Initial Drupal site: content model + validation + Vue dashboard

- Content type "Ligne comptable" with Paragraphs "Répartition" (Compte + Montant)
- Taxonomies: Compte (9 comptes) and Client (unified client list)
- hook_node_presave + form validate: sum(répartition) must equal montant HT
- /dashboard route (progressive decoupling): Vue 3 app fetching JSON:API,
  computing solde par compte / par client client-side
- "Ajouter une ligne" opens the real Drupal node form in an AJAX modal
- Gin as default + admin theme
- 9 opening-balance lines seeded from suivi_compta_SASFigli2026_v2.ods

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

config/sync/field.storage.user.user_picture.yml

@@ -0,0 +1,34 @@
+uuid: bf99aa23-ca7f-4644-803a-ab91bc1d2039
+langcode: en
+status: true
+dependencies:
+  module:
+    - file
+    - image
+    - user
+_core:
+  default_config_hash: 0q8-mw8y-Ls5I578sIPQFLp4ljpH7WvVYpzY-I9O-8E
+id: user.user_picture
+field_name: user_picture
+entity_type: user
+type: image
+settings:
+  target_type: file
+  display_field: false
+  display_default: false
+  uri_scheme: public
+  default_image:
+    uuid: null
+    alt: ''
+    title: ''
+    width: null
+    height: null
+module: image
+locked: false
+cardinality: 1
+translatable: true
+indexes:
+  target_id:
+    - target_id
+persist_with_no_fields: false
+custom_storage: false