Refonte design : 4 humeurs, onboarding, sections avec boite a outils

- Systeme de themes adaptatifs : Peps (light chaud), Zen (light calme),
  Chagrine (dark violet), Grave (dark ambre) avec CSS custom properties
- Dashboard d'accueil orienté onboarding avec cartes-portes et teaser
  boite a outils
- SectionLayout reutilisable : liste + sidebar toolbox + status pills
  cliquables (En prepa / En vote / En vigueur / Clos)
- ToolboxVignette : vignettes Contexte / Tutos / Choisir / Demarrer
- Seed : Acte engagement certification + forgeron, Runtime Upgrade
  (decision on-chain), 3 modalites de vote (majoritaire, quadratique,
  permanent)
- Backend adapte SQLite (Uuid portable, 204 fix, pool conditionnel)
- Correction noms composants (pathPrefix: false), pinia/nuxt ^0.11

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

frontend/app/composables/useMood.ts

@@ -0,0 +1,65 @@
+import type { Ref } from 'vue'
+
+export interface Mood {
+  id: string
+  label: string
+  description: string
+  icon: string
+  isDark: boolean
+}
+
+const STORAGE_KEY = 'glibredecision_mood'
+
+const moods: Mood[] = [
+  { id: 'peps', label: 'Peps', description: 'Energique et chaleureux', icon: 'i-lucide-sun', isDark: false },
+  { id: 'zen', label: 'Zen', description: 'Calme et serein', icon: 'i-lucide-leaf', isDark: false },
+  { id: 'chagrine', label: 'Chagrine', description: 'Profond et subtil', icon: 'i-lucide-moon', isDark: true },
+  { id: 'grave', label: 'Grave', description: 'Serieux et solennel', icon: 'i-lucide-shield', isDark: true },
+]
+
+const currentMood: Ref<string> = ref('peps')
+
+function applyMood(moodId: string) {
+  if (import.meta.server) return
+
+  const mood = moods.find(m => m.id === moodId)
+  if (!mood) return
+
+  const html = document.documentElement
+
+  // Remove all existing mood classes
+  moods.forEach(m => html.classList.remove(`mood-${m.id}`))
+
+  // Add the new mood class
+  html.classList.add(`mood-${moodId}`)
+
+  // Sync color-mode (light/dark) via Nuxt's useColorMode
+  const colorMode = useColorMode()
+  colorMode.preference = mood.isDark ? 'dark' : 'light'
+
+  // Persist choice
+  localStorage.setItem(STORAGE_KEY, moodId)
+
+  currentMood.value = moodId
+}
+
+function setMood(moodId: string) {
+  applyMood(moodId)
+}
+
+function initMood() {
+  if (import.meta.server) return
+
+  const saved = localStorage.getItem(STORAGE_KEY)
+  const moodId = saved && moods.some(m => m.id === saved) ? saved : 'peps'
+  applyMood(moodId)
+}
+
+export function useMood() {
+  return {
+    currentMood: readonly(currentMood),
+    moods,
+    setMood,
+    initMood,
+  }
+}