Add guest upload tokens and share-session aware permissions

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

@@ -17,6 +17,7 @@ interface ShareLinkData {
   id: string;
   token: string;
   allowGuests: boolean;
+  allowDownloads: boolean;
   hasPassword: boolean;
 }
 
@@ -38,6 +39,7 @@ export default function VideoSharePage({ params }: VideoSharePageProps) {
   const [shareUrl, setShareUrl] = useState<string | null>(null);
   const [hasPassword, setHasPassword] = useState(false);
   const [password, setPassword] = useState('');
+  const [allowDownloads, setAllowDownloads] = useState(false);
 
   useEffect(() => {
     params.then(({ projectId: nextProjectId, videoId: nextVideoId }) => {
@@ -65,10 +67,12 @@ export default function VideoSharePage({ params }: VideoSharePageProps) {
 
         setShareUrl(payload.data.shareUrl);
         setHasPassword(!!payload.data.link?.hasPassword);
+        setAllowDownloads(!!payload.data.link?.allowDownloads);
       } catch {
         setError('Failed to load share link');
         setShareUrl(null);
         setHasPassword(false);
+        setAllowDownloads(false);
       } finally {
         setLoading(false);
       }
@@ -94,7 +98,7 @@ export default function VideoSharePage({ params }: VideoSharePageProps) {
       const response = await fetch(`/api/projects/${projectId}/videos/${videoId}/share`, {
         method: 'POST',
         headers: { 'Content-Type': 'application/json' },
-        body: JSON.stringify({ allowGuests: true }),
+        body: JSON.stringify({ allowGuests: true, allowDownloads }),
       });
 
       const payload = (await response.json()) as ShareResponse;
@@ -105,6 +109,7 @@ export default function VideoSharePage({ params }: VideoSharePageProps) {
 
       setShareUrl(payload.data.shareUrl);
       setHasPassword(!!payload.data.link?.hasPassword);
+      setAllowDownloads(!!payload.data.link?.allowDownloads);
       setPassword('');
     } catch {
       setError('Failed to create share link');
@@ -132,6 +137,7 @@ export default function VideoSharePage({ params }: VideoSharePageProps) {
 
       setShareUrl(null);
       setHasPassword(false);
+      setAllowDownloads(false);
       setPassword('');
     } catch {
       setError('Failed to revoke share link');
@@ -165,6 +171,7 @@ export default function VideoSharePage({ params }: VideoSharePageProps) {
       const data = (payload as ShareResponse).data;
       setShareUrl(data.shareUrl);
       setHasPassword(!!data.link?.hasPassword);
+      setAllowDownloads(!!data.link?.allowDownloads);
       setPassword('');
     } catch {
       setError('Failed to update link security');
@@ -173,6 +180,34 @@ export default function VideoSharePage({ params }: VideoSharePageProps) {
     }
   };
 
+  const updateDownloadSetting = async (nextAllowDownloads: boolean) => {
+    if (!projectId || !videoId || !shareUrl) return;
+
+    setSubmitting(true);
+    setError('');
+
+    try {
+      const response = await fetch(`/api/projects/${projectId}/videos/${videoId}/share`, {
+        method: 'PATCH',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ allowDownloads: nextAllowDownloads }),
+      });
+      const payload = (await response.json().catch(() => null)) as ShareResponse | { error?: string } | null;
+      if (!response.ok || ('error' in (payload || {}) && payload?.error)) {
+        setError((payload as { error?: string } | null)?.error || 'Failed to update download setting');
+        return;
+      }
+      const data = (payload as ShareResponse).data;
+      setShareUrl(data.shareUrl);
+      setAllowDownloads(!!data.link?.allowDownloads);
+      setHasPassword(!!data.link?.hasPassword);
+    } catch {
+      setError('Failed to update download setting');
+    } finally {
+      setSubmitting(false);
+    }
+  };
+
   return (
     <div className="min-h-[calc(100vh-4rem)] flex items-start justify-center py-12 px-4">
       <div className="w-full max-w-xl space-y-6">
@@ -220,6 +255,29 @@ export default function VideoSharePage({ params }: VideoSharePageProps) {
                     Revoke Link
                   </Button>
                 </div>
+                <div className="rounded-lg border p-3 space-y-2">
+                  <div>
+                    <p className="text-sm font-medium">Video download</p>
+                    <p className="text-xs text-muted-foreground">Allow viewers with this link to download</p>
+                  </div>
+                  <div className="flex gap-2">
+                    <Button
+                      variant={allowDownloads ? 'default' : 'outline'}
+                      disabled={submitting || allowDownloads}
+                      onClick={() => updateDownloadSetting(true)}
+                    >
+                      Allow Download
+                    </Button>
+                    <Button
+                      variant={!allowDownloads ? 'default' : 'outline'}
+                      disabled={submitting || !allowDownloads}
+                      onClick={() => updateDownloadSetting(false)}
+                    >
+                      Block Download
+                    </Button>
+                  </div>
+                </div>
+
                 <div className="rounded-lg border p-3 space-y-2">
                   <div className="flex items-center gap-2 text-sm font-medium">
                     {hasPassword ? <ShieldCheck className="h-4 w-4 text-green-600" /> : <Lock className="h-4 w-4" />}

app/api/comments/[commentId]/route.ts

@@ -4,7 +4,10 @@ import { auth } from '@/lib/auth';
 import { r2Client, R2_BUCKET_NAME } from '@/lib/r2';
 import { DeleteObjectCommand } from '@aws-sdk/client-s3';
 import { rateLimit } from '@/lib/rate-limit';
+import { validateShareLinkAccess } from '@/lib/share-links';
+import { getShareSessionFromRequest } from '@/lib/share-session';
 import { apiErrors, successResponse, withCacheControl } from '@/lib/api-response';
+import { getGuestIdentityFromRequest } from '@/lib/guest-identity';
 
 type RouteParams = { params: Promise<{ commentId: string }> };
 
@@ -125,10 +128,8 @@ export async function PATCH(request: NextRequest, { params }: RouteParams) {
 
         const session = await auth();
         const { commentId } = await params;
-
+        const body = await request.json();
-        if (!session?.user?.id) {
+        const { content, isResolved, tagId, annotationData } = body;
-            return apiErrors.unauthorized();
-        }
 
         const comment = await db.comment.findUnique({
             where: { id: commentId },
@@ -138,9 +139,7 @@ export async function PATCH(request: NextRequest, { params }: RouteParams) {
                         video: {
                             include: {
                                 project: {
-                                    include: {
+                                    include: { members: true },
-                                        members: { where: { userId: session.user.id } },
-                                    },
                                 },
                             },
                         },
@@ -154,18 +153,25 @@ export async function PATCH(request: NextRequest, { params }: RouteParams) {
         }
 
         const project = comment.version.video.project;
-        const isOwner = project.ownerId === session.user.id;
+        const userId = session?.user?.id ?? null;
-        const isAuthor = comment.authorId === session.user.id;
+        const isOwner = userId === project.ownerId;
-        const isMember = project.members.length > 0;
+        const isAuthor = !!userId && comment.authorId === userId;
+        const isMember = !!userId && project.members.some((member) => member.userId === userId);
+        const guestIdentityId = !userId ? getGuestIdentityFromRequest(request) : null;
+        const isGuestAuthor = !userId
+            && !comment.authorId
+            && !!comment.guestIdentityId
+            && guestIdentityId === comment.guestIdentityId;
+        const canEditOwnContent = isAuthor || isGuestAuthor;
 
         // Check workspace membership for resolve permissions
         let isWorkspaceMember = false;
-        if (!isOwner && !isMember && session.user.id) {
+        if (!isOwner && !isMember && userId) {
             const wsMember = await db.workspaceMember.findUnique({
                 where: {
                     workspaceId_userId: {
                         workspaceId: project.workspaceId,
-                        userId: session.user.id,
+                        userId,
                     },
                 },
             });
@@ -173,19 +179,33 @@ export async function PATCH(request: NextRequest, { params }: RouteParams) {
                 where: { id: project.workspaceId },
                 select: { ownerId: true },
             });
-            isWorkspaceMember = !!wsMember || wsOwner?.ownerId === session.user.id;
+            isWorkspaceMember = !!wsMember || wsOwner?.ownerId === userId;
         }
 
