fix(skills): add Anti-Patterns and fix descriptions for remaining skills (batch 3)

Processed 27 skills: teaching-lesson-plan through feature-prioritisation and all figma skills.
Added Anti-Patterns sections to all 27 skills.
Added Quality Checks section to financial-due-diligence (was missing entirely).
Converted user-research-synthesis Quality Standards to binary checkbox format.
Rewrote descriptions for figma-design-critique-pm, figma-design-qa, figma-design-review,
team-health-check, and user-interview-synthesis.

https://claude.ai/code/session_01MuGKn3a3Gbqoe8uM5Lmuqt

skills/figma-user-flow-planner/SKILL.md

@@ -68,6 +68,14 @@ Feature name/
 - [ ] Out-of-scope section is explicit
 - [ ] Figma file structure matches screen map
 
+## Anti-Patterns
+
+- [ ] Do not plan only the happy path — all error states, empty states, and edge cases must be mapped before designing starts
+- [ ] Do not produce a flow map that doesn't match the Figma file structure — the page structure must reflect the flow map
+- [ ] Do not define screens without specifying all required states — a screen without its variants is an incomplete design scope
+- [ ] Do not start designing before entry and exit points are fully documented — unclear boundaries cause scope creep
+- [ ] Do not plan user flows without tying each step back to a user goal — every screen must justify its existence
+
 ## Example Trigger Phrases
 - "Plan the user flow for [feature] in Figma"
 - "What screens do I need to design for [feature]?"