feat: full character creation, personality traits, and session quality-of-life

Character creation:
- Full RQ3 Previous Experience wizard (4-step: identity, characteristics,
  culture/occupation/skills, review+save) with all 29 occupations across
  4 cultures; skills computed as base + category modifier + years × multiplier
- Character sheet expanded to show culture, occupation, derived stats (HP/FP/MP/
  DB/SR), all 7 skill category modifier badges, computed skill percentages grouped
  by category, weapon attack/parry %, hit locations with armour AP
- Location/destination tracker on character sheet (auto-saves on blur)
- parry_percent stored on combatant_weapons

Personality traits:
- 24 predefined traits (Brave, Greedy, Cautious, etc.) each rated 0-100%
- Trait → action bias map drives scene choice weighting
- rollPersonalityAction() rolls d100 per trait, sums biases, returns suggestion
- Trait editor (pill UI) on both character sheet and NPC view
- Adventure tab: Roll Personality button fires traits, highlights suggested choice

Tables and data:
- Import RQ3 character creation tables (Culture d8, Occupation d100 ×4, Craft
  sub-tables, Language Proficiency, Dropped Oil Lamp, Aging, Armor Points)
- Cross-table links: Culture → Occupation, Barbarian/Civilized Crafter → Craft
- Fix rollOnTable to use actual dice notation instead of flat random row index
- Remove unused resolveHeadInjury function

Session tools:
- Clear All button wipes all session data (characters, NPCs, enemies, combat,
  adventure, log) while keeping tables and spell mappings
- PATCH /api/characters/:id/traits and /api/npcs/:id/traits endpoints
- GET /api/rules/personality-traits reference endpoint
- POST /api/adventure/personality-roll endpoint

public/index.html

@@ -14,6 +14,7 @@
     <input type="file" id="import-file" accept="application/json" hidden>
     <button id="export-all-btn" class="button">Export All</button>
     <button id="export-log-btn" class="button">Export Log</button>
+    <button id="clear-all-btn" class="button" style="color:red">Clear All</button>
   </div>
 </header>