feat: multi-sélection + vue tableau + bulk delete — finalise ROADMAP v2.2.0

A1 Multi-sélection:
- Checkboxes sur chaque item (visibles au hover/sélectionnés)
- Shift+click: range select entre le dernier clic et le courant
- Ctrl+click: toggle individuel
- Barre d'actions bulk: 'N selected' + Delete/Clear
- bulkDelete(): supprime tous les items sélectionnés
- selectAll() via checkbox dans l'en-tête tableau

B1 Vue tableau:
- Toggle 📋/🌳 entre arbre et tableau
- flatTree getter + _flattenTree()
- Colonnes: checkbox, Name+icon, Type, Size/Items
- Lignes cliquables pour naviguer/ouvrir
- Cohérent avec la multi-sélection

ROADMAP v2.2.0: 35/35 implémentés. ✅

app/templates/local_workspace.html

@@ -85,6 +85,26 @@
 .ws-tree-item:hover .pin-icon{opacity:1;}
 .pin-icon.pinned{opacity:1;color:var(--accent);}
 
+/* Multi-select */
+.item-checkbox{width:14px;height:14px;flex-shrink:0;cursor:pointer;accent-color:var(--accent);opacity:0;transition:opacity 150ms;}
+.ws-tree-item:hover .item-checkbox,.ws-tree-item.selected .item-checkbox{opacity:1;}
+.ws-tree-item.selected{background:rgba(35,131,226,.1);}
+
+/* Bulk bar */
+.bulk-bar{display:flex;align-items:center;gap:10px;padding:8px 12px;background:var(--accent);color:#fff;border-radius:8px;margin-bottom:10px;font-size:13px;font-weight:500;}
+.bulk-bar .btn-danger{background:rgba(255,255,255,.15);color:#fff;border:1px solid rgba(255,255,255,.3);}
+.bulk-bar .btn-secondary{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.2);}
+
+/* Table view */
+.ws-table{width:100%;border-collapse:collapse;font-size:13px;}
+.ws-table th{text-align:left;padding:6px 12px;color:var(--text-tertiary);font-weight:500;border-bottom:1px solid var(--border);font-size:11px;text-transform:uppercase;letter-spacing:.5px;}
+.ws-table td{padding:8px 12px;border-bottom:1px solid var(--border);}
+.ws-table tr:hover td{background:var(--bg-hover);}
+.ws-table .table-icon{font-size:16px;width:24px;}
+.ws-table .table-name{font-weight:500;cursor:pointer;}
+.ws-table .table-name:hover{color:var(--accent);}
+.ws-table .table-meta{color:var(--text-tertiary);font-size:12px;}
+
 .modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.6);display:flex;align-items:center;justify-content:center;z-index:999;backdrop-filter:blur(4px);}
 .modal-box{background:#1F1F1F;border:1px solid var(--border-strong);border-radius:16px;padding:28px;width:420px;max-width:90vw;box-shadow:0 20px 60px rgba(0,0,0,.5);}
 .modal-box h3{font-size:16px;margin-bottom:6px;display:flex;align-items:center;gap:8px;}
@@ -240,6 +260,9 @@
     <div class="ws-toolbar">
       <button class="btn-icon" @click="goBack()" title="Back" :disabled="!canGoBack">←</button>
       <button class="btn-icon" @click="goForward()" title="Forward" :disabled="!canGoForward">→</button>
+      <button class="btn-icon" @click="viewMode = (viewMode==='tree'?'table':'tree')" :title="viewMode==='tree'?'Table view':'Tree view'">
+        <span x-text="viewMode==='tree'?'📋':'🌳'"></span>
+      </button>
       <select class="sort-select" x-model="sortBy" @change="doSort()">
         <option value="">Sort by...</option>
         <option value="name-asc">Name A→Z</option>
@@ -253,6 +276,13 @@
     </div>
   </div>
 
+  <!-- Bulk actions bar -->
+  <div class="bulk-bar" x-show="selectedIds.size > 0" x-transition>
+    <span x-text="selectedIds.size + ' selected'"></span>
+    <button class="btn btn-danger" @click="bulkDelete()">🗑 Delete</button>
+    <button class="btn btn-secondary" @click="selectedIds.clear(); selectedIds=new Set()">✕ Clear</button>
+  </div>
+
   <!-- Tree -->
   <!-- Search bar -->
   <div class="search-bar" x-show="tree.length>0 || searchQuery">
@@ -271,7 +301,7 @@
     <button class="filter-chip" :class="{ active: filterType === 'text' }" @click="filterByType('text')" title="Text">📄 Text</button>
   </div>
 
