Prevent invalid mxc from getting used

fix: detect muted rooms with empty actions array

The mute detection was checking for `actions[0] === "dont_notify"` but
Cinny sets `actions: []` (empty array) when muting a room, which is
the correct behavior per Matrix spec where empty actions means no
notification.

This caused muted rooms to still show unread badges and contribute to
space badge counts.

Fixes the isMutedRule check to handle both:
- Empty actions array (current Matrix spec)
- "dont_notify" string (deprecated but may exist in older rules)

src/app/components/editor/autocomplete/EmoticonAutocomplete.tsx

@@ -88,6 +88,8 @@ export function EmoticonAutocomplete({
       {autoCompleteEmoticon.map((emoticon) => {
         const isCustomEmoji = 'url' in emoticon;
         const key = isCustomEmoji ? emoticon.url : emoticon.unicode;
+        const customEmojiUrl = mxcUrlToHttp(mx, key, useAuthentication);
+
         return (
           <MenuItem
             key={emoticon.shortcode + key}
@@ -98,11 +100,11 @@ export function EmoticonAutocomplete({
             }
             onClick={() => handleAutocomplete(key, emoticon.shortcode)}
             before={
-              isCustomEmoji ? (
+              isCustomEmoji && customEmojiUrl ? (
                 <Box
                   shrink="No"
                   as="img"
-                  src={mxcUrlToHttp(mx, key, useAuthentication) || key}
+                  src={customEmojiUrl}
                   alt={emoticon.shortcode}
                   style={{ width: toRem(24), height: toRem(24), objectFit: 'contain' }}
                 />

src/app/components/emoji-board/EmojiBoard.tsx

@@ -202,8 +202,7 @@ function EmojiSidebar({ activeGroupAtom, packs, onScrollToGroup }: EmojiSidebarP
             if (!label) label = isUserId(pack.id) ? 'Personal Pack' : mx.getRoom(pack.id)?.name;
 
             const url =
-              mxcUrlToHttp(mx, pack.getAvatarUrl(usage) ?? '', useAuthentication) ||
-              pack.meta.avatar;
+              mxcUrlToHttp(mx, pack.getAvatarUrl(usage) ?? '', useAuthentication) ?? undefined;
 
             return (
               <ImageGroupIcon
@@ -266,7 +265,7 @@ function StickerSidebar({ activeGroupAtom, packs, onScrollToGroup }: StickerSide
           if (!label) label = isUserId(pack.id) ? 'Personal Pack' : mx.getRoom(pack.id)?.name;
 
           const url =
-            mxcUrlToHttp(mx, pack.getAvatarUrl(usage) ?? '', useAuthentication) || pack.meta.avatar;
+            mxcUrlToHttp(mx, pack.getAvatarUrl(usage) ?? '', useAuthentication) ?? undefined;
 
           return (
             <ImageGroupIcon

src/app/components/emoji-board/components/Item.tsx

@@ -68,7 +68,7 @@ export function CustomEmojiItem({ mx, useAuthentication, image }: CustomEmojiIte
         loading="lazy"
         className={css.CustomEmojiImg}
         alt={image.body || image.shortcode}
-        src={mxcUrlToHttp(mx, image.url, useAuthentication) ?? image.url}
+        src={mxcUrlToHttp(mx, image.url, useAuthentication) ?? ''}
       />
     </Box>
   );
@@ -98,7 +98,7 @@ export function StickerItem({ mx, useAuthentication, image }: StickerItemProps)
         loading="lazy"
         className={css.StickerImg}
         alt={image.body || image.shortcode}
-        src={mxcUrlToHttp(mx, image.url, useAuthentication) ?? image.url}
+        src={mxcUrlToHttp(mx, image.url, useAuthentication) ?? ''}
       />
     </Box>
   );

src/app/components/message/FileHeader.tsx

@@ -27,7 +27,8 @@ export function FileDownloadButton({ filename, url, mimeType, encInfo }: FileDow
 
   const [downloadState, download] = useAsyncCallback(
     useCallback(async () => {
-      const mediaUrl = mxcUrlToHttp(mx, url, useAuthentication) ?? url;
+      const mediaUrl = mxcUrlToHttp(mx, url, useAuthentication);
+      if (!mediaUrl) throw new Error('Invalid media URL');
       const fileContent = encInfo
         ? await downloadEncryptedMedia(mediaUrl, (encBuf) => decryptFile(encBuf, mimeType, encInfo))
         : await downloadMedia(mediaUrl);

src/app/components/message/content/AudioContent.tsx

@@ -54,7 +54,8 @@ export function AudioContent({
 
   const [srcState, loadSrc] = useAsyncCallback(
     useCallback(async () => {
-      const mediaUrl = mxcUrlToHttp(mx, url, useAuthentication) ?? url;
+      const mediaUrl = mxcUrlToHttp(mx, url, useAuthentication);
+      if (!mediaUrl) throw new Error('Invalid media URL');
       const fileContent = encInfo
         ? await downloadEncryptedMedia(mediaUrl, (encBuf) => decryptFile(encBuf, mimeType, encInfo))
         : await downloadMedia(mediaUrl);

src/app/components/message/content/FileContent.tsx

@@ -86,7 +86,8 @@ export function ReadTextFile({ body, mimeType, url, encInfo, renderViewer }: Rea
 
   const [textState, loadText] = useAsyncCallback(
     useCallback(async () => {
-      const mediaUrl = mxcUrlToHttp(mx, url, useAuthentication) ?? url;
+      const mediaUrl = mxcUrlToHttp(mx, url, useAuthentication);
+      if (!mediaUrl) throw new Error('Invalid media URL');
       const fileContent = encInfo
         ? await downloadEncryptedMedia(mediaUrl, (encBuf) => decryptFile(encBuf, mimeType, encInfo))
         : await downloadMedia(mediaUrl);
@@ -176,7 +177,8 @@ export function ReadPdfFile({ body, mimeType, url, encInfo, renderViewer }: Read
 
