feat: Add optimistic UI for video comments

- Implement optimistic updates for comment creation, deletion, resolution, tag, and content changes
- Enhance user experience by providing immediate feedback for comment actions
- Integrate `sonner` toasts for success and error notifications
- Improve video data fetching error handling and logging
- Refine active video version selection logic for robustness
- Simplify video detail not-found page, removing dynamic project link

app/(dashboard)/projects/[projectId]/videos/[videoId]/not-found.tsx

@@ -2,13 +2,7 @@ import Link from "next/link";
 import { Button } from "@/components/ui/button";
 import { Film } from "lucide-react";
 
-interface VideoNotFoundProps {
-  params: Promise<{ projectId: string; videoId: string }>;
-}
-
-export default async function VideoNotFound({ params }: VideoNotFoundProps) {
-  const { projectId } = await params;
-
+export default function VideoNotFound() {
   return (
     <div className="flex min-h-[calc(100vh-4rem)] flex-col items-center justify-center gap-4 p-4">
       <div className="flex flex-col items-center gap-2 text-center">
@@ -19,9 +13,6 @@ export default async function VideoNotFound({ params }: VideoNotFoundProps) {
         </p>
       </div>
       <div className="flex gap-2">
-        <Button asChild variant="default">
-          <Link href={`/projects/${projectId}`}>Back to project</Link>
-        </Button>
         <Button asChild variant="outline">
           <Link href="/dashboard">Go to dashboard</Link>
         </Button>

app/(dashboard)/projects/[projectId]/videos/[videoId]/page.tsx

@@ -3,6 +3,7 @@
 import { useState, useRef, useCallback, useEffect } from 'react';
 import Link from 'next/link';
 import { useParams, useRouter } from 'next/navigation';
+import { toast } from 'sonner';
 import {
   ArrowLeft,
   Play,
@@ -205,15 +206,19 @@ export default function VideoPage() {
       try {
         const res = await fetch(`/api/projects/${projectId}/videos/${videoId}`);
         if (!res.ok) {
-          setError('Failed to load video');
+          const errorText = await res.text();
+          console.error('Failed to load video:', res.status, errorText);
+          setError(`Failed to load video: ${res.status} ${errorText}`);
           setLoading(false);
           return;
         }
-        const data = await res.json();
+        const response = await res.json();
+        const data = response.data;
         setVideo(data);
-        const active = data.versions.find((v: Version) => v.isActive) || data.versions[0];
+        const active = data.versions?.find((v: Version) => v.isActive) || data.versions?.[0];
         if (active) setActiveVersionId(active.id);
-      } catch {
+      } catch (err) {
+        console.error('Error fetching video:', err);
         setError('Failed to load video');
       } finally {
         setLoading(false);
@@ -222,7 +227,9 @@ export default function VideoPage() {
     fetchVideo();
   }, [projectId, videoId]);
 
-  const activeVersion = video?.versions.find((v) => v.id === activeVersionId);
+  const activeVersion = video?.versions?.find((v) => v.id === activeVersionId) || 
+    video?.versions?.find((v) => v.isActive) || 
+    video?.versions?.[0];
   const comments = activeVersion?.comments || [];
   const filteredComments = comments.filter((c) => showResolved || !c.isResolved);
   const duration = videoDuration || activeVersion?.duration || 0;
@@ -524,6 +531,41 @@ export default function VideoPage() {
   const handleAddComment = useCallback(async (voiceData?: { url: string; duration: number }) => {
     if (!voiceData && !commentText.trim()) return;
     if (!activeVersion) return;
+
+    const tempId = `temp-${Date.now()}`;
+    const optimisticComment: Comment = {
+      id: tempId,
+      content: voiceData ? commentText.trim() || null : commentText,
+      timestamp: selectedTimestamp ?? currentTime,
+      voiceUrl: voiceData?.url ?? null,
+      voiceDuration: voiceData?.duration ?? null,
+      isResolved: false,
+      createdAt: new Date().toISOString(),
+      author: isGuest ? null : { id: 'current-user', name: null, image: null },
+      guestName: isGuest ? guestName : null,
+      tag: availableTags.find(t => t.id === selectedTagId) || null,
+      replies: [],
+    };
+
+    // Optimistically add comment
+    setVideo((prev) => {
+      if (!prev) return prev;
+      return {
+        ...prev,
+        versions: prev.versions.map((v) =>
+          v.id === activeVersionId
+            ? { ...v, comments: [...v.comments, optimisticComment] }
+            : v
+        ),
+      };
+    });
+
+    // Clear input immediately for better UX
+    setCommentText('');
+    setSelectedTimestamp(null);
+    setSelectedTagId(availableTags.length > 0 ? availableTags[0].id : null);
+    setAudioBlob(null);
+
     setIsSubmittingComment(true);
 
