Update docs, skill counts, and UX/setup-engine skills for v0.4.0

- Update skill count to 66 and hook count to 12 across README, skills-reference, and badges
- Add QA & Testing section to README and skills-reference (qa-plan, smoke-check, soak-test, etc.)
- Add Input & Platform section to technical-preferences.md (populated by /setup-engine)
- Document post-compact, notify, and validate-skill-change hooks in hooks-reference
- Expand /setup-engine, /ux-design, /ux-review, /design-system skills with input/platform context
- Restructure workflow-catalog: move UX steps into pre-production phase, improve descriptions
- Expand UPGRADING.md and WORKFLOW-GUIDE.md with v0.4.0 guidance
- Add skill-flow-diagrams examples and CODEOWNERS

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.claude/docs/workflow-catalog.yaml

@@ -86,7 +86,7 @@ phases:
 
   technical-setup:
     label: "Technical Setup"
-    description: "Architecture decisions, UX foundations, engine validation"
+    description: "Architecture decisions, accessibility foundations, engine validation"
     next_phase: pre-production
     steps:
       - id: create-architecture
@@ -128,8 +128,13 @@ phases:
         required: true
         artifact:
           glob: "design/accessibility-requirements.md"
-        description: "Commit accessibility tier (Basic/Standard/Comprehensive/Exemplary) and feature matrix"
+        description: "Commit accessibility tier (Basic/Standard/Comprehensive/Exemplary) and feature matrix. UX specs (Phase 4) reference this tier."
 
+  pre-production:
+    label: "Pre-Production"
+    description: "UX specs, prototype the core mechanic, define stories, validate fun"
+    next_phase: production
+    steps:
       - id: ux-design
         name: "UX Specs (key screens)"
         command: /ux-design
@@ -138,19 +143,14 @@ phases:
         artifact:
           glob: "design/ux/*.md"
           min_count: 1
-        description: "Author UX specs for main menu, core gameplay HUD, and pause screen"
+        description: "Author UX specs for main menu, core gameplay HUD, and interaction patterns. Reads input method and platform from technical-preferences.md."
 
       - id: ux-review
         name: "UX Review"
         command: /ux-review
         required: true
-        description: "Validate all key screen UX specs for accessibility and GDD alignment"
+        description: "Validate all key screen UX specs for GDD alignment and accessibility tier compliance. Run before creating epics."
 
-  pre-production:
-    label: "Pre-Production"
-    description: "Prototype the core mechanic, define stories, validate fun"
-    next_phase: production
-    steps:
       - id: prototype
         name: "Prototype"
         command: /prototype