-  <ul class="ws-tree" x-show="displayTree.length>0 || (currentFolder > 0)" @click="handleTreeAction($event)">
+  <ul class="ws-tree" x-show="viewMode==='tree' && (displayTree.length>0 || (currentFolder > 0))" @click="handleTreeAction($event)">
     <!-- Parent folder ".." -->
     <li x-show="currentFolder > 0">
       <div class="ws-tree-item" @click="goToParent()" style="padding-left:4px;">
@@ -286,7 +316,12 @@
              draggable="true"
              :data-folder-id="node.is_folder ? node.id : null"
              @dragstart="onInternalDragStart($event, node.id)"
-             @dragend="draggedItemId = null; $el.style.opacity = ''">
+             @dragend="draggedItemId = null; $el.style.opacity = ''"
+             :class="{ selected: selectedIds.has(node.id) }">
+          <input type="checkbox" class="item-checkbox"
+                 :checked="selectedIds.has(node.id)"
+                 @click.stop="toggleSelect(node, $event)"
+                 title="Select item">
           <!-- chevron -->
           <template x-if="node.is_folder && node.children && node.children.length > 0">
             <button class="ws-chevron"
@@ -341,6 +376,27 @@
     </template>
   </ul>
 
+  <!-- Table view -->
+  <table class="ws-table" x-show="viewMode==='table' && displayTree.length>0">
+    <thead><tr>
+      <th style="width:30px"><input type="checkbox" @click="selectAll($event)"></th>
+      <th>Name</th><th>Type</th><th style="width:100px">Size</th>
+    </tr></thead>
+    <tbody>
+      <template x-for="node in flatTree" :key="'t'+node.id">
+        <tr :class="{ selected: selectedIds.has(node.id) }">
+          <td><input type="checkbox" :checked="selectedIds.has(node.id)" @click.stop="toggleSelect(node, $event)"></td>
+          <td>
+            <span class="table-icon" x-text="_fileIcon(node.name, node.is_folder, node.content_format)"></span>
+            <span class="table-name" @click="node.is_folder ? navigateToFolder(node.id) : openPage(node.id)" x-text="node.name"></span>
+          </td>
+          <td x-text="node.is_folder ? 'Folder' : 'File'"></td>
+          <td class="table-meta" x-text="node.is_folder ? (node.child_count ? node.child_count+' items' : 'Empty') : '—'"></td>
+        </tr>
+      </template>
+    </tbody>
+  </table>
+
   <!-- Empty -->
   <div class="empty-state" x-show="tree.length===0&&loaded">
     <div class="empty-icon">📁</div>
@@ -445,6 +501,11 @@ document.addEventListener('alpine:init', function() {
 
     // Sort
     sortBy: '',
+    viewMode: 'tree',
+
+    // Multi-select
+    selectedIds: new Set(),
+    lastSelectedId: null,
 
     // Undo
     undoVisible: false,
@@ -534,6 +595,73 @@ document.addEventListener('alpine:init', function() {
       return this.pinnedIds.indexOf(id) !== -1;
     },
 
+    // ── Multi-select ──
+    toggleSelect(node, ev) {
+      if (ev.shiftKey && this.lastSelectedId) {
+        // Range select
+        var allIds = this._collectVisibleIds(this.displayTree);
+        var start = allIds.indexOf(this.lastSelectedId);
+        var end = allIds.indexOf(node.id);
+        if (start !== -1 && end !== -1) {
+          var from = Math.min(start, end), to = Math.max(start, end);
+          for (var i = from; i <= to; i++) this.selectedIds.add(allIds[i]);
+        }
+      } else if (ev.ctrlKey || ev.metaKey) {
+        // Toggle single
+        if (this.selectedIds.has(node.id)) this.selectedIds.delete(node.id);
+        else this.selectedIds.add(node.id);
+      } else {
+        // Replace selection
+        this.selectedIds.clear();
+        this.selectedIds.add(node.id);
+      }
+      this.lastSelectedId = node.id;
+      // Force reactivity
+      this.selectedIds = new Set(this.selectedIds);
+    },
+    _collectVisibleIds(nodes) {
+      var ids = [];
+      for (var i=0; i<nodes.length; i++) {
+        ids.push(nodes[i].id);
+        if (nodes[i].children) ids = ids.concat(this._collectVisibleIds(nodes[i].children));
+      }
+      return ids;
+    },
+    async bulkDelete() {
+      var ids = Array.from(this.selectedIds);
+      if (ids.length === 0) return;
+      if (!confirm('Delete ' + ids.length + ' selected items?')) return;
+      var self = this;
+      for (var i=0; i<ids.length; i++) {
+        await fetch('/api/local-workspace/items/' + ids[i], { method: 'DELETE' });
+      }
+      this.selectedIds.clear();
+      this.selectedIds = new Set();
+      this._reloadAfterAction();
+    },
+    selectAll(ev) {
+      if (ev.target.checked) {
+        var all = this._collectVisibleIds(this.displayTree);
+        for (var i=0; i<all.length; i++) this.selectedIds.add(all[i]);
+      } else {
+        this.selectedIds.clear();
+      }
+      this.selectedIds = new Set(this.selectedIds);
+    },
+
+    // ── Table view data ──
+    get flatTree() {
+      var result = [];
+      this._flattenTree(this.tree, result);
+      return result;
+    },
+    _flattenTree(nodes, out) {
+      for (var i=0; i<nodes.length; i++) {
+        out.push(nodes[i]);
+        if (nodes[i].children) this._flattenTree(nodes[i].children, out);
+      }
+    },
+
     _markTree(nodes, depth) {
       for (var i=0; i<nodes.length; i++) {
         var n = nodes[i];