fix: ajout '..' parent folder dans vues List, Details, Cards, Content

- List (compact): rangée '..' avec icône folder avant les données
- Details (enhanced): rangée '..' avec toutes les colonnes
- Cards (title grid): carte '..' dans la grille
- Content (content list): élément '..' avec preview 'Parent folder'
- x-show='currentFolder > 0' pour n'afficher que dans un sous-dossier
- 143 tests passent

app/templates/local_workspace.html

@@ -2388,6 +2388,14 @@ console.log('FLOWDECK v2.4.6 — IIFE done, _wsInitData keys:', Object.keys(wind
       <th style="width:100px">Modified</th>
     </tr></thead>
     <tbody>
+      <!-- Parent folder ".." -->
+      <tr x-show="currentFolder > 0" @click="goToParent()" style="cursor:pointer" class="parent-folder-row">
+        <td>{{ fd_icon("folder",16) }}</td>
+        <td class="col-name"><span style="font-weight:600;color:var(--text);">..</span></td>
+        <td style="font-size:12px;color:var(--text-tertiary)">Folder</td>
+        <td style="font-size:12px;color:var(--text-secondary)"></td>
+        <td style="font-size:12px;color:var(--text-tertiary)"></td>
+      </tr>
       <template x-for="node in displayTree" :key="'l'+node.id">
         <tr :data-ws-id="node.id" @click="node.is_folder ? navigateToFolder(node.id) : selectForPreview(node)" @mouseenter="showPreview($event, node)" @mouseleave="hidePreview()" style="cursor:pointer">
           <td><span x-html="_fileIcon(node.name, node.is_folder, node.content_format)"></span></td>
@@ -2413,6 +2421,17 @@ console.log('FLOWDECK v2.4.6 — IIFE done, _wsInitData keys:', Object.keys(wind
       <th>Tags</th>
     </tr></thead>
     <tbody>
+      <!-- Parent folder ".." -->
+      <tr x-show="currentFolder > 0" @click="goToParent()" style="cursor:pointer" class="parent-folder-row">
+        <td>{{ fd_icon("folder",16) }}</td>
+        <td class="col-name"><span style="font-weight:600;color:var(--text);">..</span></td>
+        <td class="col-path"></td>
+        <td class="col-size"></td>
+        <td class="col-date"></td>
+        <td class="col-type">Folder</td>
+        <td class="col-author"></td>
+        <td class="col-tags"></td>
+      </tr>
       <template x-for="node in displayTree" :key="'d'+node.id">
         <tr :data-ws-id="node.id" @click="node.is_folder ? navigateToFolder(node.id) : selectForPreview(node)" @mouseenter="showPreview($event, node)" @mouseleave="hidePreview()" style="cursor:pointer"
             :class="{ 'selected-row': previewItem && previewItem.id === node.id }">
@@ -2437,6 +2456,12 @@ console.log('FLOWDECK v2.4.6 — IIFE done, _wsInitData keys:', Object.keys(wind
 
   <!-- Title view — card grid -->
   <div class="title-grid" x-show="viewMode==='title' && !searchQuery && !filterType && !tagFilter && displayTree.length>0">
+    <!-- Parent folder ".." -->
+    <div class="title-card parent-folder-card" x-show="currentFolder > 0" @click="goToParent()" style="cursor:pointer">
+      <div class="title-card-icon">{{ fd_icon("folder",24) }}</div>
+      <div class="title-card-name" style="font-weight:600;">..</div>
+      <div class="title-card-meta"><span>Parent folder</span></div>
+    </div>
     <template x-for="node in displayTree" :key="'g'+node.id">
       <div class="title-card" :data-ws-id="node.id" @click="node.is_folder ? navigateToFolder(node.id) : selectForPreview(node)" @mouseenter="showPreview($event, node)" @mouseleave="hidePreview()"
            :class="{ 'selected-card': previewItem && previewItem.id === node.id }">
@@ -2452,6 +2477,14 @@ console.log('FLOWDECK v2.4.6 — IIFE done, _wsInitData keys:', Object.keys(wind
 
   <!-- Content view — list with inline preview -->
   <div class="content-list" x-show="viewMode==='content' && !searchQuery && !filterType && !tagFilter && displayTree.length>0">
+    <!-- Parent folder ".." -->
+    <div class="content-item parent-folder-item" x-show="currentFolder > 0" @click="goToParent()" style="cursor:pointer">
+      <div class="content-item-header">
+        {{ fd_icon("folder",16) }}
+        <span class="col-name" style="font-weight:600;">..</span>
+      </div>
+      <div class="content-item-preview">Parent folder</div>
+    </div>
     <template x-for="node in displayTree" :key="'c'+node.id">
       <div class="content-item" :data-ws-id="node.id" @click="node.is_folder ? navigateToFolder(node.id) : selectForPreview(node)" @mouseenter="showPreview($event, node)" @mouseleave="hidePreview()"
            :class="{ 'selected-row': previewItem && previewItem.id === node.id }">