fix: vues workspace affichent répertoire courant + navigation sans rechargement

- Vues list/details/title/content utilisent displayTree (enfants du dossier courant)
  au lieu de flatTree (arbre entier aplati) → comportement explorateur de fichiers
- Navigation sans rechargement: navigateToFolder/goToParent/goBack/goForward
  utilisent fetch AJAX + _loadFolder() au lieu de window.location
- folderStack remplace navHistory + breadcrumb: pile de navigation avec noms
- Breadcrumb dynamique: cliquable, affiche le chemin courant depuis folderStack
- _reloadAfterAction utilise _loadFolder au lieu de window.location.reload
- La vue choisie (tree/list/details/title/content) est préservée pendant la navigation

app/templates/local_workspace.html

@@ -311,20 +311,20 @@
   </div>
 
   <!-- Breadcrumb -->
-  <div class="breadcrumb-bar" x-show="breadcrumb.length > 0">
-    <a href="/local-workspace">📁 {{ workspace_name }}</a>
-    <template x-for="(b, i) in breadcrumb" :key="b.id">
+  <div class="breadcrumb-bar" x-show="folderStack.length > 0">
+    <a href="/local-workspace" @click.prevent="navigateToRoot()">📁 {{ workspace_name }}</a>
+    <template x-for="(b, i) in folderStack" :key="'bc'+b.id">
       <span style="display:contents;">
         <span class="sep">/</span>
-        <a :href="'/local-workspace?folder=' + b.id" x-text="b.name" 
-           :class="{ current: i === breadcrumb.length - 1 }"
+        <a href="#" @click.prevent="navigateToBreadcrumb(i)" x-text="b.name" 
+           :class="{ current: i === folderStack.length - 1 }"
            @dblclick.prevent="startInlineRename(b, $event)"></a>
       </span>
     </template>
   </div>
 
   <!-- Path bar -->
-  <div class="path-bar" x-show="breadcrumb.length > 0">
+  <div class="path-bar" x-show="folderStack.length > 0">
     <span class="path-icon">📂</span>
     <input class="path-input" :value="pathValue" 
            @keydown.enter="navigateToPath()"
@@ -334,9 +334,9 @@
   </div>
 
   <div class="ws-header">
-    <h1 x-show="breadcrumb.length===0">📁 {{ workspace_name }}</h1>
-    <h1 x-show="breadcrumb.length>0">
-      📁 <span x-text="breadcrumb.length > 0 ? breadcrumb[breadcrumb.length-1].name : ''"></span>
+    <h1 x-show="folderStack.length===0 || (folderStack.length===1 && folderStack[0].id===0)">📁 {{ workspace_name }}</h1>
+    <h1 x-show="folderStack.length>0 && !(folderStack.length===1 && folderStack[0].id===0)">
+      📁 <span x-text="folderStack[folderStack.length-1].name"></span>
     </h1>
     <div class="ws-toolbar">
       <button class="btn-icon" @click="goBack()" title="Back" :disabled="!canGoBack">←</button>
@@ -392,7 +392,7 @@
 
   <ul class="ws-tree" x-show="viewMode==='tree' && (displayTree.length>0 || (currentFolder > 0))" @click="handleTreeAction($event)">
     <!-- Parent folder ".." -->
-    <li x-show="currentFolder > 0">
+    <li x-show="currentFolder > 0" style="list-style:none;">
       <div class="ws-tree-item" @click="goToParent()" style="padding-left:4px;">
         <span style="width:16px;flex-shrink:0;"></span>
         <span class="icon">📂</span>
@@ -534,7 +534,7 @@
   </table>
 
   <!-- List view — compact flat list -->
-  <table class="ws-table-compact" x-show="viewMode==='list' && !searchQuery && !filterType && !tagFilter && flatTree.length>0">
+  <table class="ws-table-compact" x-show="viewMode==='list' && !searchQuery && !filterType && !tagFilter && displayTree.length>0">
     <thead><tr>
       <th style="width:24px"></th>
       <th>Name</th>
@@ -543,7 +543,7 @@
       <th style="width:100px">Modified</th>
     </tr></thead>
     <tbody>
-      <template x-for="node in flatTree" :key="'l'+node.id">
+      <template x-for="node in displayTree" :key="'l'+node.id">
         <tr @click="node.is_folder ? navigateToFolder(node.id) : selectForPreview(node)" style="cursor:pointer">
           <td><span x-text="_fileIcon(node.name, node.is_folder, node.content_format)"></span></td>
           <td class="col-name" x-text="node.name"></td>
@@ -556,7 +556,7 @@
   </table>
 
