refactor: rename qa-design-review → design-review

The "qa-" prefix was confusing — this is the live-site design audit with
fix loop, not a QA-only report. Rename directory and update all references
across docs, tests, scripts, and skill templates.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/gen-skill-docs.ts

@@ -541,7 +541,7 @@ eval $(~/.claude/skills/gstack/bin/gstack-diff-scope <base> 2>/dev/null)
 4. **Apply the design checklist** against the changed files. For each item:
    - **[HIGH] mechanical CSS fix** (\`outline: none\`, \`!important\`, \`font-size < 16px\`): classify as AUTO-FIX
    - **[HIGH/MEDIUM] design judgment needed**: classify as ASK
-   - **[LOW] intent-based detection**: present as "Possible — verify visually or run /qa-design-review"
+   - **[LOW] intent-based detection**: present as "Possible — verify visually or run /design-review"
 
 5. **Include findings** in the review output under a "Design Review" header, following the output format in the checklist. Design findings merge with code review findings into the same Fix-First flow.
 
@@ -1152,7 +1152,7 @@ function findTemplates(): string[] {
     path.join(ROOT, 'retro', 'SKILL.md.tmpl'),
     path.join(ROOT, 'gstack-upgrade', 'SKILL.md.tmpl'),
     path.join(ROOT, 'plan-design-review', 'SKILL.md.tmpl'),
-    path.join(ROOT, 'qa-design-review', 'SKILL.md.tmpl'),
+    path.join(ROOT, 'design-review', 'SKILL.md.tmpl'),
     path.join(ROOT, 'design-consultation', 'SKILL.md.tmpl'),
     path.join(ROOT, 'document-release', 'SKILL.md.tmpl'),
   ];

scripts/skill-check.ts

@@ -28,7 +28,7 @@ const SKILL_FILES = [
   'plan-eng-review/SKILL.md',
   'setup-browser-cookies/SKILL.md',
   'plan-design-review/SKILL.md',
-  'qa-design-review/SKILL.md',
+  'design-review/SKILL.md',
   'gstack-upgrade/SKILL.md',
   'document-release/SKILL.md',
 ].filter(f => fs.existsSync(path.join(ROOT, f)));