Switch icons from a webfont to self-hosted SVG masks — the webfont was the actual problem

Self-hosting Font Awesome's font files (previous commit) didn't fix it either: every icon in the picker still failed identically. That rules out CDN/network blocking specifically and points to something in the browser blocking custom webfont loading altogether regardless of origin (common with strict anti-fingerprinting protection, e.g. Brave's font blocking or certain privacy extensions — @font-face loading is a well-known fingerprinting vector).

Replaced the whole mechanism: each of the 258 curated icons is now a real downloaded SVG file (static/icons/*.svg, sourced from Font Awesome 5 Free's official SVG package) displayed via CSS mask-image (.icon-svg in style.css) instead of a font glyph. A masked SVG isn't a font resource at all, so it isn't subject to webfont-blocking — and it still colors via the existing "color" style property (background-color:currentColor) and sizes via font-size (1em), so no change to how the widget's other controls work.

The "Icône" widget now stores just the icon's slug (e.g. "trophy") in a dedicated attribute instead of a full CSS class string, rendered by a new special_render (render_icone.py). Updated the add-gallery and the properties-panel picker modal to use the same mask technique for their previews, and element_add.py to validate the slug against the curated list. Removed the now-unused self-hosted Font Awesome CSS/webfont files and the <link> tags — no font dependency left for icons at all.

Verified end to end (gallery renders with real SVG previews, simulated add creates a correctly-attributed element, the SVG file is actually served, the per-element picker reflects the current icon). Full suite green (89).

templates/screen_edit.html

@@ -5,7 +5,6 @@
 {% block extra_head %}
 <link rel="stylesheet" href="{{ google_fonts_link }}">
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/4.1.1/animate.min.css">
-<link rel="stylesheet" href="{{ url_for('static', filename='fontawesome/css/all.min.css') }}">
 {% endblock %}
 {% block breadcrumb %}
 <li><a href="{{ url_for('game_dashboard', slug=game.slug) }}">{{ game.name }}</a></li>
@@ -163,19 +162,19 @@
     </div>
     <div class="floatPanelBody">
     <details class="propGroup">
-      <summary>🔤 Icônes (Font Awesome)</summary>
+      <summary>🔤 Icônes</summary>
       <div class="propGroupBody">
         <input type="text" class="input is-small" id="iconGallerySearch" placeholder="Rechercher une icône..." oninput="filterIconGallery(this.value)">
         <div class="iconGallery" id="iconGallery">
           {% for slug in fontawesome_icons %}
           <button type="button" class="iconGalleryTile" draggable="true"
-                  data-icon-class="fa-solid fa-{{ slug }}" data-icon-search="{{ slug }}"
-                  title="fa-{{ slug }}" onclick="addIconElement('fa-solid fa-{{ slug }}')">
-            <i class="fa-solid fa-{{ slug }}"></i>
+                  data-icon-class="{{ slug }}" data-icon-search="{{ slug }}"
+                  title="{{ slug }}" onclick="addIconElement('{{ slug }}')">
+            <i class="icon-svg" style="--icon-url:url('/static/icons/{{ slug }}.svg');"></i>
           </button>
           {% endfor %}
         </div>
-        <p class="help">Glisse une icône sur le canevas, ou clique dessus pour l'ajouter — sa couleur et sa taille se règlent ensuite dans ses propriétés ("Icône"). Sélection non exhaustive : n'importe quelle autre classe Font Awesome 5 reste utilisable en la tapant directement dans le réglage "Icône".</p>
+        <p class="help">Glisse une icône sur le canevas, ou clique dessus pour l'ajouter — sa couleur et sa taille se règlent ensuite dans ses propriétés ("Icône"). Sélection non exhaustive : d'autres icônes pourront être ajoutées à cette liste plus tard si besoin.</p>
       </div>
     </details>
 
@@ -196,8 +195,8 @@
           <div class="iconGallery" id="iconPickerGrid" style="max-height:50vh;">
             {% for slug in fontawesome_icons %}
             <button type="button" class="iconGalleryTile" data-icon-search="{{ slug }}"
-                    title="fa-{{ slug }}" onclick="chooseIcon('fa-solid fa-{{ slug }}')">
-              <i class="fa-solid fa-{{ slug }}"></i>
+                    title="{{ slug }}" onclick="chooseIcon('{{ slug }}')">
+              <i class="icon-svg" style="--icon-url:url('/static/icons/{{ slug }}.svg');"></i>
             </button>
             {% endfor %}
           </div>
@@ -372,7 +371,7 @@
           {% if c.key == 'icon_class' %}
           <div class="control">
             <button type="button" class="button is-fullwidth" onclick="openIconPicker()">
-              <span class="icon"><i id="iconPickerPreview" class="{{ c.value or c.default }}"></i></span>
+              <span class="icon"><i id="iconPickerPreview" class="icon-svg" style="--icon-url:url('/static/icons/{{ c.value or c.default }}.svg');"></i></span>
               <span>Changer l'icône</span>
             </button>
             <input type="hidden" name="ctrl_{{ c.key }}" id="field-{{ c.key }}" value="{{ c.value or c.default }}">
@@ -934,11 +933,11 @@ function closeIconPicker() {
   if (modal) modal.classList.remove('is-active');
 }
 
-function chooseIcon(iconClass) {
+function chooseIcon(iconSlug) {
   var input = document.getElementById('field-icon_class');
   var preview = document.getElementById('iconPickerPreview');
-  if (input) input.value = iconClass;
-  if (preview) preview.className = iconClass;
+  if (input) input.value = iconSlug;
+  if (preview) preview.style.setProperty('--icon-url', "url('/static/icons/" + iconSlug + ".svg')");
   closeIconPicker();
   submitPropsForm();
 }