   <!-- Details view — full table with all columns -->
-  <table class="ws-table-enhanced" x-show="viewMode==='details' && !searchQuery && !filterType && !tagFilter && flatTree.length>0">
+  <table class="ws-table-enhanced" x-show="viewMode==='details' && !searchQuery && !filterType && !tagFilter && displayTree.length>0">
     <thead><tr>
       <th style="width:24px"></th>
       <th>Name</th>
@@ -568,7 +568,7 @@
       <th>Tags</th>
     </tr></thead>
     <tbody>
-      <template x-for="node in flatTree" :key="'d'+node.id">
+      <template x-for="node in displayTree" :key="'d'+node.id">
         <tr @click="node.is_folder ? navigateToFolder(node.id) : selectForPreview(node)" style="cursor:pointer"
             :class="{ 'selected-row': previewItem && previewItem.id === node.id }">
           <td><span class="table-icon" x-text="_fileIcon(node.name, node.is_folder, node.content_format)"></span></td>
@@ -591,8 +591,8 @@
   </table>
 
   <!-- Title view — card grid -->
-  <div class="title-grid" x-show="viewMode==='title' && !searchQuery && !filterType && !tagFilter && flatTree.length>0">
-    <template x-for="node in flatTree" :key="'g'+node.id">
+  <div class="title-grid" x-show="viewMode==='title' && !searchQuery && !filterType && !tagFilter && displayTree.length>0">
+    <template x-for="node in displayTree" :key="'g'+node.id">
       <div class="title-card" @click="node.is_folder ? navigateToFolder(node.id) : selectForPreview(node)"
            :class="{ 'selected-card': previewItem && previewItem.id === node.id }">
         <div class="title-card-icon" x-text="node.is_folder ? '📁' : _fileIcon(node.name, node.is_folder, node.content_format)"></div>
@@ -606,8 +606,8 @@
   </div>
 
   <!-- Content view — list with inline preview -->
-  <div class="content-list" x-show="viewMode==='content' && !searchQuery && !filterType && !tagFilter && flatTree.length>0">
-    <template x-for="node in flatTree" :key="'c'+node.id">
+  <div class="content-list" x-show="viewMode==='content' && !searchQuery && !filterType && !tagFilter && displayTree.length>0">
+    <template x-for="node in displayTree" :key="'c'+node.id">
       <div class="content-item" @click="node.is_folder ? navigateToFolder(node.id) : selectForPreview(node)"
            :class="{ 'selected-row': previewItem && previewItem.id === node.id }">
         <div class="content-item-header">
@@ -654,7 +654,7 @@
     <div class="modal-box">
       <h3><span x-text="createType==='folder'?'📁':'📄'"></span> <span x-text="createType==='folder'?'New Folder':'New File'"></span></h3>
       <p class="modal-sub">
-        In <strong>{{ workspace_name }}</strong>
+        In <strong>{{ workspace_name }}</strong> <span x-show="folderStack.length>1">/ <span x-text="folderStack[folderStack.length-1].name"></span></span>
         <span x-show="parentFolder"> / <span x-text="parentFolder?.name"></span></span>
       </p>
       <input class="modal-input" x-model="newName" :placeholder="createType==='folder'?'Folder name':'File name'" @keydown.enter="doCreate" x-ref="cinp">
@@ -748,6 +748,7 @@ document.addEventListener('alpine:init', function() {
     currentFolder: {{ current_folder_id }},
     searchQuery: '',
     filterType: '',
+    folderStack: [],
 
     // Inline rename
     renamingId: null,
@@ -790,7 +791,22 @@ document.addEventListener('alpine:init', function() {
 
     // Path bar
     get pathValue() { 
-      return '/workspace/' + this.breadcrumb.map(function(b){return b.name}).join('/');
+      return '/workspace/' + this.folderStack.filter(function(b){return b.id > 0}).map(function(b){return b.name}).join('/');
+    },
+
+    async navigateToRoot() {
+      this.folderStack = [{id: 0, name: 'Root'}];
+      this.navIndex = 0;
+      this._saveExpandedState();
+      await this._loadFolder(0);
+    },
+
+    async navigateToBreadcrumb(idx) {
+      this.folderStack = this.folderStack.slice(0, idx + 1);
+      this.navIndex = idx;
+      this._saveExpandedState();
+      var entry = this.folderStack[idx];
+      await this._loadFolder(entry ? entry.id : 0);
     },
 
     // Drag indicators
@@ -808,7 +824,7 @@ document.addEventListener('alpine:init', function() {
     navHistory: [],
     navIndex: -1,
     get canGoBack() { return this.navIndex > 0; },
-    get canGoForward() { return this.navIndex < this.navHistory.length - 1; },
+    get canGoForward() { return this.navIndex < this.folderStack.length - 1; },
 
