fix: library row icons → outline SVG + context menu width

- library.html L591: item.icon (emoji) → self._renderIcon('file')
- library.html: +_renderIcon() helper with validNames filter
- app.css: context-menu min-width:200px → width:max-content + max-width:240px
- 143 tests passent

app/templates/library.html

@@ -588,7 +588,7 @@ function libraryPage() {
         if (isFolder) {
           html += '<span class="row-icon"><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M3 7a2 2 0 0 1 2-2h4l2 2h8a2 2 0 0 1 2 2v9a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V7z"/></svg></span>';
         } else {
-          html += '<span class="row-icon">' + (item.icon || '\ud83d\udcc4') + '</span>';
+          html += '<span class="row-icon">' + self._renderIcon(item.icon, 'file') + '</span>';
         }
         // Title or rename input
         if (isRenaming) {
@@ -617,6 +617,13 @@ function libraryPage() {
 
     _escHtml(s) { var d=document.createElement('div'); d.textContent = s||''; return d.innerHTML; },
     _escAttr(s) { return String(s||'').replace(/&/g,'&amp;').replace(/"/g,'&quot;').replace(/</g,'&lt;').replace(/>/g,'&gt;'); },
+    _renderIcon(icon, fallback) {
+      var name = icon || fallback || 'file';
+      // Only allow known icon names, otherwise use fallback
+      var valid = ['folder','file','star','link','trash','book','home','settings','lock','globe','image','edit','calendar','users','user','search','tag','bar-chart','grid','list','align-left','zap','paperclip','key','refresh','upload'];
+      if (valid.indexOf(name) === -1) name = fallback || 'file';
+      return getSvgIcon(name, 14);
+    },
 
     _recomputeFlatItems() {
       var result = [];

static/css/app.css

@@ -684,7 +684,8 @@ input, select, textarea { font-family: inherit; color: inherit; }
   border: 1px solid var(--border-light);
   border-radius: var(--radius-md);
   box-shadow: 0 8px 24px rgba(0,0,0,0.4);
-  min-width: 200px;
+  width: max-content;
+  max-width: 240px;
   padding: var(--space-xs) 0;
   z-index: 1000;
   display: none;