-        const body = await request.json();
+        if (!userId && !isGuestAuthor) {
-        const { content, isResolved, tagId, annotationData } = body;
+            const shareSession = getShareSessionFromRequest(request, comment.version.video.id);
+            const shareAccess = shareSession
+                ? await validateShareLinkAccess({
+                    token: shareSession.token,
+                    projectId: project.id,
+                    videoId: comment.version.video.id,
+                    requiredPermission: 'COMMENT',
+                    passwordVerified: shareSession.passwordVerified,
+                })
+                : { hasAccess: false, canComment: false, canDownload: false, allowGuests: false, requiresPassword: false };
+            const hasGuestAccess = project.visibility === 'PUBLIC' || (shareAccess.canComment && shareAccess.allowGuests);
+            if (!hasGuestAccess) {
+                return apiErrors.forbidden('Access denied');
+            }
+        }
 
         // Only author can edit content or tag
-        if ((content !== undefined || tagId !== undefined || annotationData !== undefined) && !isAuthor) {
+        if ((content !== undefined || tagId !== undefined || annotationData !== undefined) && !canEditOwnContent) {
             return apiErrors.forbidden('Only the author can edit comment content');
         }
 
         // Owner, author, members, or workspace members can resolve/unresolve
-        if (isResolved !== undefined && !isOwner && !isAuthor && !isMember && !isWorkspaceMember) {
+        if (isResolved !== undefined && !isOwner && !canEditOwnContent && !isMember && !isWorkspaceMember) {
             return apiErrors.forbidden('Access denied');
         }
 
@@ -213,7 +233,26 @@ export async function PATCH(request: NextRequest, { params }: RouteParams) {
             },
         });
 
-        const response = successResponse(updatedComment);
+        const { guestIdentityId: _updatedGuestIdentityId, ...updatedCommentData } = updatedComment;
+        const response = successResponse({
+            ...updatedCommentData,
+            canEdit: canEditOwnContent,
+            canDelete: canEditOwnContent || isOwner,
+            replies: updatedComment.replies.map((reply) => {
+                const canEditReply = !!userId
+                    ? reply.authorId === userId
+                    : !!guestIdentityId
+                    && !reply.authorId
+                    && !!reply.guestIdentityId
+                    && reply.guestIdentityId === guestIdentityId;
+                const { guestIdentityId: _replyGuestIdentityId, ...replyData } = reply;
+                return {
+                    ...replyData,
+                    canEdit: canEditReply,
+                    canDelete: canEditReply || isOwner,
+                };
+            }),
+        });
         return withCacheControl(response, 'private, no-store');
     } catch (error) {
         console.error('Error updating comment:', error);
@@ -230,13 +269,18 @@ export async function DELETE(request: NextRequest, { params }: RouteParams) {
         const session = await auth();
         const { commentId } = await params;
 
-        if (!session?.user?.id) {
-            return apiErrors.unauthorized();
-        }
-
         const comment = await db.comment.findUnique({
             where: { id: commentId },
             include: {
+                version: {
+                    include: {
+                        video: {
+                            include: {
+                                project: true,
+                            },
+                        },
+                    },
+                },
                 replies: { select: { voiceUrl: true, imageUrl: true } },
             },
         });
@@ -245,9 +289,37 @@ export async function DELETE(request: NextRequest, { params }: RouteParams) {
             return apiErrors.notFound('Comment');
         }
 
-        const isAuthor = comment.authorId === session.user.id;
+        const userId = session?.user?.id ?? null;
+        const isAuthor = !!userId && comment.authorId === userId;
 
-        if (!isAuthor) {
+        let canDeleteOwnComment = isAuthor;
+        if (!userId) {
+            const guestIdentityId = getGuestIdentityFromRequest(request);
+            const isGuestAuthor = !comment.authorId
+                && !!comment.guestIdentityId
+                && guestIdentityId === comment.guestIdentityId;
+
+            if (isGuestAuthor) {
+                const project = comment.version.video.project;
+                const shareSession = getShareSessionFromRequest(request, comment.version.video.id);
+                const shareAccess = shareSession
+                    ? await validateShareLinkAccess({
+                        token: shareSession.token,
+                        projectId: project.id,
+                        videoId: comment.version.video.id,
+                        requiredPermission: 'COMMENT',
+                        passwordVerified: shareSession.passwordVerified,
+                    })
+                    : { hasAccess: false, canComment: false, canDownload: false, allowGuests: false, requiresPassword: false };
+                const hasGuestAccess = project.visibility === 'PUBLIC' || (shareAccess.canComment && shareAccess.allowGuests);
+                if (!hasGuestAccess) {
+                    return apiErrors.forbidden('Access denied');
+                }
+                canDeleteOwnComment = true;
+            }
+        }
+
+        if (!canDeleteOwnComment) {
             return apiErrors.forbidden('You can only delete your own comments');
         }
 

app/api/projects/[projectId]/tags/route.ts

@@ -2,19 +2,12 @@ import { NextRequest } from 'next/server';
 import { db } from '@/lib/db';
 import { auth } from '@/lib/auth';
 import { rateLimit } from '@/lib/rate-limit';
+import { validateShareLinkAccess } from '@/lib/share-links';
+import { getShareSessionFromRequest } from '@/lib/share-session';
 import { apiErrors, successResponse, withCacheControl } from '@/lib/api-response';
 
 type RouteParams = { params: Promise<{ projectId: string }> };
 
-// Default tags to create for new projects
-const DEFAULT_TAGS = [
-    { name: 'Feedback', color: '#3B82F6', position: 0 },
-    { name: 'Technical', color: '#EF4444', position: 1 },
-    { name: 'Creative', color: '#8B5CF6', position: 2 },
-    { name: 'Approved', color: '#22C55E', position: 3 },
-    { name: 'Urgent', color: '#F59E0B', position: 4 },
-];
-
 // Helper to check project access
 async function checkProjectAccess(projectId: string, userId: string) {
     const project = await db.project.findUnique({
@@ -51,36 +44,56 @@ export async function GET(request: NextRequest, { params }: RouteParams) {
     try {
         const session = await auth();
         const { projectId } = await params;
+        const videoId = request.nextUrl.searchParams.get('videoId');
 
-        if (!session?.user?.id) {
+        const project = await db.project.findUnique({
-            return apiErrors.unauthorized();
+            where: { id: projectId },
-        }
+            select: { id: true, visibility: true },
+        });
+        if (!project) return apiErrors.notFound('Project');
 
-        const { project } = await checkProjectAccess(projectId, session.user.id);
+        if (session?.user?.id) {
-        if (!project) {
+            const { project: accessibleProject } = await checkProjectAccess(projectId, session.user.id);
+            if (!accessibleProject) {
                 return apiErrors.notFound('Project');
             }
-
+        } else {
-        let tags = await db.commentTag.findMany({
+            let hasGuestAccess = project.visibility === 'PUBLIC';
-            where: { projectId },
+            if (!hasGuestAccess && videoId) {
-            orderBy: { position: 'asc' },
+                const video = await db.video.findFirst({
-        });
+                    where: { id: videoId, projectId },
-
+                    select: { id: true },
-        // Auto-create default tags if none exist (idempotent with skipDuplicates
-        // to handle race conditions from concurrent requests)
-        if (tags.length === 0) {
-            await db.commentTag.createMany({
-                data: DEFAULT_TAGS.map((tag) => ({ ...tag, projectId })),
-                skipDuplicates: true,
-            });
-            tags = await db.commentTag.findMany({
-                where: { projectId },
-                orderBy: { position: 'asc' },
                 });
+                if (video) {
+                    const shareSession = getShareSessionFromRequest(request, video.id);
+                    const shareAccess = shareSession
+                        ? await validateShareLinkAccess({
+                            token: shareSession.token,
+                            projectId,
+                            videoId: video.id,
+                            requiredPermission: 'COMMENT',
+                            passwordVerified: shareSession.passwordVerified,
+                        })
+                        : { hasAccess: false, canComment: false, canDownload: false, allowGuests: false, requiresPassword: false };
+                    hasGuestAccess = shareAccess.canComment && shareAccess.allowGuests;
+                }
             }
 
