feat : add project code and task auto-numbering

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

frontend/components/project/ProjectDrawer.vue

@@ -1,6 +1,15 @@
 <template>
     <AppDrawer v-model="isOpen" :title="isEditing ? 'Modifier un projet' : 'Ajouter un projet'">
         <form @submit.prevent="handleSubmit" class="flex flex-col gap-2">
+            <MalioInputText
+                v-model="form.code"
+                label="Code"
+                input-class="w-full uppercase"
+                :disabled="isEditing"
+                :error="touched.code && !form.code.trim() ? 'Le code est requis' : touched.code && !/^[A-Z]{2,10}$/.test(form.code.trim()) ? '2 à 10 lettres majuscules' : ''"
+                @blur="touched.code = true"
+                @input="form.code = form.code.toUpperCase().replace(/[^A-Z]/g, '')"
+            />
             <MalioInputText
                 v-model="form.name"
                 label="Titre"
@@ -62,6 +71,7 @@ const isEditing = computed(() => !!props.project)
 const isSubmitting = ref(false)
 
 const form = reactive({
+    code: '',
     name: '',
     description: '',
     color: '#222783',
@@ -69,6 +79,7 @@ const form = reactive({
 })
 
 const touched = reactive({
+    code: false,
     name: false,
 })
 
@@ -79,16 +90,19 @@ const clientOptions = computed(() =>
 watch(() => props.modelValue, (open) => {
     if (open) {
         if (props.project) {
+            form.code = props.project.code ?? ''
             form.name = props.project.name ?? ''
             form.description = props.project.description ?? ''
             form.color = props.project.color ?? '#222783'
             form.clientId = props.project.client?.id ?? null
         } else {
+            form.code = ''
             form.name = ''
             form.description = ''
             form.color = '#222783'
             form.clientId = null
         }
+        touched.code = false
         touched.name = false
     }
 })
@@ -97,7 +111,9 @@ const { create, update } = useProjectService()
 
 async function handleSubmit() {
     touched.name = true
+    touched.code = true
     if (!form.name.trim()) return
+    if (!isEditing.value && (!form.code.trim() || !/^[A-Z]{2,10}$/.test(form.code.trim()))) return
 
     isSubmitting.value = true
     try {
@@ -111,6 +127,7 @@ async function handleSubmit() {
         if (isEditing.value && props.project) {
             await update(props.project.id, payload)
         } else {
+            payload.code = form.code.trim()
             await create(payload)
         }