   const [pdfState, loadPdf] = useAsyncCallback(
     useCallback(async () => {
-      const mediaUrl = mxcUrlToHttp(mx, url, useAuthentication) ?? url;
+      const mediaUrl = mxcUrlToHttp(mx, url, useAuthentication);
+      if (!mediaUrl) throw new Error('Invalid media URL');
       const fileContent = encInfo
         ? await downloadEncryptedMedia(mediaUrl, (encBuf) => decryptFile(encBuf, mimeType, encInfo))
         : await downloadMedia(mediaUrl);
@@ -253,7 +255,8 @@ export function DownloadFile({ body, mimeType, url, info, encInfo }: DownloadFil
 
   const [downloadState, download] = useAsyncCallback(
     useCallback(async () => {
-      const mediaUrl = mxcUrlToHttp(mx, url, useAuthentication) ?? url;
+      const mediaUrl = mxcUrlToHttp(mx, url, useAuthentication);
+      if (!mediaUrl) throw new Error('Invalid media URL');
       const fileContent = encInfo
         ? await downloadEncryptedMedia(mediaUrl, (encBuf) => decryptFile(encBuf, mimeType, encInfo))
         : await downloadMedia(mediaUrl);

src/app/components/message/content/ImageContent.tsx

@@ -87,7 +87,8 @@ export const ImageContent = as<'div', ImageContentProps>(
 
     const [srcState, loadSrc] = useAsyncCallback(
       useCallback(async () => {
-        const mediaUrl = mxcUrlToHttp(mx, url, useAuthentication) ?? url;
+        const mediaUrl = mxcUrlToHttp(mx, url, useAuthentication);
+        if (!mediaUrl) throw new Error('Invalid media URL');
         if (encInfo) {
           const fileContent = await downloadEncryptedMedia(mediaUrl, (encBuf) =>
             decryptFile(encBuf, mimeType ?? FALLBACK_MIMETYPE, encInfo)

src/app/components/message/content/ThumbnailContent.tsx

@@ -23,7 +23,8 @@ export function ThumbnailContent({ info, renderImage }: ThumbnailContentProps) {
         throw new Error('Failed to load thumbnail');
       }
 
-      const mediaUrl = mxcUrlToHttp(mx, thumbMxcUrl, useAuthentication) ?? thumbMxcUrl;
+      const mediaUrl = mxcUrlToHttp(mx, thumbMxcUrl, useAuthentication);
+      if (!mediaUrl) throw new Error('Invalid media URL');
       if (encInfo) {
         const fileContent = await downloadEncryptedMedia(mediaUrl, (encBuf) =>
           decryptFile(encBuf, thumbInfo.mimetype ?? FALLBACK_MIMETYPE, encInfo)

src/app/components/message/content/VideoContent.tsx

@@ -81,7 +81,8 @@ export const VideoContent = as<'div', VideoContentProps>(
 
     const [srcState, loadSrc] = useAsyncCallback(
       useCallback(async () => {
-        const mediaUrl = mxcUrlToHttp(mx, url, useAuthentication) ?? url;
+        const mediaUrl = mxcUrlToHttp(mx, url, useAuthentication);
+        if (!mediaUrl) throw new Error('Invalid media URL');
         const fileContent = encInfo
           ? await downloadEncryptedMedia(mediaUrl, (encBuf) =>
               decryptFile(encBuf, mimeType, encInfo)

src/app/features/room/RoomTimeline.tsx

@@ -1048,7 +1048,7 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
             collapse={collapse}
             highlight={highlighted}
             edit={editId === mEventId}
-            canDelete={canRedact || canDeleteOwn}
+            canDelete={canRedact || (canDeleteOwn && mEvent.getSender() === mx.getUserId())}
             canSendReaction={canSendReaction}
             canPinEvent={canPinEvent}
             imagePackRooms={imagePackRooms}
@@ -1130,7 +1130,7 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
             collapse={collapse}
             highlight={highlighted}
             edit={editId === mEventId}
-            canDelete={canRedact || canDeleteOwn}
+            canDelete={canRedact || (canDeleteOwn && mEvent.getSender() === mx.getUserId())}
             canSendReaction={canSendReaction}
             canPinEvent={canPinEvent}
             imagePackRooms={imagePackRooms}
@@ -1248,7 +1248,7 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
             messageLayout={messageLayout}
             collapse={collapse}
             highlight={highlighted}
-            canDelete={canRedact || canDeleteOwn}
+            canDelete={canRedact || (canDeleteOwn && mEvent.getSender() === mx.getUserId())}
             canSendReaction={canSendReaction}
             canPinEvent={canPinEvent}
             imagePackRooms={imagePackRooms}

src/app/utils/room.ts

@@ -160,7 +160,8 @@ export const getOrphanParents = (roomToParents: RoomToParents, roomId: string):
 };
 
 export const isMutedRule = (rule: IPushRule) =>
-  rule.actions[0] === 'dont_notify' && rule.conditions?.[0]?.kind === 'event_match';
+  // Check for empty actions (new spec) or dont_notify (deprecated)
+  (rule.actions.length === 0 || rule.actions[0] === 'dont_notify') && rule.conditions?.[0]?.kind === 'event_match';
 
 export const findMutedRule = (overrideRules: IPushRule[], roomId: string) =>
   overrideRules.find((rule) => rule.rule_id === roomId && isMutedRule(rule));