+            if (!hasGuestAccess) {
+                return apiErrors.forbidden('Access denied');
+            }
+        }
+
+        const tags = await db.commentTag.findMany({
+            where: { projectId },
+            orderBy: { position: 'asc' },
+        });
+
         const response = successResponse(tags);
-        return withCacheControl(response, 'private, max-age=120, stale-while-revalidate=300');
+        const cacheControl = session?.user?.id
+            ? 'private, max-age=120, stale-while-revalidate=300'
+            : 'private, no-cache';
+        return withCacheControl(response, cacheControl);
     } catch (error) {
         console.error('Error fetching tags:', error);
         return apiErrors.internalError('Failed to fetch tags');

app/api/projects/[projectId]/videos/[videoId]/route.ts

@@ -106,6 +106,8 @@ export async function GET(request: NextRequest, { params }: RouteParams) {
             isAuthenticated: !!session?.user?.id,
             currentUserId: session?.user?.id || null,
             currentUserName: session?.user?.name || null,
+            canDownload: access.hasAccess,
+            canManageTags: access.canEdit,
         });
 
         return withCacheControl(response, 'private, no-cache');

app/api/projects/[projectId]/videos/[videoId]/share/route.ts

@@ -30,8 +30,27 @@ async function requireShareManagementAccess(projectId: string, videoId: string,
   return { error: null, video };
 }
 
+function resolveShareBaseUrl(request: NextRequest): string {
+  const configuredBaseUrl = process.env.NEXTAUTH_URL ?? process.env.NEXT_PUBLIC_APP_URL;
+  const normalizedConfiguredBaseUrl = configuredBaseUrl?.trim();
+
+  if (normalizedConfiguredBaseUrl) {
+    const withProtocol = /^https?:\/\//i.test(normalizedConfiguredBaseUrl)
+      ? normalizedConfiguredBaseUrl
+      : `https://${normalizedConfiguredBaseUrl}`;
+
+    try {
+      return new URL(withProtocol).origin;
+    } catch {
+      // Fallback to request origin when env configuration is invalid.
+    }
+  }
+
+  return request.nextUrl.origin;
+}
+
 function buildWatchUrl(request: NextRequest, videoId: string, token: string): string {
-  const url = new URL(`/watch/${videoId}`, request.nextUrl.origin);
+  const url = new URL(`/watch/${videoId}`, resolveShareBaseUrl(request));
   url.searchParams.set('shareToken', token);
   return url.toString();
 }
@@ -44,6 +63,7 @@ function serializeShareLink(
     token: string;
     permission: string;
     allowGuests: boolean;
+    allowDownloads: boolean;
     expiresAt: Date | null;
     createdAt: Date;
     passwordHash: string | null;
@@ -59,6 +79,7 @@ function serializeShareLink(
       token: link.token,
       permission: link.permission,
       allowGuests: link.allowGuests,
+      allowDownloads: link.allowDownloads,
       expiresAt: link.expiresAt,
       createdAt: link.createdAt,
       hasPassword: !!link.passwordHash,
@@ -91,6 +112,7 @@ export async function GET(request: NextRequest, { params }: RouteParams) {
         token: true,
         permission: true,
         allowGuests: true,
+        allowDownloads: true,
         expiresAt: true,
         createdAt: true,
         passwordHash: true,
@@ -123,6 +145,7 @@ export async function POST(request: NextRequest, { params }: RouteParams) {
 
     const body = await request.json().catch(() => ({}));
     const allowGuests = typeof body?.allowGuests === 'boolean' ? body.allowGuests : true;
+    const allowDownloads = typeof body?.allowDownloads === 'boolean' ? body.allowDownloads : false;
     const password = typeof body?.password === 'string' ? body.password.trim() : '';
     if (password.length > MAX_SHARE_PASSWORD_LENGTH) {
       return apiErrors.badRequest(`Password must be ${MAX_SHARE_PASSWORD_LENGTH} characters or fewer`);
@@ -135,6 +158,7 @@ export async function POST(request: NextRequest, { params }: RouteParams) {
       token: string;
       permission: string;
       allowGuests: boolean;
+      allowDownloads: boolean;
       expiresAt: Date | null;
       createdAt: Date;
       passwordHash: string | null;
@@ -158,6 +182,7 @@ export async function POST(request: NextRequest, { params }: RouteParams) {
               data: {
                 token,
                 allowGuests,
+                allowDownloads,
                 passwordHash,
                 expiresAt: null,
               },
@@ -166,6 +191,7 @@ export async function POST(request: NextRequest, { params }: RouteParams) {
                 token: true,
                 permission: true,
                 allowGuests: true,
+                allowDownloads: true,
                 expiresAt: true,
                 createdAt: true,
                 passwordHash: true,
@@ -180,6 +206,7 @@ export async function POST(request: NextRequest, { params }: RouteParams) {
               videoId,
               permission: 'COMMENT',
               allowGuests,
+              allowDownloads,
               passwordHash,
             },
             select: {
@@ -187,6 +214,7 @@ export async function POST(request: NextRequest, { params }: RouteParams) {
               token: true,
               permission: true,
               allowGuests: true,
+              allowDownloads: true,
               expiresAt: true,
               createdAt: true,
               passwordHash: true,
@@ -232,6 +260,7 @@ export async function PATCH(request: NextRequest, { params }: RouteParams) {
 
     const body = await request.json().catch(() => ({}));
     const allowGuests = typeof body?.allowGuests === 'boolean' ? body.allowGuests : undefined;
+    const allowDownloads = typeof body?.allowDownloads === 'boolean' ? body.allowDownloads : undefined;
     const rawPassword = typeof body?.password === 'string' ? body.password : undefined;
     const clearPassword = body?.clearPassword === true;
     if (rawPassword !== undefined && rawPassword.length > MAX_SHARE_PASSWORD_LENGTH) {
@@ -266,6 +295,7 @@ export async function PATCH(request: NextRequest, { params }: RouteParams) {
       where: { id: existing.id },
       data: {
         ...(allowGuests !== undefined ? { allowGuests } : {}),
+        ...(allowDownloads !== undefined ? { allowDownloads } : {}),
         ...(passwordHashUpdate !== undefined ? { passwordHash: passwordHashUpdate } : {}),
         ...(shouldRotateToken ? { token: randomBytes(24).toString('base64url') } : {}),
       },
@@ -274,6 +304,7 @@ export async function PATCH(request: NextRequest, { params }: RouteParams) {
         token: true,
         permission: true,
         allowGuests: true,
+        allowDownloads: true,
         expiresAt: true,
         createdAt: true,
         passwordHash: true,

app/api/projects/route.ts

@@ -4,6 +4,7 @@ import { auth } from '@/lib/auth';
 import { ProjectVisibility } from '@prisma/client';
 import { rateLimit } from '@/lib/rate-limit';
 import { apiErrors, successResponse, withCacheControl } from '@/lib/api-response';
+import { DEFAULT_COMMENT_TAGS } from '@/lib/comment-tags';
 
 // GET /api/projects - List all projects for the authenticated user
 export async function GET(request: NextRequest) {
@@ -137,7 +138,8 @@ export async function POST(request: NextRequest) {
             return apiErrors.forbidden('Only workspace owners and admins can create projects');
         }
 
-        const project = await db.project.create({
+        const project = await db.$transaction(async (tx) => {
+            const createdProject = await tx.project.create({
                 data: {
                     name: name.trim(),
                     description: description?.trim() || null,
@@ -152,6 +154,17 @@ export async function POST(request: NextRequest) {
                 },
             });
 