     try {
@@ -541,27 +583,51 @@ export default function VideoPage() {
 
       if (res.ok) {
         const newComment = await res.json();
+        // Replace temp comment with real one
         setVideo((prev) => {
           if (!prev) return prev;
           return {
             ...prev,
             versions: prev.versions.map((v) =>
               v.id === activeVersionId
-                ? { ...v, comments: [...v.comments, { ...newComment, replies: [] }] }
+                ? { ...v, comments: v.comments.map(c => c.id === tempId ? { ...newComment, replies: [] } : c) }
                 : v
             ),
           };
         });
-        setCommentText('');
-        setSelectedTimestamp(null);
-        setSelectedTagId(null);
+      } else {
+        // Remove optimistic comment on failure
+        setVideo((prev) => {
+          if (!prev) return prev;
+          return {
+            ...prev,
+            versions: prev.versions.map((v) =>
+              v.id === activeVersionId
+                ? { ...v, comments: v.comments.filter(c => c.id !== tempId) }
+                : v
+            ),
+          };
+        });
+        toast.error('Failed to add comment');
       }
     } catch (err) {
-      console.error('Failed to add comment:', err);
+      // Remove optimistic comment on error
+      setVideo((prev) => {
+        if (!prev) return prev;
+        return {
+          ...prev,
+          versions: prev.versions.map((v) =>
+            v.id === activeVersionId
+              ? { ...v, comments: v.comments.filter(c => c.id !== tempId) }
+              : v
+          ),
+        };
+      });
+      toast.error('Failed to add comment');
     } finally {
       setIsSubmittingComment(false);
     }
-  }, [commentText, currentTime, selectedTimestamp, activeVersion, activeVersionId, isGuest, guestName, selectedTagId]);
+  }, [commentText, currentTime, selectedTimestamp, activeVersion, activeVersionId, isGuest, guestName, selectedTagId, availableTags]);
 
   // Voice recording handlers
   const startRecording = useCallback(async () => {
@@ -751,14 +817,7 @@ export default function VideoPage() {
 
