feat: sweep complet — tous les émojis → outline SVG icons

Templates modifiés (22 fichiers):
- _icons.html: +14 new icons (paperclip, external-link, sparkles, lightbulb, tag,
  file-text, save, upload, trending-up, zap, alert-triangle, user, eye-off)
- base.html: +8 JS icons, 🦎🐙🔑🔗👁📋🔲📑❓⚠️→SVG
- page_editor.html: 43→0 émojis (📎📄🔒🔗⭐📋📁✨📝🗄📑📊📅🗓🖼📥🌐✏💬💡 etc)
- settings.html: 30→0 (⚙️📋🏷🧩👥💾🙈👁🔒🌙☀️🌳📊📝⚠🦎✅🐙🔗✏🗑)
- local_workspace.html: 25→0 (📄📁✏🗑⚠📋➕)
- gitea_workspace.html: 25→0 (🔗📄📤🔄⚙📁📄🔒✏🗑💾)
- board.html: 13→0 (📁📊📋☰📈👥✕✓🗑⚡🔍)
- workspace.html: 11→0 (🏠🔑⚙📁🔗📂🐙)
- landing.html: 8→0 (📚🚀📝📊🦎🌐🔒⚡)
- trash.html, table_view, dashboard, accounts, card_detail, public_page,
  workspaces, team_load, notes, _header, detailed_board, card, board_fragment
- Ajouté import _icons.html aux fragments standalone
- 143 tests passent

app/templates/dashboard.html

@@ -1,5 +1,5 @@
 {% extends "base.html" %}
-{% block page_icon %}🏠{% endblock %}
+{% block page_icon %}{{ fd_icon("home",18) }}{% endblock %}
 {% block page_title %}Home{% endblock %}
 {% block title_prefix %}Home{% endblock %}
 
@@ -42,7 +42,7 @@
               border-radius: 6px; transition: background 0.15s; cursor: pointer; color: var(--text-primary); text-decoration: none;"
        onmouseover="this.style.background='var(--bg-hover)'"
        onmouseout="this.style.background='transparent'">
-      <span style="font-size:18px;">📁</span>
+      <span style="font-size:18px;">{{ fd_icon("folder",20) }}</span>
       <div style="flex:1; min-width:0;">
         <div style="font-weight:500; font-size:14px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap;">
           {{ repo.name }}
@@ -57,7 +57,7 @@
         <span style="font-size:12px; color: var(--text-dim);">🟡 {{ repo.language }}</span>
         {% endif %}
         {% if repo.private %}
-        <span style="font-size:12px; color: var(--text-dim);">🔒</span>
+        <span style="font-size:12px; color: var(--text-dim);">{{ fd_icon("lock",14) }}</span>
         {% endif %}
         <span style="font-size:12px; color: var(--text-dim);">→</span>
       </div>
@@ -66,7 +66,7 @@
 
     {% if not repos %}
     <div style="text-align:center; padding:48px; color:var(--text-dim);">
-      <div style="font-size:48px; margin-bottom:16px;">📭</div>
+      <div style="margin-bottom:16px;">{{ fd_icon("inbox",48) }}</div>
       <h3 style="color:var(--text-secondary);">Aucun projet trouvé</h3>
       <p style="margin-top:8px;">
         {% if search %}