fix(mobile): restore images on repost, improve media library 404 error, null-safe stripHtml

- Pass post.image[] as JSON prefillImages param when prefilling compose from an existing post (repost/edit/retry), replacing the broken single-image prefillImagePath/prefillImageId approach
- MediaLibraryModal now shows the attempted URL and a clear explanation on 404, making it easier to diagnose if the Postiz version does not expose GET /media
- stripHtml accepts null/undefined input and returns "" instead of throwing

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

artifacts/postiz-mobile/app/(tabs)/compose.tsx

@@ -68,12 +68,11 @@ export default function ComposeScreen() {
   const insets = useSafeAreaInsets();
   const { workspaces, clients, isConfigured } = usePostiz();
   const queryClient = useQueryClient();
-  const { prefillContent, prefillIntegrationIds, prefillImagePath, prefillImageId } =
+  const { prefillContent, prefillIntegrationIds, prefillImages } =
     useLocalSearchParams<{
       prefillContent?: string;
       prefillIntegrationIds?: string;
-      prefillImagePath?: string;
-      prefillImageId?: string;
+      prefillImages?: string;
     }>();
 
   const [content, setContent] = useState("");
@@ -95,12 +94,23 @@ export default function ComposeScreen() {
     if (prefillIntegrationIds) {
       setSelectedChannels(String(prefillIntegrationIds).split(",").filter(Boolean));
     }
-    if (prefillImagePath && prefillImageId) {
-      // Prefilled image has unknown workspace; associate with first workspace
-      const wsId = workspaces[0]?.id ?? "";
-      setMediaItems([{ type: "uploaded", id: String(prefillImageId), path: String(prefillImagePath), workspaceId: wsId }]);
+    if (prefillImages && workspaces.length > 0) {
+      try {
+        const images: Array<{ id: string; path: string }> = JSON.parse(String(prefillImages));
+        const wsId = workspaces[0]?.id ?? "";
+        setMediaItems(
+          images
+            .filter((img) => img?.id && img?.path)
+            .map((img): MediaItem => ({
+              type: "uploaded",
+              id: img.id,
+              path: img.path,
+              workspaceId: wsId,
+            }))
+        );
+      } catch {}
     }
-  }, [prefillContent, prefillIntegrationIds, prefillImagePath, prefillImageId, workspaces]);
+  }, [prefillContent, prefillIntegrationIds, prefillImages, workspaces]);
 
   useEffect(() => {
     if (prefillContent) return;

artifacts/postiz-mobile/app/(tabs)/posts.tsx

@@ -152,13 +152,14 @@ export default function PostsScreen() {
 
   const handlePrefillCompose = (post: PostizPost) => {
     const integrations = post.integrations ?? (post.integration ? [post.integration] : []);
-    router.push({
-      pathname: "/(tabs)/compose",
-      params: {
-        prefillContent: stripHtml(post.content),
-        prefillIntegrationIds: integrations.map((i) => i.id).join(","),
-      },
-    });
+    const params: Record<string, string> = {
+      prefillContent: stripHtml(post.content),
+      prefillIntegrationIds: integrations.map((i) => i.id).join(","),
+    };
+    if (post.image?.length) {
+      params.prefillImages = JSON.stringify(post.image);
+    }
+    router.push({ pathname: "/(tabs)/compose", params });
   };
 
   const startReschedule = (post: PostizPost) => {

artifacts/postiz-mobile/components/MediaLibraryModal.tsx

@@ -66,12 +66,20 @@ export function MediaLibraryModal({ visible, workspaces, defaultWorkspaceId, max
     if (!activeWorkspace) return;
     setLoading(true);
     setError(null);
+    const url = `${activeWorkspace.baseUrl}/media`;
     try {
       // eslint-disable-next-line no-undef
-      const res = await globalThis.fetch(`${activeWorkspace.baseUrl}/media`, {
+      const res = await globalThis.fetch(url, {
         headers: { Authorization: activeWorkspace.apiKey },
       });
-      if (!res.ok) throw new Error(`HTTP ${res.status}`);
+      if (!res.ok) {
+        if (res.status === 404) {
+          throw new Error(
+            `Media listing endpoint not found (404).\nURL tried: ${url}\n\nThis feature requires Postiz to expose GET /media in its public API. Your version may not support it yet.`
+          );
+        }
+        throw new Error(`HTTP ${res.status} — ${url}`);
+      }
       const data = await res.json();
       const list: RawMediaItem[] = Array.isArray(data)
         ? data

artifacts/postiz-mobile/lib/stripHtml.ts

@@ -1,4 +1,5 @@
-export function stripHtml(html: string): string {
+export function stripHtml(html: string | null | undefined): string {
+  if (!html) return "";
   // Decode entities first so encoded tags like <p> are also stripped
   let s = html
     .replace(/&/g, "&")