fix(core): resolve 68 compiler errors and stabilize Svelte 5 reactivity

- Fixed 'Captured initial value' warnings in 65+ components by implementing
  proper sync effects with 'untrack' and derived states.
- Hardened Event Settings JSON editors using a temporary string-buffer pattern
  to safely decouple object-based data from CodeMirror's string requirements.
- Resolved strict TypeScript mismatches across core routes (Accounts, Sites, etc.)
  and improved property indexing safety in views.
- Patched Flowbite-Svelte Drawer transitions for Svelte 5 compatibility using
  prop spreading.
- Added comprehensive safety comments to high-risk reactivity blocks.
- Synchronized 'ae_types.ts' with V3 backend models.

src/lib/elements/element_input_file.svelte

@@ -297,7 +297,7 @@
         return processed_file_list;
     }
 
-    function remove_file_from_filelist(index) {
+    function remove_file_from_filelist(index: number) {
         console.log('*** remove_file_from_filelist() ***');
 
         // Can not use something like this because it is readonly:
@@ -306,7 +306,7 @@
 
         let input_element = document.querySelector(
             'input[type="file"].svelte_input_file_element'
-        );
+        ) as HTMLInputElement;
 
         if (!input_element) {
             console.error('Could not find the input element.');