refactor(frontend) : reorganize components into subdirectories and fix imports

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

frontend/components/ui/ColorPicker.vue

@@ -0,0 +1,31 @@
+<template>
+    <div>
+        <p class="mb-2 text-sm font-medium text-neutral-700">Couleur</p>
+        <div class="flex flex-wrap gap-3">
+            <button
+                v-for="color in colors"
+                :key="color"
+                type="button"
+                class="h-10 w-10 rounded-full border-2 transition-transform hover:scale-110"
+                :class="modelValue === color ? 'border-neutral-900 scale-110' : 'border-transparent'"
+                :style="{ backgroundColor: color }"
+                @click="emit('update:modelValue', color)"
+            />
+        </div>
+    </div>
+</template>
+
+<script setup lang="ts">
+defineProps<{
+    modelValue: string
+}>()
+
+const emit = defineEmits<{
+    (e: 'update:modelValue', value: string): void
+}>()
+
+const colors = [
+    '#222783', '#26A69A', '#E91E63', '#4A90D9',
+    '#7E57C2', '#8BC34A', '#FDD835', '#80DEEA', '#FF7043',
+]
+</script>