+            await tx.commentTag.createMany({
+                data: DEFAULT_COMMENT_TAGS.map((tag) => ({
+                    ...tag,
+                    projectId: createdProject.id,
+                })),
+                skipDuplicates: true,
+            });
+
+            return createdProject;
+        });
+
         const response = successResponse(project, 201);
         return withCacheControl(response, 'private, no-store');
     } catch (error) {

app/api/upload/audio/[filename]/route.ts

@@ -1,7 +1,8 @@
 import { NextResponse } from 'next/server';
 import { r2Client, R2_BUCKET_NAME } from '@/lib/r2';
-import { GetObjectCommand, HeadObjectCommand } from '@aws-sdk/client-s3';
+import { DeleteObjectCommand, GetObjectCommand, HeadObjectCommand } from '@aws-sdk/client-s3';
 import { apiErrors } from '@/lib/api-response';
+import { db } from '@/lib/db';
 
 // Only allow UUID filenames with safe extensions
 const SAFE_FILENAME = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}\.[a-z0-9]+$/i;
@@ -15,6 +16,7 @@ const CONTENT_TYPE_MAP: Record<string, string> = {
   ogg: 'audio/ogg',
   wav: 'audio/wav',
 };
+const UNATTACHED_UPLOAD_TTL_MS = 15 * 60 * 1000;
 
 function getContentType(filename: string): string {
   const ext = filename.split('.').pop()?.toLowerCase() || '';
@@ -34,6 +36,7 @@ export async function GET(
     }
 
     const key = `voice/${filename}`;
+    const mediaUrl = `/api/upload/audio/${filename}`;
 
     // Get file metadata to determine content type
     const headResponse = await r2Client.send(
@@ -43,6 +46,23 @@ export async function GET(
       })
     );
 
+    const lastModified = headResponse.LastModified;
+    if (lastModified && Date.now() - lastModified.getTime() > UNATTACHED_UPLOAD_TTL_MS) {
+      const referenced = await db.comment.findFirst({
+        where: { voiceUrl: mediaUrl },
+        select: { id: true },
+      });
+      if (!referenced) {
+        await r2Client.send(
+          new DeleteObjectCommand({
+            Bucket: R2_BUCKET_NAME,
+            Key: key,
+          })
+        ).catch(() => undefined);
+        return apiErrors.notFound('File');
+      }
+    }
+
     // Use the stored content-type or infer from filename extension
     const contentType = headResponse.ContentType || getContentType(filename);
 
@@ -78,7 +98,7 @@ export async function GET(
       status: 200,
       headers: {
         'Content-Type': contentType,
-        'Cache-Control': 'public, max-age=31536000, immutable',
+        'Cache-Control': 'private, no-store',
         'Accept-Ranges': 'bytes',
       },
     });

app/api/upload/audio/route.ts

@@ -1,14 +1,23 @@
-import { auth } from '@/lib/auth';
+import { NextRequest } from 'next/server';
+import { auth, checkProjectAccess } from '@/lib/auth';
+import { db } from '@/lib/db';
 import { r2Client, R2_BUCKET_NAME } from '@/lib/r2';
 import { PutObjectCommand } from '@aws-sdk/client-s3';
 import { randomUUID } from 'crypto';
 import { rateLimit } from '@/lib/rate-limit';
+import { validateShareLinkAccess } from '@/lib/share-links';
+import { getShareSessionFromRequest } from '@/lib/share-session';
 import { apiErrors, successResponse, withCacheControl } from '@/lib/api-response';
+import {
+  deriveGuestUploadContext,
+  enforceGuestUploadQuota,
+  verifyGuestUploadToken,
+} from '@/lib/guest-upload-token';
 
 const MAX_FILE_SIZE = 10 * 1024 * 1024; // 10MB
 const ALLOWED_TYPES = ['audio/webm', 'audio/ogg', 'audio/mp4', 'audio/mpeg', 'audio/wav'];
 
-export async function POST(request: Request) {
+export async function POST(request: NextRequest) {
   try {
     // Check Content-Length header BEFORE loading the file
     const contentLength = request.headers.get('content-length');
@@ -23,18 +32,69 @@ export async function POST(request: Request) {
     const limited = await rateLimit(request, 'voice-upload');
     if (limited) return limited;
 
-    // Require authentication
     const session = await auth();
-    if (!session?.user?.id) {
-      return apiErrors.unauthorized();
-    }
 
     const formData = await request.formData();
     const file = formData.get('audio') as File | null;
+    const videoId = formData.get('videoId');
+    const uploadToken = formData.get('uploadToken');
 
     if (!file) {
       return apiErrors.badRequest('No audio file provided');
     }
+    if (typeof videoId !== 'string' || !videoId.trim()) {
+      return apiErrors.badRequest('videoId is required');
+    }
+
+    const safeVideoId = videoId.trim();
+    const video = await db.video.findUnique({
+      where: { id: safeVideoId },
+      include: { project: true },
+    });
+    if (!video) {
+      return apiErrors.notFound('Video');
+    }
+
+    const access = await checkProjectAccess(video.project, session?.user?.id);
+    const shareSession = getShareSessionFromRequest(request, safeVideoId);
+    const shareAccess = shareSession
+      ? await validateShareLinkAccess({
+        token: shareSession.token,
+        projectId: video.projectId,
+        videoId: safeVideoId,
+        requiredPermission: 'COMMENT',
+        passwordVerified: shareSession.passwordVerified,
+      })
+      : { hasAccess: false, canComment: false, canDownload: false, allowGuests: false, requiresPassword: false };
+    const canCommentWithMembership = !!session?.user?.id && access.hasAccess;
+    const canCommentWithShareLink = shareAccess.canComment && (session?.user?.id ? true : shareAccess.allowGuests);
+    if (!canCommentWithMembership && !canCommentWithShareLink) {
+      return apiErrors.forbidden('Access denied');
+    }
+
+    if (!session?.user?.id) {
+      if (typeof uploadToken !== 'string' || !uploadToken.trim()) {
+        return apiErrors.badRequest('uploadToken is required for guest uploads');
+      }
+
+      const expectedContext = deriveGuestUploadContext(request, shareSession?.token ?? null);
+      if (!expectedContext) {
+        return apiErrors.forbidden('Missing trusted client IP header');
+      }
+
+      const isValidUploadToken = verifyGuestUploadToken(uploadToken.trim(), {
+        projectId: video.projectId,
+        videoId: safeVideoId,
+        intent: 'audio',
+        context: expectedContext,
+      });
+      if (!isValidUploadToken) {
+        return apiErrors.forbidden('Invalid upload token');
+      }
+
+      const quotaError = await enforceGuestUploadQuota(request, safeVideoId, 'audio', shareSession?.token ?? null);
+      if (quotaError) return quotaError;
+    }
 
     // Double-check file size (defense in depth - Content-Length can be spoofed)
     if (file.size > MAX_FILE_SIZE) {

app/api/upload/image/[filename]/route.ts

@@ -1,7 +1,8 @@
 import { NextResponse } from 'next/server';
 import { r2Client, R2_BUCKET_NAME } from '@/lib/r2';
-import { GetObjectCommand, HeadObjectCommand } from '@aws-sdk/client-s3';
+import { DeleteObjectCommand, GetObjectCommand, HeadObjectCommand } from '@aws-sdk/client-s3';
 import { apiErrors } from '@/lib/api-response';
+import { db } from '@/lib/db';
 
 // Only allow UUID filenames with safe extensions
 const SAFE_FILENAME = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}\.[a-z0-9]+$/i;
@@ -14,6 +15,7 @@ const CONTENT_TYPE_MAP: Record<string, string> = {
     gif: 'image/gif',
     svg: 'image/svg+xml',
 };
+const UNATTACHED_UPLOAD_TTL_MS = 15 * 60 * 1000;
 
 function getContentType(filename: string): string {
     const ext = filename.split('.').pop()?.toLowerCase() || '';
@@ -33,6 +35,7 @@ export async function GET(
         }
 
         const key = `images/${filename}`;
+        const mediaUrl = `/api/upload/image/${filename}`;
 
         // Get file metadata to determine content type
         const headResponse = await r2Client.send(
@@ -42,6 +45,23 @@ export async function GET(
             })
         );
 