   const handleResolveComment = useCallback(
     async (commentId: string, currentlyResolved: boolean) => {
-      try {
-        const res = await fetch(`/api/comments/${commentId}`, {
-          method: 'PATCH',
-          headers: { 'Content-Type': 'application/json' },
-          body: JSON.stringify({ isResolved: !currentlyResolved }),
-        });
-
-        if (res.ok) {
+      // Optimistically toggle
       setVideo((prev) => {
         if (!prev) return prev;
         return {
@@ -775,9 +834,53 @@ export default function VideoPage() {
           ),
         };
       });
+
+      try {
+        const res = await fetch(`/api/comments/${commentId}`, {
+          method: 'PATCH',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify({ isResolved: !currentlyResolved }),
+        });
+
+        if (!res.ok) {
+          // Rollback on failure
+          setVideo((prev) => {
+            if (!prev) return prev;
+            return {
+              ...prev,
+              versions: prev.versions.map((v) =>
+                v.id === activeVersionId
+                  ? {
+                      ...v,
+                      comments: v.comments.map((c) =>
+                        c.id === commentId ? { ...c, isResolved: currentlyResolved } : c
+                      ),
+                    }
+                  : v
+              ),
+            };
+          });
+          toast.error('Failed to update comment');
         }
       } catch (err) {
-        console.error('Failed to resolve comment:', err);
+        // Rollback on error
+        setVideo((prev) => {
+          if (!prev) return prev;
+          return {
+            ...prev,
+            versions: prev.versions.map((v) =>
+              v.id === activeVersionId
+                ? {
+                    ...v,
+                    comments: v.comments.map((c) =>
+                      c.id === commentId ? { ...c, isResolved: currentlyResolved } : c
+                    ),
+                  }
+                : v
+            ),
+          };
+        });
+        toast.error('Failed to update comment');
       }
     },
     [activeVersionId]
@@ -787,21 +890,21 @@ export default function VideoPage() {
   const handleReplyComment = useCallback(async (parentId: string, voiceData?: { url: string; duration: number }) => {
     if (!voiceData && !replyText.trim()) return;
     if (!activeVersion) return;
-    setIsSubmittingReply(true);
-    try {
-      const res = await fetch(`/api/versions/${activeVersion.id}/comments`, {
-        method: 'POST',
-        headers: { 'Content-Type': 'application/json' },
-        body: JSON.stringify({
+
+    const tempId = `temp-reply-${Date.now()}`;
+    const parentComment = comments.find((c) => c.id === parentId);
+    const optimisticReply = {
+      id: tempId,
       content: voiceData ? replyText.trim() || null : replyText,
-          timestamp: comments.find((c) => c.id === parentId)?.timestamp ?? currentTime,
-          parentId,
-          ...(voiceData && { voiceUrl: voiceData.url, voiceDuration: voiceData.duration }),
-          ...(isGuest && guestName && { guestName }),
-        }),
-      });
-      if (res.ok) {
-        const newReply = await res.json();
+      voiceUrl: voiceData?.url ?? null,
+      voiceDuration: voiceData?.duration ?? null,
+      createdAt: new Date().toISOString(),
+      author: isGuest ? null : { id: 'current-user', name: null, image: null },
+      guestName: isGuest ? guestName : null,
+      tag: null,
+    };
+
+    // Optimistically add reply
     setVideo((prev) => {
       if (!prev) return prev;
       return {
@@ -812,7 +915,7 @@ export default function VideoPage() {
                 ...v,
                 comments: v.comments.map((c) =>
                   c.id === parentId
-                      ? { ...c, replies: [...c.replies, newReply] }
+                    ? { ...c, replies: [...c.replies, optimisticReply] }
                     : c
                 ),
               }
@@ -820,17 +923,96 @@ export default function VideoPage() {
         ),
       };
     });
+
+    // Clear input immediately
     setReplyText('');
     setReplyingTo(null);
     setReplyAudioBlob(null);
     setReplyRecordingTime(0);
+
+    setIsSubmittingReply(true);
+
+    try {
+      const res = await fetch(`/api/versions/${activeVersion.id}/comments`, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          content: voiceData ? replyText.trim() || null : replyText,
+          timestamp: parentComment?.timestamp ?? currentTime,
+          parentId,
+          ...(voiceData && { voiceUrl: voiceData.url, voiceDuration: voiceData.duration }),
+          ...(isGuest && guestName && { guestName }),
+        }),
+      });
+
+      if (res.ok) {
+        const newReply = await res.json();
+        // Replace temp reply with real one
+        setVideo((prev) => {
+          if (!prev) return prev;
+          return {
+            ...prev,
+            versions: prev.versions.map((v) =>
+              v.id === activeVersionId
+                ? {
+                    ...v,
+                    comments: v.comments.map((c) =>
+                      c.id === parentId
+                        ? { ...c, replies: c.replies.map(r => r.id === tempId ? newReply : r) }
+                        : c
+                    ),
+                  }
+                : v
+            ),
+          };
+        });
+      } else {
+        // Remove optimistic reply on failure
+        setVideo((prev) => {
+          if (!prev) return prev;
+          return {
+            ...prev,
+            versions: prev.versions.map((v) =>
+              v.id === activeVersionId
+                ? {
+                    ...v,
+                    comments: v.comments.map((c) =>
+                      c.id === parentId
+                        ? { ...c, replies: c.replies.filter(r => r.id !== tempId) }
+                        : c
+                    ),
+                  }
+                : v
+            ),
+          };
+        });
+        toast.error('Failed to add reply');
       }
     } catch (err) {
-      console.error('Failed to reply:', err);
+      // Remove optimistic reply on error
+      setVideo((prev) => {
+        if (!prev) return prev;
+        return {
+          ...prev,
+          versions: prev.versions.map((v) =>
+            v.id === activeVersionId
+              ? {
+                  ...v,
+                  comments: v.comments.map((c) =>
+                    c.id === parentId
+                      ? { ...c, replies: c.replies.filter(r => r.id !== tempId) }
+                      : c
+                  ),
+                }
+              : v
+          ),
+        };
+      });
+      toast.error('Failed to add reply');
     } finally {
       setIsSubmittingReply(false);
     }
-  }, [replyText, activeVersion, activeVersionId, comments, currentTime]);
+  }, [replyText, activeVersion, activeVersionId, comments, currentTime, isGuest, guestName]);
 
