fix(admin): replace navigation.retry() with goto() after flush

Fixed navigation guards in all forms that were calling the non-existent
navigation.retry() method. After canceling navigation and flushing autosave,
now properly uses goto() to navigate to the intended destination.

Files fixed:
- ProjectForm.svelte
- EssayForm.svelte
- PhotoPostForm.svelte
- SimplePostForm.svelte
- posts/[id]/edit/+page.svelte

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

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

src/lib/components/admin/EssayForm.svelte

@@ -173,7 +173,10 @@ $effect(() => {
 			navigation.cancel()
 			try {
 				await autoSave.flush()
-				navigation.retry()
+				// Navigate to the intended destination after flush completes
+				if (navigation.to?.url) {
+					goto(navigation.to.url.pathname + navigation.to.url.search)
+				}
 			} catch (error) {
 				console.error('Autosave flush failed:', error)
 			}

src/lib/components/admin/PhotoPostForm.svelte

@@ -177,7 +177,10 @@ $effect(() => {
 			navigation.cancel()
 			try {
 				await autoSave.flush()
-				navigation.retry()
+				// Navigate to the intended destination after flush completes
+				if (navigation.to?.url) {
+					goto(navigation.to.url.pathname + navigation.to.url.search)
+				}
 			} catch (error) {
 				console.error('Autosave flush failed:', error)
 			}

src/lib/components/admin/ProjectForm.svelte

@@ -189,7 +189,10 @@
 			navigation.cancel()
 			try {
 				await autoSave.flush()
-				navigation.retry()
+				// Navigate to the intended destination after flush completes
+				if (navigation.to?.url) {
+					goto(navigation.to.url.pathname + navigation.to.url.search)
+				}
 			} catch (error) {
 				console.error('Autosave flush failed:', error)
 				toast.error('Failed to save changes')

src/lib/components/admin/SimplePostForm.svelte

@@ -178,7 +178,10 @@ beforeNavigate(async (navigation) => {
 		navigation.cancel()
 		try {
 			await autoSave.flush()
-			navigation.retry()
+			// Navigate to the intended destination after flush completes
+			if (navigation.to?.url) {
+				goto(navigation.to.url.pathname + navigation.to.url.search)
+			}
 		} catch (error) {
 			console.error('Autosave flush failed:', error)
 		}

src/routes/admin/posts/[id]/edit/+page.svelte

@@ -390,7 +390,10 @@ onMount(async () => {
 			navigation.cancel()
 			try {
 				await autoSave.flush()
-				navigation.retry()
+				// Navigate to the intended destination after flush completes
+				if (navigation.to?.url) {
+					goto(navigation.to.url.pathname + navigation.to.url.search)
+				}
 			} catch (error) {
 				console.error('Autosave flush failed:', error)
 			}