fix: Correct critical bugs and complete Creature/Group DataModel implementation

- Fix TypeError: controls.find is not a function in hooks.mjs
- Fix undefined 'npc' variable in applications.mjs
- Fix CONFIG.VERMINE.model undefined by checking game.system.template existence
- Fix TypeError: html.find(...).forEach is not a function in roll.mjs
- Fix Cannot set properties of undefined (setting 'initial') in actor.mjs
- Fix Cannot read properties of undefined (reading 'difficulty') in actor.mjs
- Fix ActiveEffect application phase 'initial' already completed by adding combatStatus to base template
- Fix Missing helper: 'select' in roll-dialog.hbs (removed invalid Handlebars select block)
- Add SIZE_LEVELS labels to creatureSizeLevels config
- Add SIZE_LEVELS translations to fr.json
- Add combatStatus to base actor template
- Convert all .html templates to .hbs for Foundry v14 compatibility
- Update item-sheet.mjs to use .hbs extension
- Update handlebars-manager.mjs to use .hbs for all partials

Complete Vermine2047 Creature and Group sheet implementation:
- Creature: Pattern, Size, Role, Pack with computed values
- Group: Totem, Reserve, Morale, Objectives, Members management
- All templates functional with proper styling

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

.github/copilot-instructions.md

@@ -0,0 +1,55 @@
+# Vermine 2047 — Copilot Instructions
+
+## Build & Development
+
+```bash
+npm run watch          # Watch SCSS + templates, proxy Foundry at localhost:30000 (requires Foundry running)
+npm run buildStyle     # Compile SCSS once to css/vermine2047.css
+npm run pullYAMLtoLDB  # Build LevelDB compendium packs from src/packs/ YAML → packs/
+npm run pushLDBtoYAML  # Extract LevelDB packs to editable YAML in src/packs/
+npx eslint module/     # Lint JavaScript (ESLint configured in .eslintrc.js)
+```
+
+There are no automated tests. Use `npm run watch` during development to live-reload SCSS and Handlebars templates via browser-sync.
+
+## Architecture
+
+This is a **FoundryVTT game system** (`system.json` → system ID `vermine2047`), compatible with Foundry v11–v14. It implements the French post-apocalyptic TTRPG **Vermine 2047**.
+
+**Entry point**: `module/vermine2047.mjs` — loaded as an ES module. On the `init` hook it registers custom document classes, sheet classes, combat classes, Handlebars helpers, settings, hooks, and preloads templates.
+
+**Actor types** (4): `character`, `npc`, `group`, `creature`
+**Item types** (12): `item`, `weapon`, `defense`, `vehicle`, `ability`, `specialty`, `background`, `trauma`, `evolution`, `rumor`, `target`, `rite`
+
+**Key source files** (`module/system/`):
+
+| File | Role |
+|---|---|
+| `config.mjs` | All game constants (`CONFIG.VERMINE`) — abilities, skills, totems, threat/role/pattern levels, traits, damage types |
+| `roll.mjs` | `VermineUtils` class — d10 dice pool system with success counting, totem mechanics, rerolls, Dice So Nice integration |
+| `fight.mjs` | Confrontation system (`VermineFight`), plus `VermineCombat`, `VermineCombatant`, `VermineCombatTracker` |
+| `group-link.mjs` | `GroupLink` — bidirectional sync of members/encounters between group actors and character/NPC actors via Foundry hooks |
+| `hooks.mjs` | All Foundry hook registrations (chat messages, hotbar drop, combat, preCreate, Dice So Nice) |
+| `settings.mjs` | System settings (game mode: survie/cauchemar/apocalypse) |
+| `handlebars-manager.mjs` | Template preloading paths + all Handlebars helpers (level config lookups, math, conditionals) |
+| `effects.mjs` | Active effect management |
+| `dialogs/rollDialog.mjs` | Advanced roll dialog (ability/skill selection, difficulty, totems, specialties, assist/pool bonuses) |
+| `applications.mjs` | `TotemPicker` and `TraitSelector` applications |
+
+**Data model**: `template.json` defines the Actor/Item schemas (Foundry's template system). Derived data is computed in `prepareDerivedData()` in `module/documents/actor.mjs` and `module/documents/item.mjs`.
+
+**Sheet inheritance**: `VermineActorSheet` (base) → `VermineCharacterSheet`, `VermineNpcSheet`, `VermineGroupSheet`, `VermineCreatureSheet`. Sheets expose `CONFIG.VERMINE` as `context.config` in template data.
+
+**Compendium packs**: Stored in `packs/` as LevelDB databases. Edit source data in `src/packs/` as YAML, then `npm run pullYAMLtoLDB` to build. The CI release workflow runs this automatically.
+
+## Key Conventions
+
+- **All `.mjs` files**: ES module syntax only. Foundry globals (`game`, `Hooks`, `CONFIG`, `Actor`, `Item`, `ChatMessage`, `Roll`, `Handlebars`, `renderTemplate`, `foundry`) are available but declared as readonly globals in `.eslintrc.js`.
+- **Code language**: Source code and comments are in French. UI strings in `lang/fr.json` and `lang/en.json`. Use `game.i18n.localize()` for all user-visible text.
+- **Template naming**: Actor sheets at `templates/actor/actor-{type}-sheet.hbs`, item sheets at `templates/item/item-{type}-sheet.html` (note: item sheets use `.html`, everything else uses `.hbs`). Chat card templates at `templates/item/chatCards/{type}.hbs`.
+- **Dice system**: d10 pools with success counting (result ≥ difficulty). Totem dice (human/adapted) count double on success. Formula syntax: `{N}d10cs>={threshold}[label]`. Totem dice: `(1d10cs>={threshold}[totem_label]*2)`.
+- **CSS**: SCSS sources in `scss/` compile to `css/vermine2047.css`. Organized by concern: `_app.scss`, `item-sheet.scss`, `roll.scss`, `dialog.scss`, etc.
+- **Data tools**: The `pushLDBtoYAML` / `pullYAMLtoLDB` scripts use `@foundryvtt/foundryvtt-cli` to convert between LevelDB packs and editable YAML. When adding pack content, edit YAML in `src/packs/` then rebuild.
+- **Actor updates**: Use `actor.update({...})` with dot-notation paths (e.g., `'system.adaptation.totems.human.value'`). The `GroupLink` hooks system automatically syncs group memberships on actor changes.
+- **New template partials**: Must be listed in `preloadHandlebarsTemplates()` in `handlebars-manager.mjs` for pre-compilation.
+- **Full architecture documentation**: See `docs/technical/ARCHITECTURE.md`.