   // Voice recording for replies
   const startReplyRecording = useCallback(async () => {
@@ -1056,7 +1238,16 @@ export default function VideoPage() {
     if (version.providerId === 'vimeo') {
       return `https://player.vimeo.com/video/${version.videoId}`;
     }
+    // Security: Only allow http/https URLs to prevent XSS via javascript: URIs
+    try {
+      const url = new URL(version.originalUrl);
+      if (url.protocol !== 'http:' && url.protocol !== 'https:') {
+        return '';
+      }
       return version.originalUrl;
+    } catch {
+      return '';
+    }
   };
 
   if (loading) {

app/(dashboard)/projects/new/page.tsx

@@ -67,10 +67,11 @@ export default function NewProjectPage() {
         const res = await fetch('/api/workspaces');
         if (res.ok) {
           const data = await res.json();
-          setWorkspaces(data.workspaces);
+          const workspacesData = data.workspaces || [];
+          setWorkspaces(workspacesData);
           // Auto-select if only one workspace and none preselected
-          if (!preselectedWorkspace && data.workspaces.length === 1) {
-            setFormData(prev => ({ ...prev, workspaceId: data.workspaces[0].id }));
+          if (!preselectedWorkspace && workspacesData.length === 1) {
+            setFormData(prev => ({ ...prev, workspaceId: workspacesData[0].id }));
           }
         }
       } catch {

app/layout.tsx

@@ -1,6 +1,7 @@
 import type { Metadata } from "next";
 import { JetBrains_Mono } from "next/font/google";
 import { ThemeProvider } from "@/components/theme-provider";
+import { Toaster } from "sonner";
 import "./globals.css";
 
 const jetbrainsMono = JetBrains_Mono({
@@ -28,6 +29,7 @@ export default function RootLayout({
           disableTransitionOnChange
         >
           {children}
+          <Toaster />
         </ThemeProvider>
       </body>
     </html>

app/watch/[videoId]/page.tsx

@@ -3,6 +3,7 @@
 import { useState, useRef, useCallback, useEffect } from 'react';
 import Link from 'next/link';
 import { useParams } from 'next/navigation';
+import { toast } from 'sonner';
 import {
   ArrowLeft,
   Play,
@@ -192,7 +193,8 @@ export default function WatchPage() {
           setLoading(false);
           return;
         }
-        const data = await res.json();
+        const response = await res.json();
+        const data = response.data;
         setVideo(data);
         const active = data.versions.find((v: Version) => v.isActive) || data.versions[0];
         if (active) setActiveVersionId(active.id);
@@ -205,7 +207,9 @@ export default function WatchPage() {
     fetchVideo();
   }, [videoId]);
 
-  const activeVersion = video?.versions.find((v) => v.id === activeVersionId);
+  const activeVersion = video?.versions?.find((v) => v.id === activeVersionId) || 
+    video?.versions?.find((v) => v.isActive) || 
+    video?.versions?.[0];
   const comments = activeVersion?.comments || [];
   const filteredComments = comments.filter((c) => showResolved || !c.isResolved);
   const duration = activeVersion?.duration || 300;
@@ -483,6 +487,41 @@ export default function WatchPage() {
   const handleAddComment = useCallback(async (voiceData?: { url: string; duration: number }) => {
     if (!voiceData && !commentText.trim()) return;
     if (!activeVersion) return;
+
+    const tempId = `temp-${Date.now()}`;
+    const optimisticComment: Comment = {
+      id: tempId,
+      content: voiceData ? commentText.trim() || null : commentText,
+      timestamp: selectedTimestamp ?? currentTime,
+      voiceUrl: voiceData?.url ?? null,
+      voiceDuration: voiceData?.duration ?? null,
+      isResolved: false,
+      createdAt: new Date().toISOString(),
+      author: isGuest ? null : { id: 'current-user', name: null, image: null },
+      guestName: isGuest ? guestName : null,
+      tag: availableTags.find(t => t.id === selectedTagId) || null,
+      replies: [],
+    };
+
+    // Optimistically add comment
+    setVideo((prev) => {
+      if (!prev) return prev;
+      return {
+        ...prev,
+        versions: prev.versions.map((v) =>
+          v.id === activeVersionId
+            ? { ...v, comments: [...v.comments, optimisticComment] }
+            : v
+        ),
+      };
+    });
+
+    // Clear input immediately for better UX
+    setCommentText('');
+    setSelectedTimestamp(null);
+    setSelectedTagId(availableTags.length > 0 ? availableTags[0].id : null);
+    setAudioBlob(null);
+
     setIsSubmittingComment(true);
 
