard" --variants 3 --use-agent
-  - /workflow:design:ui-generate --pages "home,pricing" --variants 2
+  - /workflow:design:ui-generate --variants 2
+  - /workflow:design:ui-generate --session WFS-auth --variants 3 --use-agent
+  - /workflow:design:ui-generate --pages "home,pricing,contact" --variants 2
 allowed-tools: TodoWrite(*), Read(*), Write(*), Bash(*), Task(conceptual-planning-agent)
 ---
 
@@ -42,8 +42,19 @@ ELSE:
     # Infer session_id from existing design-session-* directory
     base_path = "./{detected_design_session}/"
 
+# Infer page list if not provided
+IF --pages provided:
+    page_list = {explicit_pages}
+ELSE IF session_mode == "integrated":
+    # Read synthesis-specification.md to extract page requirements
+    page_list = extract_pages_from_synthesis({base_path}/.brainstorming/synthesis-specification.md)
+ELSE:
+    # Infer from generated prototypes or default
+    page_list = detect_from_prototypes({base_path}/.design/prototypes/) OR ["home"]
+
+VALIDATE: page_list not empty
+
 # Set parameters
-PARSE: --pages to page_list[]
 variants_count = --variants provided ? {count} : 1
 VALIDATE: 1 <= variants_count <= 5