Add independent settings access to AI Tools component

- Added a dedicated gear button to open the AI modal directly to the Settings tab.
- Resolved the 'chicken and egg' problem where settings were inaccessible if the AI process failed.
- Improved layout consistency with inline-flex wrapper.

src/lib/ae_elements/AE_AITools.svelte

@@ -114,7 +114,7 @@
     }
 </script>
 
-<div class="ae-ai-tools-wrapper inline-block">
+<div class="ae-ai-tools-wrapper inline-flex items-center gap-1">
     <!-- Trigger Button -->
     <button
         type="button"
@@ -133,6 +133,19 @@
         {/await}
     </button>
 
+    <!-- Quick Settings Button -->
+    <button
+        type="button"
+        onclick={() => {
+            active_tab = 'settings';
+            show_modal = true;
+        }}
+        class="btn btn-sm variant-soft-surface shadow-md"
+        title="AI Settings"
+    >
+        <Settings size="1.2em" />
+    </button>
+
     <!-- Unified AI Modal -->
     {#if show_modal}
         <Modal