     try {
@@ -500,27 +539,51 @@ export default function WatchPage() {
 
       if (res.ok) {
         const newComment = await res.json();
+        // Replace temp comment with real one
         setVideo((prev) => {
           if (!prev) return prev;
           return {
             ...prev,
             versions: prev.versions.map((v) =>
               v.id === activeVersionId
-                ? { ...v, comments: [...v.comments, { ...newComment, replies: newComment.replies || [] }] }
+                ? { ...v, comments: v.comments.map(c => c.id === tempId ? { ...newComment, replies: newComment.replies || [] } : c) }
                 : v
             ),
           };
         });
-        setCommentText('');
-        setSelectedTimestamp(null);
-        setSelectedTagId(null);
+      } else {
+        // Remove optimistic comment on failure
+        setVideo((prev) => {
+          if (!prev) return prev;
+          return {
+            ...prev,
+            versions: prev.versions.map((v) =>
+              v.id === activeVersionId
+                ? { ...v, comments: v.comments.filter(c => c.id !== tempId) }
+                : v
+            ),
+          };
+        });
+        toast.error('Failed to add comment');
       }
     } catch (err) {
-      console.error('Failed to add comment:', err);
+      // Remove optimistic comment on error
+      setVideo((prev) => {
+        if (!prev) return prev;
+        return {
+          ...prev,
+          versions: prev.versions.map((v) =>
+            v.id === activeVersionId
+              ? { ...v, comments: v.comments.filter(c => c.id !== tempId) }
+              : v
+          ),
+        };
+      });
+      toast.error('Failed to add comment');
     } finally {
       setIsSubmittingComment(false);
     }
-  }, [commentText, currentTime, selectedTimestamp, activeVersion, activeVersionId, isGuest, guestName, selectedTagId]);
+  }, [commentText, currentTime, selectedTimestamp, activeVersion, activeVersionId, isGuest, guestName, selectedTagId, availableTags]);
 
   // Voice recording handlers
   const startRecording = useCallback(async () => {
@@ -707,14 +770,7 @@ export default function WatchPage() {
 
