Media browser: recursive scan entire content/ tree, /-media/ URL prefix, editor change detection fix

- handleMediaList() now scans content/ recursively for all media files
- URLs use /-media/ prefix mapping directly to content/ (no special cases)
- index.php: added /-media/ route, kept /-assets/ for backward compat
- editor-toolbar.js: fixed editor.on('change') placement (was inside switchMode)
- content-edit.php and content-new.php: back-btn unsaved-changes detection
- Removed unused __editorCleanup global

config.json

@@ -1,19 +1,15 @@
 {
     "site_title": "CodePress",
     "content_dir": "content",
-    "templates_dir": "engine/templates",
+    "templates_dir": "cms\/templates",
     "default_page": "index",
-    "theme": {
-        "header_color": "#0a369d",
-        "header_font_color": "#ffffff",
-        "navigation_color": "#2754b4",
-        "navigation_font_color": "#ffffff",
-        "sidebar_background": "#f8f9fa",
-        "sidebar_border": "#dee2e6"
-    },
+    "active_theme": "default",
     "language": {
         "default": "nl",
-        "available": ["nl", "en"]
+        "available": [
+            "nl",
+            "en"
+        ]
     },
     "seo": {
         "description": "CodePress CMS - Lightweight file-based content management system",
@@ -21,11 +17,11 @@
     },
     "author": {
         "name": "E. Noorlander",
-        "website": "https://noorlander.info"
+        "website": "https:\/\/noorlander.info"
     },
     "features": {
         "auto_link_pages": true,
         "search_enabled": true,
         "breadcrumbs_enabled": true
     }
-}
+}