fix: derniers émojis — workspaces 🏠, hover actions, sidebar context menu

- workspaces.html: 🏠→home SVG (page_icon, header)
- local_workspace.html: ✏️🗑 ✕→SVG (rename, delete, clear buttons, rename modal)
- base.html: ✏️🗑️📁📄→SVG (context menus Rename/Delete/New File/Folder)
  + pageIcon default '📁'→'folder', modal title '📁 New Folder'→SVG
- 143 tests passent

app/templates/workspaces.html

@@ -1,11 +1,11 @@
 {% extends "base.html" %}
 {% block page_title %}Workspaces{% endblock %}
 {% block title_prefix %}Workspaces{% endblock %}
-{% block page_icon %}🏠{% endblock %}
+{% block page_icon %}{{ fd_icon("home",18) }}{% endblock %}
 
 {% block topbar %}
 {% set breadcrumb_items = [{"label": "Workspaces", "url": None}] %}
-{% set page_icon = "🏠" %}
+{% set page_icon = "home" %}
 {% set right_actions = '<a href="/auth/login?provider=local" class="topbar-btn" title="Login">🔑</a><a href="/accounts/settings" class="topbar-btn" title="Settings">⚙</a>' %}
 {% include '_header.html' %}
 {% endblock %}
@@ -51,7 +51,7 @@
 <div class="ws-page" x-data="workspacesPage()">
 
   <div class="ws-header">
-    <h1>🏠 Workspaces</h1>
+    <h1>{{ fd_icon("home",20) }} Workspaces</h1>
   </div>
 
   <!-- ── Local Workspaces ── -->