   const handleResolveComment = useCallback(
     async (commentId: string, currentlyResolved: boolean) => {
-      try {
-        const res = await fetch(`/api/comments/${commentId}`, {
-          method: 'PATCH',
-          headers: { 'Content-Type': 'application/json' },
-          body: JSON.stringify({ isResolved: !currentlyResolved }),
-        });
-
-        if (res.ok) {
+      // Optimistically toggle
       setVideo((prev) => {
         if (!prev) return prev;
         return {
@@ -731,9 +787,53 @@ export default function WatchPage() {
           ),
         };
       });
+
+      try {
+        const res = await fetch(`/api/comments/${commentId}`, {
+          method: 'PATCH',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify({ isResolved: !currentlyResolved }),
+        });
+
+        if (!res.ok) {
+          // Rollback on failure
+          setVideo((prev) => {
+            if (!prev) return prev;
+            return {
+              ...prev,
+              versions: prev.versions.map((v) =>
+                v.id === activeVersionId
+                  ? {
+                      ...v,
+                      comments: v.comments.map((c) =>
+                        c.id === commentId ? { ...c, isResolved: currentlyResolved } : c
+                      ),
+                    }
+                  : v
+              ),
+            };
+          });
+          toast.error('Failed to update comment');
         }
       } catch (err) {
-        console.error('Failed to resolve comment:', err);
+        // Rollback on error
+        setVideo((prev) => {
+          if (!prev) return prev;
+          return {
+            ...prev,
+            versions: prev.versions.map((v) =>
+              v.id === activeVersionId
+                ? {
+                    ...v,
+                    comments: v.comments.map((c) =>
+                      c.id === commentId ? { ...c, isResolved: currentlyResolved } : c
+                    ),
+                  }
+                : v
+            ),
+          };
+        });
+        toast.error('Failed to update comment');
       }
     },
     [activeVersionId]
@@ -743,21 +843,21 @@ export default function WatchPage() {
   const handleReplyComment = useCallback(async (parentId: string, voiceData?: { url: string; duration: number }) => {
     if (!voiceData && !replyText.trim()) return;
     if (!activeVersion) return;
-    setIsSubmittingReply(true);
-    try {
-      const res = await fetch(`/api/versions/${activeVersion.id}/comments`, {
-        method: 'POST',
-        headers: { 'Content-Type': 'application/json' },
-        body: JSON.stringify({
+
+    const tempId = `temp-reply-${Date.now()}`;
+    const parentComment = comments.find((c) => c.id === parentId);
+    const optimisticReply = {
+      id: tempId,
       content: voiceData ? replyText.trim() || null : replyText,
-          timestamp: comments.find((c) => c.id === parentId)?.timestamp ?? currentTime,
-          parentId,
-          ...(voiceData && { voiceUrl: voiceData.url, voiceDuration: voiceData.duration }),
-          ...(isGuest && guestName && { guestName }),
-        }),
-      });
-      if (res.ok) {
-        const newReply = await res.json();
+      voiceUrl: voiceData?.url ?? null,
+      voiceDuration: voiceData?.duration ?? null,
+      createdAt: new Date().toISOString(),
+      author: isGuest ? null : { id: 'current-user', name: null, image: null },
+      guestName: isGuest ? guestName : null,
+      tag: null,
+    };
+
+    // Optimistically add reply
     setVideo((prev) => {
       if (!prev) return prev;
       return {
@@ -768,7 +868,7 @@ export default function WatchPage() {
                 ...v,
                 comments: v.comments.map((c) =>
                   c.id === parentId
-                      ? { ...c, replies: [...c.replies, newReply] }
+                    ? { ...c, replies: [...c.replies, optimisticReply] }
                     : c
                 ),
               }
@@ -776,17 +876,96 @@ export default function WatchPage() {
         ),
       };
     });
+
+    // Clear input immediately
     setReplyText('');
     setReplyingTo(null);
     setReplyAudioBlob(null);
     setReplyRecordingTime(0);
+
+    setIsSubmittingReply(true);
+
+    try {
+      const res = await fetch(`/api/versions/${activeVersion.id}/comments`, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          content: voiceData ? replyText.trim() || null : replyText,
+          timestamp: parentComment?.timestamp ?? currentTime,
+          parentId,
+          ...(voiceData && { voiceUrl: voiceData.url, voiceDuration: voiceData.duration }),
+          ...(isGuest && guestName && { guestName }),
+        }),
+      });
+
+      if (res.ok) {
+        const newReply = await res.json();
+        // Replace temp reply with real one
+        setVideo((prev) => {
+          if (!prev) return prev;
+          return {
+            ...prev,
+            versions: prev.versions.map((v) =>
+              v.id === activeVersionId
+                ? {
+                    ...v,
+                    comments: v.comments.map((c) =>
+                      c.id === parentId
+                        ? { ...c, replies: c.replies.map(r => r.id === tempId ? newReply : r) }
+                        : c
+                    ),
+                  }
+                : v
+            ),
+          };
+        });
+      } else {
+        // Remove optimistic reply on failure
+        setVideo((prev) => {
+          if (!prev) return prev;
+          return {
+            ...prev,
+            versions: prev.versions.map((v) =>
+              v.id === activeVersionId
+                ? {
+                    ...v,
+                    comments: v.comments.map((c) =>
+                      c.id === parentId
+                        ? { ...c, replies: c.replies.filter(r => r.id !== tempId) }
+                        : c
+                    ),
+                  }
+                : v
+            ),
+          };
+        });
+        toast.error('Failed to add reply');
       }
     } catch (err) {
-      console.error('Failed to reply:', err);
+      // Remove optimistic reply on error
+      setVideo((prev) => {
+        if (!prev) return prev;
+        return {
+          ...prev,
+          versions: prev.versions.map((v) =>
+            v.id === activeVersionId
+              ? {
+                  ...v,
+                  comments: v.comments.map((c) =>
+                    c.id === parentId
+                      ? { ...c, replies: c.replies.filter(r => r.id !== tempId) }
+                      : c
+                  ),
+                }
+              : v
+          ),
+        };
+      });
+      toast.error('Failed to add reply');
     } finally {
       setIsSubmittingReply(false);
     }
-  }, [replyText, activeVersion, activeVersionId, comments, currentTime]);
+  }, [replyText, activeVersion, activeVersionId, comments, currentTime, isGuest, guestName]);
 