+        const lastModified = headResponse.LastModified;
+        if (lastModified && Date.now() - lastModified.getTime() > UNATTACHED_UPLOAD_TTL_MS) {
+            const referenced = await db.comment.findFirst({
+                where: { imageUrl: mediaUrl },
+                select: { id: true },
+            });
+            if (!referenced) {
+                await r2Client.send(
+                    new DeleteObjectCommand({
+                        Bucket: R2_BUCKET_NAME,
+                        Key: key,
+                    })
+                ).catch(() => undefined);
+                return apiErrors.notFound('File');
+            }
+        }
+
         const contentType = headResponse.ContentType || getContentType(filename);
 
         const objectResponse = await r2Client.send(
@@ -72,7 +92,7 @@ export async function GET(
             status: 200,
             headers: {
                 'Content-Type': contentType,
-                'Cache-Control': 'public, max-age=31536000, immutable',
+                'Cache-Control': 'private, no-store',
                 'Accept-Ranges': 'bytes',
             },
         });
@@ -85,4 +105,3 @@ export async function GET(
         return apiErrors.internalError('Failed to retrieve image');
     }
 }
-

app/api/upload/image/route.ts

@@ -1,9 +1,18 @@
-import { auth } from '@/lib/auth';
+import { NextRequest } from 'next/server';
+import { auth, checkProjectAccess } from '@/lib/auth';
+import { db } from '@/lib/db';
 import { r2Client, R2_BUCKET_NAME } from '@/lib/r2';
 import { PutObjectCommand } from '@aws-sdk/client-s3';
 import { randomUUID } from 'crypto';
 import { rateLimit } from '@/lib/rate-limit';
+import { validateShareLinkAccess } from '@/lib/share-links';
+import { getShareSessionFromRequest } from '@/lib/share-session';
 import { apiErrors, successResponse, withCacheControl } from '@/lib/api-response';
+import {
+    deriveGuestUploadContext,
+    enforceGuestUploadQuota,
+    verifyGuestUploadToken,
+} from '@/lib/guest-upload-token';
 
 const MAX_FILE_SIZE = 10 * 1024 * 1024; // 10MB
 const ALLOWED_TYPES = [
@@ -11,10 +20,9 @@ const ALLOWED_TYPES = [
     'image/png',
     'image/webp',
     'image/gif',
-    'image/svg+xml'
 ];
 
-export async function POST(request: Request) {
+export async function POST(request: NextRequest) {
     try {
         // Check Content-Length header BEFORE loading the file
         const contentLength = request.headers.get('content-length');
@@ -29,18 +37,69 @@ export async function POST(request: Request) {
         const limited = await rateLimit(request, 'image-upload');
         if (limited) return limited;
 
-        // Require authentication
         const session = await auth();
-        if (!session?.user?.id) {
-            return apiErrors.unauthorized();
-        }
 
         const formData = await request.formData();
         const file = formData.get('image') as File | null;
+        const videoId = formData.get('videoId');
+        const uploadToken = formData.get('uploadToken');
 
         if (!file) {
             return apiErrors.badRequest('No image file provided');
         }
+        if (typeof videoId !== 'string' || !videoId.trim()) {
+            return apiErrors.badRequest('videoId is required');
+        }
+
+        const safeVideoId = videoId.trim();
+        const video = await db.video.findUnique({
+            where: { id: safeVideoId },
+            include: { project: true },
+        });
+        if (!video) {
+            return apiErrors.notFound('Video');
+        }
+
+        const access = await checkProjectAccess(video.project, session?.user?.id);
+        const shareSession = getShareSessionFromRequest(request, safeVideoId);
+        const shareAccess = shareSession
+            ? await validateShareLinkAccess({
+                token: shareSession.token,
+                projectId: video.projectId,
+                videoId: safeVideoId,
+                requiredPermission: 'COMMENT',
+                passwordVerified: shareSession.passwordVerified,
+            })
+            : { hasAccess: false, canComment: false, canDownload: false, allowGuests: false, requiresPassword: false };
+        const canCommentWithMembership = !!session?.user?.id && access.hasAccess;
+        const canCommentWithShareLink = shareAccess.canComment && (session?.user?.id ? true : shareAccess.allowGuests);
+        if (!canCommentWithMembership && !canCommentWithShareLink) {
+            return apiErrors.forbidden('Access denied');
+        }
+
+        if (!session?.user?.id) {
+            if (typeof uploadToken !== 'string' || !uploadToken.trim()) {
+                return apiErrors.badRequest('uploadToken is required for guest uploads');
+            }
+
+            const expectedContext = deriveGuestUploadContext(request, shareSession?.token ?? null);
+            if (!expectedContext) {
+                return apiErrors.forbidden('Missing trusted client IP header');
+            }
+
+            const isValidUploadToken = verifyGuestUploadToken(uploadToken.trim(), {
+                projectId: video.projectId,
+                videoId: safeVideoId,
+                intent: 'image',
+                context: expectedContext,
+            });
+            if (!isValidUploadToken) {
+                return apiErrors.forbidden('Invalid upload token');
+            }
+
+            const quotaError = await enforceGuestUploadQuota(request, safeVideoId, 'image', shareSession?.token ?? null);
+            if (quotaError) return quotaError;
+        }
 
         // Double-check file size (defense in depth - Content-Length can be spoofed)
         if (file.size > MAX_FILE_SIZE) {
@@ -54,7 +113,7 @@ export async function POST(request: Request) {
         }
 
         // Generate unique filename
-        const ext = contentType.split('/')[1] === 'svg+xml' ? 'svg' : contentType.split('/')[1] || 'jpeg';
+        const ext = contentType.split('/')[1] || 'jpeg';
         const filename = `${randomUUID()}.${ext}`;
         const key = `images/${filename}`;
 

app/api/versions/[versionId]/comments/route.ts

@@ -6,10 +6,35 @@ import { notifyProjectOwner } from '@/lib/notifications';
 import { apiErrors, successResponse, withCacheControl } from '@/lib/api-response';
 import { validateShareLinkAccess } from '@/lib/share-links';
 import { getShareSessionFromRequest } from '@/lib/share-session';
+import { HeadObjectCommand } from '@aws-sdk/client-s3';
+import { r2Client, R2_BUCKET_NAME } from '@/lib/r2';
+import { ensureGuestIdentityFromRequest, getGuestIdentityFromRequest, setGuestIdentityCookie } from '@/lib/guest-identity';
 
 type RouteParams = { params: Promise<{ versionId: string }> };
 const SAFE_IMAGE_PATH = /^\/api\/upload\/image\/[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}\.[a-z0-9]+$/i;
 const SAFE_AUDIO_PATH = /^\/api\/upload\/audio\/[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}\.[a-z0-9]+$/i;
+const UNATTACHED_UPLOAD_TTL_MS = 15 * 60 * 1000;
+
+async function isFreshAttachment(url: string, kind: 'audio' | 'image'): Promise<boolean> {
+    const prefix = kind === 'audio' ? '/api/upload/audio/' : '/api/upload/image/';
+    if (!url.startsWith(prefix)) return false;
+
+    const filename = url.slice(prefix.length);
+    const key = kind === 'audio' ? `voice/${filename}` : `images/${filename}`;
+
+    try {
+        const head = await r2Client.send(
+            new HeadObjectCommand({
+                Bucket: R2_BUCKET_NAME,
+                Key: key,
+            })
+        );
+        if (!head.LastModified) return false;
+        return Date.now() - head.LastModified.getTime() <= UNATTACHED_UPLOAD_TTL_MS;
+    } catch {
+        return false;
+    }
+}
 
 // GET /api/versions/[versionId]/comments
 export async function GET(request: NextRequest, { params }: RouteParams) {
@@ -200,7 +225,7 @@ export async function POST(request: NextRequest, { params }: RouteParams) {
                 requiredPermission: 'COMMENT',
                 passwordVerified: shareSession.passwordVerified,
             })
-            : { hasAccess: false, canComment: false, allowGuests: false, requiresPassword: false };
+            : { hasAccess: false, canComment: false, canDownload: false, allowGuests: false, requiresPassword: false };
 