     // Preview popup
     previewVisible: false,
@@ -841,9 +857,17 @@ document.addEventListener('alpine:init', function() {
         this.displayTree = roots;
         this.breadcrumb = d.breadcrumb || [];
         this.loaded = true;
-        // Initialize nav history
-        this.navHistory = [this.currentFolder || 0];
-        this.navIndex = 0;
+        // Initialize folder stack from breadcrumb
+        this.folderStack = (this.breadcrumb || []).map(function(b) { return {id: b.id, name: b.name}; });
+        if (this.currentFolder && this.currentFolder > 0 && this.folderStack.length === 0) {
+          this.folderStack = [{id: 0, name: 'Root'}];
+          // Add current folder name from tree if present
+          if (this.tree.length > 0) {
+            // The current folder's children are in breadcrumb, parent is the last
+          }
+        }
+        this.navIndex = this.folderStack.length > 0 ? this.folderStack.length - 1 : 0;
+        if (this.folderStack.length === 0) this.folderStack = [{id: 0, name: 'Root'}];
         // Expose globally for renderChildren onclick handlers
         window._wsData = this;
         // Listen for online/offline
@@ -1159,37 +1183,69 @@ document.addEventListener('alpine:init', function() {
       }
     },
 
-    navigateToFolder(id) {
-      // Push to nav history
-      if (this.navIndex < this.navHistory.length - 1) {
-        this.navHistory = this.navHistory.slice(0, this.navIndex + 1);
+    async navigateToFolder(id) {
+      // Find the folder name for the stack
+      var folderNode = this._findNodeById(this.tree, id);
+      var folderName = folderNode ? folderNode.name : 'Folder';
+      // Push to folder stack for breadcrumb
+      if (this.navIndex < this.folderStack.length - 1) {
+        this.folderStack = this.folderStack.slice(0, this.navIndex + 1);
       }
-      this.navHistory.push(id);
-      this.navIndex = this.navHistory.length - 1;
-      this._saveExpandedState();
-      window.location = '/local-workspace?folder=' + id;
+      this.folderStack.push({id: id, name: folderName});
+      this.navIndex = this.folderStack.length - 1;
+      // Fetch children of this folder
+      await this._loadFolder(id);
     },
 
-    goBack() {
+    async goToParent() {
+      if (this.folderStack.length <= 1) { await this._loadFolder(0); return; }
+      this.folderStack.pop();
+      this.navIndex = this.folderStack.length - 1;
+      var parentId = this.folderStack.length > 0 ? this.folderStack[this.folderStack.length - 1].id : 0;
+      await this._loadFolder(parentId);
+    },
+
+    async _loadFolder(folderId) {
+      var url = '/api/local-workspace/tree';
+      if (folderId && folderId > 0) url += '?folder=' + folderId;
+      try {
+        var r = await fetch(url);
+        var d = await r.json();
+        var roots = d.tree || [];
+        this._markTree(roots, 0);
+        this.tree = roots;
+        this.displayTree = [...roots];
+        this.breadcrumb = d.breadcrumb || [];
+        this.currentFolder = folderId || 0;
+        this._saveExpandedState();
+        this.previewItem = null;
+      } catch(e) { console.error('Load folder error:', e); }
+    },
+
+    _findNodeById(nodes, id) {
+      for (var i=0; i<nodes.length; i++) {
+        if (nodes[i].id === id) return nodes[i];
+        if (nodes[i].children) {
+          var found = this._findNodeById(nodes[i].children, id);
+          if (found) return found;
+        }
+      }
+      return null;
+    },
+
+    async goBack() {
       if (this.navIndex <= 0) return;
       this.navIndex--;
-      var id = this.navHistory[this.navIndex];
+      var entry = this.folderStack[this.navIndex];
       this._saveExpandedState();
-      window.location = id ? '/local-workspace?folder=' + id : '/local-workspace';
+      await this._loadFolder(entry ? entry.id : 0);
     },
-    goForward() {
-      if (this.navIndex >= this.navHistory.length - 1) return;
+    async goForward() {
+      if (this.navIndex >= this.folderStack.length - 1) return;
       this.navIndex++;
-      var id = this.navHistory[this.navIndex];
+      var entry = this.folderStack[this.navIndex];
       this._saveExpandedState();
-      window.location = id ? '/local-workspace?folder=' + id : '/local-workspace';
-    },
-    goToParent() {
-      var bc = this.breadcrumb;
-      if (bc.length <= 1) { window.location = '/local-workspace'; return; }
-      var parentId = bc[bc.length - 2].id;
-      this._saveExpandedState();
-      window.location = '/local-workspace?folder=' + parentId;
+      await this._loadFolder(entry ? entry.id : 0);
     },
 
     _saveExpandedState() {
@@ -1198,7 +1254,7 @@ document.addEventListener('alpine:init', function() {
     },
     _reloadAfterAction() {
       this._saveExpandedState();
-      window.location.reload();
+      this._loadFolder(this.currentFolder);
     },
 
     // ── Inline Rename ──