Keep admin on page after editing sermon

Changed behavior so that editing a sermon no longer redirects to homepage.
Instead, it shows a success message and keeps the form filled for further edits.
Creating a new sermon still redirects to homepage as before.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

pages/admin.vue

@@ -535,6 +535,11 @@ async function handleSubmit() {
         body
       })
       success.value = 'Sermon updated successfully!'
+
+      // Refresh sermon list
+      await refreshSermons()
+
+      // Don't redirect or reset form when editing - stay on page with success message
     } else {
       // Create new sermon
       await $fetch('/api/sermons', {
@@ -542,7 +547,6 @@ async function handleSubmit() {
         body
       })
       success.value = 'Sermon created successfully!'
-    }
 
       // Reset form
       editingSermonId.value = null
@@ -561,6 +565,7 @@ async function handleSubmit() {
       setTimeout(() => {
         navigateTo('/')
       }, 2000)
+    }
   } catch (e: any) {
     error.value = e.data?.message || `Failed to ${editingSermonId.value ? 'update' : 'create'} sermon`
   } finally {