         // Check if user can comment
         const canComment = isOwner || isMember || isPublic || isWorkspaceMember || shareAccess.canComment;
@@ -247,10 +272,18 @@ export async function POST(request: NextRequest, { params }: RouteParams) {
         if (voiceUrl && !SAFE_AUDIO_PATH.test(voiceUrl)) {
             return apiErrors.badRequest('Voice URL must reference an uploaded audio file');
         }
+        if (voiceUrl && !(await isFreshAttachment(voiceUrl, 'audio'))) {
+            return apiErrors.badRequest('Voice upload expired. Please upload again.');
+        }
 
         if (imageUrl && !SAFE_IMAGE_PATH.test(imageUrl)) {
             return apiErrors.badRequest('Image URL must reference an uploaded image file');
         }
+        if (imageUrl && !(await isFreshAttachment(imageUrl, 'image'))) {
+            return apiErrors.badRequest('Image upload expired. Please upload again.');
+        }
+
+        const guestIdentity = isGuest ? ensureGuestIdentityFromRequest(request) : null;
 
         const comment = await db.comment.create({
             data: {
@@ -265,6 +298,7 @@ export async function POST(request: NextRequest, { params }: RouteParams) {
                 authorId: session?.user?.id || null,
                 guestName: isGuest ? guestName : null,
                 guestEmail: isGuest ? guestEmail : null,
+                guestIdentityId: isGuest ? guestIdentity?.identityId ?? null : null,
                 tagId: tagId || null,
                 versionId,
             },
@@ -319,7 +353,25 @@ export async function POST(request: NextRequest, { params }: RouteParams) {
             }
         }
 
-        const response = successResponse(comment, 201);
+        const viewerUserId = session?.user?.id ?? null;
+        const viewerGuestIdentityId = viewerUserId
+            ? null
+            : guestIdentity?.identityId ?? getGuestIdentityFromRequest(request);
+        const canEditComment = viewerUserId
+            ? comment.authorId === viewerUserId
+            : !!viewerGuestIdentityId
+            && !!comment.guestIdentityId
+            && comment.guestIdentityId === viewerGuestIdentityId;
+        const { guestIdentityId: _guestIdentityId, ...commentData } = comment;
+
+        const response = successResponse({
+            ...commentData,
+            canEdit: canEditComment,
+            canDelete: canEditComment || viewerUserId === project.ownerId,
+        }, 201);
+        if (isGuest && guestIdentity?.shouldSetCookie) {
+            setGuestIdentityCookie(response, guestIdentity.identityId);
+        }
         return withCacheControl(response, 'private, no-store');
     } catch (error) {
         console.error('Error creating comment:', error);

app/api/versions/[versionId]/download/route.ts

@@ -2,6 +2,9 @@ import { db } from '@/lib/db';
 import { auth, checkProjectAccess } from '@/lib/auth';
 import { apiErrors, successResponse, withCacheControl } from '@/lib/api-response';
 import { rateLimit } from '@/lib/rate-limit';
+import { validateShareLinkAccess } from '@/lib/share-links';
+import { getShareSessionFromRequest } from '@/lib/share-session';
+import { NextRequest } from 'next/server';
 import { DownloadEgressSource } from '@prisma/client';
 
 type RouteParams = { params: Promise<{ versionId: string }> };
@@ -319,7 +322,7 @@ function parseEstimatedBytes(contentLengthHeader: string | null): bigint {
 }
 
 // GET /api/versions/[versionId]/download
-export async function GET(request: Request, { params }: RouteParams) {
+export async function GET(request: NextRequest, { params }: RouteParams) {
   try {
     const { searchParams } = new URL(request.url);
     const isPrepareOnly = searchParams.get('prepare') === '1';
@@ -362,7 +365,18 @@ export async function GET(request: Request, { params }: RouteParams) {
     }
 
     const access = await checkProjectAccess(version.video.project, session?.user?.id);
-    if (!access.hasAccess) {
+    const shareSession = getShareSessionFromRequest(request, version.video.id);
+    const shareAccess = shareSession
+      ? await validateShareLinkAccess({
+        token: shareSession.token,
+        projectId: version.video.projectId,
+        videoId: version.video.id,
+        requiredPermission: 'VIEW',
+        passwordVerified: shareSession.passwordVerified,
+      })
+      : { hasAccess: false, canComment: false, canDownload: false, allowGuests: false, requiresPassword: false };
+    const canDownloadViaShareLink = shareAccess.hasAccess && shareAccess.canDownload;
+    if (!access.hasAccess && !canDownloadViaShareLink) {
       return apiErrors.forbidden('Access denied');
     }
 

app/api/watch/[videoId]/route.ts

@@ -5,6 +5,7 @@ import { apiErrors, successResponse, withCacheControl } from '@/lib/api-response
 import { rateLimit } from '@/lib/rate-limit';
 import { validateShareLinkAccess } from '@/lib/share-links';
 import { getShareSessionFromRequest } from '@/lib/share-session';
+import { getGuestIdentityFromRequest } from '@/lib/guest-identity';
 
 type RouteParams = { params: Promise<{ videoId: string }> };
 
@@ -48,6 +49,7 @@ export async function GET(request: NextRequest, { params }: RouteParams) {
                                     annotationData: true,
                                     parentId: true,
                                     authorId: true,
+                                    guestIdentityId: true,
                                     tagId: true,
                                     versionId: true,
                                     guestName: true,
@@ -70,6 +72,7 @@ export async function GET(request: NextRequest, { params }: RouteParams) {
                                             annotationData: true,
                                             parentId: true,
                                             authorId: true,
+                                            guestIdentityId: true,
                                             tagId: true,
                                             versionId: true,
                                             guestName: true,
@@ -109,7 +112,7 @@ export async function GET(request: NextRequest, { params }: RouteParams) {
                 requiredPermission: 'VIEW',
                 passwordVerified: shareSession.passwordVerified,
             })
-            : { hasAccess: false, canComment: false, allowGuests: false, requiresPassword: false };
+            : { hasAccess: false, canComment: false, canDownload: false, allowGuests: false, requiresPassword: false };
 
         if (!access.hasAccess && !shareAccess.hasAccess) {
             return apiErrors.forbidden('Access denied');
@@ -117,10 +120,65 @@ export async function GET(request: NextRequest, { params }: RouteParams) {
 
         // Include auth context so the client knows if the viewer is a guest
         const { project, ...videoData } = video;
+        const viewerUserId = session?.user?.id ?? null;
+        const viewerGuestIdentityId = viewerUserId ? null : getGuestIdentityFromRequest(request);
+        const isProjectOwner = viewerUserId === project.ownerId;
+
+        const versions = videoData.versions.map((version) => {
+            if (!('comments' in version)) {
+                return version;
+            }
+
+            return {
+                ...version,
+                comments: version.comments.map((comment) => {
+                    const canEditComment = viewerUserId
+                        ? comment.authorId === viewerUserId
+                        : !!viewerGuestIdentityId
+                        && !!comment.guestIdentityId
+                        && comment.guestIdentityId === viewerGuestIdentityId;
+                    const canDeleteComment = canEditComment || isProjectOwner;
+                    const {
+                        authorId: _commentAuthorId,
+                        guestIdentityId: _commentGuestIdentityId,
+                        replies,
+                        ...commentData
+                    } = comment;
+
+                    return {
+                        ...commentData,
+                        canEdit: canEditComment,
+                        canDelete: canDeleteComment,
+                        replies: replies.map((reply) => {
+                            const canEditReply = viewerUserId
+                                ? reply.authorId === viewerUserId
+                                : !!viewerGuestIdentityId
+                                && !!reply.guestIdentityId
+                                && reply.guestIdentityId === viewerGuestIdentityId;
+                            const canDeleteReply = canEditReply || isProjectOwner;
+                            const {
+                                authorId: _replyAuthorId,
+                                guestIdentityId: _replyGuestIdentityId,
+                                ...replyData
+                            } = reply;
+                            return {
+                                ...replyData,
+                                canEdit: canEditReply,
+                                canDelete: canDeleteReply,
+                            };
+                        }),
+                    };
+                }),
+            };
+        });
+
         const canCommentWithMembership = access.hasAccess;
         const canCommentWithShareLink = shareAccess.canComment && (session?.user?.id ? true : shareAccess.allowGuests);
+        const canDownloadWithMembership = access.hasAccess;
+        const canDownloadWithShareLink = shareAccess.hasAccess && shareAccess.canDownload;
         const response = successResponse({
             ...videoData,
+            versions,
             projectId: video.projectId,
             project: {
                 name: project.name,
@@ -131,6 +189,8 @@ export async function GET(request: NextRequest, { params }: RouteParams) {
             currentUserId: session?.user?.id || null,
             currentUserName: session?.user?.name || null,
             canComment: canCommentWithMembership || canCommentWithShareLink,
+            canDownload: canDownloadWithMembership || canDownloadWithShareLink,
+            canManageTags: access.canEdit,
         });
 
