feat: prévisualisation depuis la corbeille + suppression doublon nav

- Route /trash/preview/<path> : réutilise preview_image/text/other.html
  avec from_trash=True (← Corbeille, pas de rename ni de resize)
- Nom de fichier cliquable dans la liste corbeille → aperçu
- Suppression du lien "Tableau de bord" du header (doublon avec le logo)
- Ferme #25

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

app/app.py

@@ -741,6 +741,41 @@ def trash_restore():
     return redirect(url_for("browse", subpath=parent) if parent != "." else url_for("browse"))
 
 
+@app.route("/trash/preview/<path:subpath>")
+def trash_preview(subpath):
+    redir = _require_admin()
+    if redir:
+        return redir
+    target = (TRASH_ROOT / subpath).resolve()
+    if not str(target).startswith(str(TRASH_ROOT)):
+        abort(400)
+    if not target.is_file():
+        abort(404)
+    stat = target.stat()
+    ext  = target.suffix.lower()
+    ctx  = dict(
+        subpath    = subpath,
+        filename   = target.name,
+        filesize   = _humansize(stat.st_size),
+        mtime      = datetime.fromtimestamp(stat.st_mtime),
+        raw_url    = url_for("trash_raw", subpath=subpath),
+        parent_path= None,
+        prev_path  = None,
+        next_path  = None,
+        sibling_pos= "",
+        ext        = ext,
+        from_trash = True,
+    )
+    if ext in IMAGE_EXT:
+        ctx["meta"] = _image_meta(target)
+        return render_template("preview_image.html", **ctx)
+    if ext in TEXT_EXT:
+        return render_template("preview_text.html",
+                               content=target.read_text(errors="replace"),
+                               lang=ext.lstrip("."), **ctx)
+    return render_template("preview_other.html", **ctx)
+
+
 @app.route("/trash/empty", methods=["POST"])
 def trash_empty():
     redir = _require_admin()

app/templates/_file_table.html

@@ -61,7 +61,7 @@
                  alt="{{ e.name }}" loading="lazy">
           {% endif %}
           {% if mode == 'trash' %}
-            <span class="trash-filename">{{ e.name }}</span>
+            <a href="{{ url_for('trash_preview', subpath=e.path) }}" class="trash-filename">{{ e.name }}</a>
           {% else %}
             <a href="{{ url_for('browse', subpath=e.path) }}">
               {{ e.name }}{% if e.is_dir %}/{% endif %}

app/templates/base.html

@@ -16,8 +16,6 @@
       <span>A<strong>l</strong>p<strong>inux</strong> <span class="brand-sub">Static</span></span>
     </a>
     <nav class="header-nav">
-      <a href="{{ url_for('dashboard') }}"
-         {% if request.endpoint == 'dashboard' %}class="active"{% endif %}>Tableau de bord</a>
       <a href="{{ url_for('browse') }}"
          {% if request.endpoint == 'browse' %}class="active"{% endif %}>Parcourir</a>
       <a href="{{ url_for('stats') }}"

app/templates/preview_image.html

@@ -5,18 +5,26 @@
 
 <section class="card">
   <div class="preview-header">
+    {% if from_trash %}
+      <a href="{{ url_for('trash_list') }}" class="back-link">← Corbeille</a>
+    {% else %}
       <a href="{{ url_for('browse', subpath=parent_path) if parent_path else url_for('browse') }}"
          class="back-link">← Retour</a>
+    {% endif %}
     <h1 id="preview-title">{{ filename }}</h1>
+    {% if not from_trash %}
     <button type="button" id="rename-toggle" class="btn-icon" title="Renommer ce fichier">✏️</button>
     {% include '_preview_nav.html' %}
+    {% endif %}
   </div>
+  {% if not from_trash %}
   <div id="rename-inline" class="rename-inline" style="display:none">
     <input type="text" id="rename-input" class="rename-input" value="{{ filename }}">
     <button type="button" id="rename-save"   class="btn-rename-ok"     title="Valider">✓</button>
     <button type="button" id="rename-cancel" class="btn-rename-cancel" title="Annuler">✕</button>
     <span   id="rename-error" class="rename-error"></span>
   </div>
+  {% endif %}
   <div class="preview-meta">
     <span>Taille : <strong>{{ filesize }}</strong></span>
     <span>Modifié : <strong>{{ mtime.strftime('%d/%m/%Y %H:%M') }}</strong></span>
@@ -88,6 +96,7 @@
   <img src="{{ raw_url }}" alt="{{ filename }}">
 </div>
 
+{% if not from_trash %}
 <section class="card resize-card">
   <h2>Créer des copies redimensionnées</h2>
   <div class="resize-body">
@@ -365,5 +374,6 @@
   });
 })();
 </script>
+{% endif %}{# from_trash #}
 
 {% endblock %}

app/templates/preview_other.html

@@ -5,10 +5,14 @@
 
 <section class="card">
   <div class="preview-header">
+    {% if from_trash %}
+      <a href="{{ url_for('trash_list') }}" class="back-link">← Corbeille</a>
+    {% else %}
       <a href="{{ url_for('browse', subpath=parent_path) if parent_path else url_for('browse') }}"
          class="back-link">← Retour</a>
+    {% endif %}
     <h1>{{ filename }}</h1>
-    {% include '_preview_nav.html' %}
+    {% if not from_trash %}{% include '_preview_nav.html' %}{% endif %}
   </div>
   <div class="preview-meta">
     <span>Taille : <strong>{{ filesize }}</strong></span>

app/templates/preview_text.html

@@ -5,10 +5,14 @@
 
 <section class="card">
   <div class="preview-header">
+    {% if from_trash %}
+      <a href="{{ url_for('trash_list') }}" class="back-link">← Corbeille</a>
+    {% else %}
       <a href="{{ url_for('browse', subpath=parent_path) if parent_path else url_for('browse') }}"
          class="back-link">← Retour</a>
+    {% endif %}
     <h1>{{ filename }}</h1>
-    {% include '_preview_nav.html' %}
+    {% if not from_trash %}{% include '_preview_nav.html' %}{% endif %}
   </div>
   <div class="preview-meta">
     <span>Taille : <strong>{{ filesize }}</strong></span>