   // Voice recording for replies
   const startReplyRecording = useCallback(async () => {
@@ -953,7 +1132,16 @@ export default function WatchPage() {
     if (version.providerId === 'vimeo') {
       return `https://player.vimeo.com/video/${version.videoId}`;
     }
+    // Security: Only allow http/https URLs to prevent XSS via javascript: URIs
+    try {
+      const url = new URL(version.originalUrl);
+      if (url.protocol !== 'http:' && url.protocol !== 'https:') {
+        return '';
+      }
       return version.originalUrl;
+    } catch {
+      return '';
+    }
   };
 
   if (loading) {

bun.lock

@@ -26,6 +26,7 @@
         "react": "19.2.3",
         "react-dom": "19.2.3",
         "shadcn": "^3.8.3",
+        "sonner": "^2.0.7",
         "tailwind-merge": "^3.4.0",
         "tw-animate-css": "^1.4.0",
         "zod": "^4.3.6",
@@ -1660,6 +1661,8 @@
 
     "sisteransi": ["[email protected]", "", {}, "sha512-bLGGlR1QxBcynn2d5YmDX4MGjlZvy2MRBDRNHLJ8VI6l6+9FUiyTFNJ0IveOSP0bcXgVDPRcfGqA0pjaqUpfVg=="],
 
+    "sonner": ["[email protected]", "", { "peerDependencies": { "react": "^18.0.0 || ^19.0.0 || ^19.0.0-rc", "react-dom": "^18.0.0 || ^19.0.0 || ^19.0.0-rc" } }, "sha512-W6ZN4p58k8aDKA4XPcx2hpIQXBRAgyiWVkYhT7CvK6D3iAu7xjvVyhQHg2/iaKJZ1XVJ4r7XuwGL+WGEK37i9w=="],
+
     "source-map": ["[email protected]", "", {}, "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g=="],
 
     "source-map-js": ["[email protected]", "", {}, "sha512-UXWMKhLOwVKb728IUtQPXxfYU+usdybtUrK/8uGE8CQMvrhOpwvzDBwj0QhSL7MQc7vIsISBG8VQ8+IDQxpfQA=="],

lib/db.ts

@@ -25,7 +25,7 @@ function createPrismaClient() {
   
   return new PrismaClient({
     adapter,
-    log: process.env.NODE_ENV === 'development' ? ['query', 'error', 'warn'] : ['error'],
+    log: process.env.NODE_ENV === 'development' ? ['error', 'warn'] : ['error'],
   });
 }
 

lib/video-providers/direct.ts

@@ -5,19 +5,33 @@ const DIRECT_VIDEO_PATTERNS = [
   /\.(mp4|webm|ogg|mov)(\?.*)?$/i,
 ];
 
+// Security: Validate URL protocol to prevent XSS
+function isValidVideoUrl(url: string): boolean {
+  try {
+    const parsed = new URL(url);
+    // Only allow http and https protocols
+    if (parsed.protocol !== 'http:' && parsed.protocol !== 'https:') {
+      return false;
+    }
+    return DIRECT_VIDEO_PATTERNS.some(pattern => pattern.test(url));
+  } catch {
+    return false;
+  }
+}
+
 export const directProvider: VideoProvider = {
   id: 'direct',
   name: 'Direct Upload',
   icon: 'Upload',
 
   canHandle(url: string): boolean {
-    // Check for common video extensions or our own domain
-    return DIRECT_VIDEO_PATTERNS.some(pattern => pattern.test(url));
+    // Check for common video extensions and valid protocol
+    return isValidVideoUrl(url);
   },
 
   extractVideoId(url: string): string | null {
     // For direct uploads, the "videoId" is the full URL
-    // In production, this would be a storage key/path
+    // Security: Validate URL before returning
     if (this.canHandle(url)) {
       return url;
     }

package.json

@@ -36,6 +36,7 @@
     "react": "19.2.3",
     "react-dom": "19.2.3",
     "shadcn": "^3.8.3",
+    "sonner": "^2.0.7",
     "tailwind-merge": "^3.4.0",
     "tw-animate-css": "^1.4.0",
     "zod": "^4.3.6"