         return withCacheControl(response, 'private, no-cache');

app/api/watch/[videoId]/upload-token/route.ts

@@ -0,0 +1,101 @@
+import { NextRequest } from 'next/server';
+import { auth, checkProjectAccess } from '@/lib/auth';
+import { db } from '@/lib/db';
+import { rateLimit } from '@/lib/rate-limit';
+import { validateShareLinkAccess } from '@/lib/share-links';
+import { getShareSessionFromRequest } from '@/lib/share-session';
+import { apiErrors, successResponse, withCacheControl } from '@/lib/api-response';
+import {
+  createGuestUploadToken,
+  deriveGuestUploadContext,
+  guestUploadTokenTtlSeconds,
+  type GuestUploadIntent,
+} from '@/lib/guest-upload-token';
+
+type RouteParams = { params: Promise<{ videoId: string }> };
+
+function validateSameOriginRequest(request: NextRequest): Response | null {
+  const origin = request.headers.get('origin');
+  if (!origin) {
+    return apiErrors.forbidden('Missing Origin header');
+  }
+
+  if (origin !== request.nextUrl.origin) {
+    return apiErrors.forbidden('Cross-origin requests are not allowed');
+  }
+
+  return null;
+}
+
+export async function POST(request: NextRequest, { params }: RouteParams) {
+  try {
+    const originError = validateSameOriginRequest(request);
+    if (originError) return originError;
+
+    const limited = await rateLimit(request, 'guest-upload-token', {
+      windowMs: 60 * 1000,
+      maxRequests: 20,
+    });
+    if (limited) return limited;
+
+    const session = await auth();
+    if (session?.user?.id) {
+      return apiErrors.badRequest('Upload token is only required for guest uploads');
+    }
+
+    const { videoId } = await params;
+    const body = await request.json().catch(() => ({}));
+    const intent = body?.intent;
+    if (intent !== 'audio' && intent !== 'image') {
+      return apiErrors.badRequest('intent must be "audio" or "image"');
+    }
+
+    const video = await db.video.findUnique({
+      where: { id: videoId },
+      include: { project: true },
+    });
+    if (!video) {
+      return apiErrors.notFound('Video');
+    }
+
+    const access = await checkProjectAccess(video.project, session?.user?.id);
+    const shareSession = getShareSessionFromRequest(request, video.id);
+    const shareAccess = shareSession
+      ? await validateShareLinkAccess({
+        token: shareSession.token,
+        projectId: video.projectId,
+        videoId: video.id,
+        requiredPermission: 'COMMENT',
+        passwordVerified: shareSession.passwordVerified,
+      })
+      : { hasAccess: false, canComment: false, canDownload: false, allowGuests: false, requiresPassword: false };
+
+    const canCommentWithMembership = !!session?.user?.id && access.hasAccess;
+    const canCommentWithShareLink = shareAccess.canComment && shareAccess.allowGuests;
+    if (!canCommentWithMembership && !canCommentWithShareLink) {
+      return apiErrors.forbidden('Access denied');
+    }
+
+    const context = deriveGuestUploadContext(request, shareSession?.token ?? null);
+    if (!context) {
+      return apiErrors.forbidden('Missing trusted client IP header');
+    }
+
+    const token = createGuestUploadToken({
+      projectId: video.projectId,
+      videoId: video.id,
+      intent: intent as GuestUploadIntent,
+      context,
+    });
+
+    const response = successResponse({
+      token,
+      intent,
+      expiresInSeconds: guestUploadTokenTtlSeconds,
+    });
+    return withCacheControl(response, 'private, no-store');
+  } catch (error) {
+    console.error('Error issuing guest upload token:', error);
+    return apiErrors.internalError('Failed to issue upload token');
+  }
+}

components/video-page-content.tsx

@@ -130,6 +130,8 @@ interface Comment {
   createdAt: string;
   author: { id: string; name: string | null; image: string | null } | null;
   guestName: string | null;
+  canEdit?: boolean;
+  canDelete?: boolean;
   tag: CommentTag | null;
   replies: {
     id: string;
@@ -141,6 +143,8 @@ interface Comment {
     createdAt: string;
     author: { id: string; name: string | null; image: string | null } | null;
     guestName: string | null;
+    canEdit?: boolean;
+    canDelete?: boolean;
     tag: CommentTag | null;
   }[];
 }
@@ -161,6 +165,8 @@ interface VideoData {
   currentUserId: string | null;
   currentUserName: string | null;
   canComment?: boolean;
+  canDownload?: boolean;
+  canManageTags?: boolean;
 }
 
 function formatTime(seconds: number): string {
@@ -388,6 +394,7 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
 
   const isGuest = video ? !video.isAuthenticated : false;
   const canInitializePlayer = mode !== 'watch' || !isGuest || guestNameConfirmed;
+  const normalizedGuestName = guestName.trim();
 
   const [showVersionDialog, setShowVersionDialog] = useState(false);
   const [newVersionUrl, setNewVersionUrl] = useState('');
@@ -549,14 +556,18 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
   const isDownloadingVideo = activeDownloadTarget !== null;
 
   const isVideoDownloadAvailable = useMemo(() => {
-    if (!activeVersion) return false;
+    if (!activeVersion || !video?.canDownload) return false;
     if (activeVersion.providerId === 'bunny') return true;
     if (activeVersion.providerId !== 'direct') return false;
     return !!getSafeDirectDownloadUrl(activeVersion.originalUrl);
-  }, [activeVersion]);
+  }, [activeVersion, video?.canDownload]);
 
   const handleDownloadVideo = useCallback(async (preference: BunnyDownloadPreference = 'compressed') => {
     if (!activeVersion || !video || isDownloadingVideo) return;
+    if (!video.canDownload) {
+      toast.error('Download is disabled for this shared link');
+      return;
+    }
     if (activeVersion.providerId !== 'bunny' && activeVersion.providerId !== 'direct') {
       toast.error('This video source does not support direct download');
       return;
@@ -619,6 +630,24 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
     }
   }, [activeVersion, isDownloadingVideo, video]);
 
+  const getGuestUploadToken = useCallback(async (intent: 'audio' | 'image') => {
+    if (!isGuest) return null;
+
+    const response = await fetch(`/api/watch/${videoId}/upload-token`, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ intent }),
+    });
+    const payload = (await response.json().catch(() => null)) as
+      | { data?: { token?: string }; error?: string }
+      | null;
+    const token = payload?.data?.token;
+    if (!response.ok || !token) {
+      throw new Error(payload?.error || 'Failed to prepare upload');
+    }
+    return token;
+  }, [isGuest, videoId]);
+
   // Memoize comments array
   const comments = useMemo(() => {
     return activeVersion?.comments || [];
@@ -671,7 +700,8 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
     if (!projectId) return;
     async function fetchTags() {
       try {
-        const res = await fetch(`/api/projects/${projectId}/tags`);
+        const query = videoId ? `?videoId=${encodeURIComponent(videoId)}` : '';
+        const res = await fetch(`/api/projects/${projectId}/tags${query}`);
         if (res.ok) {
           const data = await res.json();
           const tags = data.data || [];
@@ -684,7 +714,7 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
       }
     }
     fetchTags();
-  }, [projectId, selectedTagId]);
+  }, [projectId, selectedTagId, videoId]);
 
   // Load YouTube API immediately on component mount (async, non-blocking)
   useEffect(() => {
@@ -1542,7 +1572,9 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
       isResolved: false,
       createdAt: new Date().toISOString(),
       author: isGuest ? null : { id: 'current-user', name: currentUserName, image: null },
-      guestName: isGuest ? guestName : null,
+      guestName: isGuest ? normalizedGuestName : null,
+      canEdit: true,
+      canDelete: true,
       tag: availableTags.find(t => t.id === selectedTagId) || null,
       replies: [],
     };
@@ -1578,6 +1610,9 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
         setIsUploadingImage(true);
         const imageFormData = new FormData();
         imageFormData.append('image', imageBlob);
+        imageFormData.append('videoId', videoId);
+        const uploadToken = await getGuestUploadToken('image');
+        if (uploadToken) imageFormData.append('uploadToken', uploadToken);
 
         const imageRes = await fetch('/api/upload/image', {
           method: 'POST',
@@ -1597,7 +1632,7 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
           timestamp: selectedTimestamp ?? currentTime,
           ...(voiceData && { voiceUrl: voiceData.url, voiceDuration: voiceData.duration }),
           ...(imageData && { imageUrl: imageData.url }),
-          ...(isGuest && guestName && { guestName }),
+          ...(isGuest && normalizedGuestName && { guestName: normalizedGuestName }),
           ...(selectedTagId && { tagId: selectedTagId }),
           ...(serializedAnnotation && { annotationData: serializedAnnotation }),
         }),
@@ -1649,7 +1684,7 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
       setIsUploadingImage(false);
       isMutatingRef.current = false;
     }
-  }, [commentText, currentTime, selectedTimestamp, activeVersion, activeVersionId, isGuest, guestName, currentUserName, selectedTagId, availableTags, imageBlob, annotationStrokes, isAnnotating]);
+  }, [commentText, currentTime, selectedTimestamp, activeVersion, activeVersionId, isGuest, normalizedGuestName, currentUserName, selectedTagId, availableTags, imageBlob, annotationStrokes, isAnnotating, videoId, getGuestUploadToken]);
 
   const handleImageSelect = useCallback((e: React.ChangeEvent<HTMLInputElement>, isReply: boolean = false) => {
     const file = e.target.files?.[0];
@@ -1758,6 +1793,9 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
     try {
       const formData = new FormData();
       formData.append('audio', audioBlob, 'recording.webm');
+      formData.append('videoId', videoId);
+      const uploadToken = await getGuestUploadToken('audio');
+      if (uploadToken) formData.append('uploadToken', uploadToken);
 
       const uploadRes = await fetch('/api/upload/audio', {
         method: 'POST',
@@ -1779,7 +1817,7 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
     } finally {
       setIsUploadingAudio(false);
     }
-  }, [audioBlob, activeVersion, recordingTime, handleAddComment]);
+  }, [audioBlob, activeVersion, recordingTime, handleAddComment, videoId, getGuestUploadToken]);
 
   const stopVoiceTracking = useCallback(() => {
     if (voiceRafRef.current) {
@@ -1895,6 +1933,9 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
       if (audioBlob) {
         const formData = new FormData();
         formData.append('audio', audioBlob, 'recording.webm');
+        formData.append('videoId', videoId);
+        const uploadToken = await getGuestUploadToken('audio');
+        if (uploadToken) formData.append('uploadToken', uploadToken);
         const uploadRes = await fetch('/api/upload/audio', { method: 'POST', body: formData });
         if (!uploadRes.ok) throw new Error('Failed to upload audio');
         const uploadData = await uploadRes.json();
@@ -1914,7 +1955,7 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
       setIsUploadingAudio(false);
       setIsUploadingImage(false);
     }
-  }, [audioBlob, imageBlob, activeVersion, recordingTime, commentText, submitVoiceComment, handleAddComment]);
+  }, [audioBlob, imageBlob, activeVersion, recordingTime, commentText, submitVoiceComment, handleAddComment, videoId, getGuestUploadToken]);
 
   const handleResolveComment = useCallback(
     async (commentId: string, currentlyResolved: boolean) => {
@@ -2002,7 +2043,9 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
       annotationData: null,
       createdAt: new Date().toISOString(),
       author: isGuest ? null : { id: 'current-user', name: currentUserName, image: null },
-      guestName: isGuest ? guestName : null,
+      guestName: isGuest ? normalizedGuestName : null,
+      canEdit: true,
+      canDelete: true,
       tag: null,
     };
 
@@ -2041,6 +2084,9 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
         setIsUploadingReplyImage(true);
         const imageFormData = new FormData();
         imageFormData.append('image', replyImageBlob);
+        imageFormData.append('videoId', videoId);
+        const uploadToken = await getGuestUploadToken('image');
+        if (uploadToken) imageFormData.append('uploadToken', uploadToken);
 
         const imageRes = await fetch('/api/upload/image', {
           method: 'POST',
@@ -2061,7 +2107,7 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
           parentId,
           ...(voiceData && { voiceUrl: voiceData.url, voiceDuration: voiceData.duration }),
           ...(submittedImageData && { imageUrl: submittedImageData.url }),
-          ...(isGuest && guestName && { guestName }),
+          ...(isGuest && normalizedGuestName && { guestName: normalizedGuestName }),
         }),
       });
 
@@ -2132,7 +2178,7 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
       setIsUploadingReplyImage(false);
       isMutatingRef.current = false;
     }
-  }, [replyText, activeVersion, activeVersionId, comments, currentTime, isGuest, guestName, currentUserName, replyImageBlob]);
+  }, [replyText, activeVersion, activeVersionId, comments, currentTime, isGuest, normalizedGuestName, currentUserName, replyImageBlob, videoId, getGuestUploadToken]);
 
   const startReplyRecording = useCallback(async () => {
     try {
@@ -2189,6 +2235,9 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
     try {
       const formData = new FormData();
       formData.append('audio', replyAudioBlob, 'recording.webm');
+      formData.append('videoId', videoId);
+      const uploadToken = await getGuestUploadToken('audio');
+      if (uploadToken) formData.append('uploadToken', uploadToken);
       const uploadRes = await fetch('/api/upload/audio', { method: 'POST', body: formData });
       if (!uploadRes.ok) throw new Error('Failed to upload audio');
       const uploadData = await uploadRes.json();
@@ -2199,7 +2248,7 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
     } finally {
       setIsUploadingReplyAudio(false);
     }
-  }, [replyAudioBlob, activeVersion, replyRecordingTime, handleReplyComment]);
+  }, [replyAudioBlob, activeVersion, replyRecordingTime, handleReplyComment, videoId, getGuestUploadToken]);
 
   const submitReplyWithMedia = useCallback(async (parentId: string) => {
     if (!activeVersion) return;
@@ -2218,6 +2267,9 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
       if (replyAudioBlob) {
         const formData = new FormData();
         formData.append('audio', replyAudioBlob, 'recording.webm');
+        formData.append('videoId', videoId);
+        const uploadToken = await getGuestUploadToken('audio');
+        if (uploadToken) formData.append('uploadToken', uploadToken);
         const uploadRes = await fetch('/api/upload/audio', { method: 'POST', body: formData });
         if (!uploadRes.ok) throw new Error('Failed to upload audio reply');
         const uploadData = await uploadRes.json();
@@ -2237,7 +2289,7 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
       setIsUploadingReplyAudio(false);
       setIsUploadingReplyImage(false);
     }
-  }, [replyAudioBlob, replyImageBlob, activeVersion, replyRecordingTime, replyText, submitVoiceReply, handleReplyComment]);
+  }, [replyAudioBlob, replyImageBlob, activeVersion, replyRecordingTime, replyText, submitVoiceReply, handleReplyComment, videoId, getGuestUploadToken]);
 
   const handleEditComment = useCallback(async (commentId: string) => {
     if (!editText.trim() && !editAnnotationData) return;
@@ -2257,6 +2309,7 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
       const body: Record<string, unknown> = { content: editText };
       if (editTagId !== undefined) body.tagId = editTagId;
       if (finalAnnotationData !== undefined) body.annotationData = finalAnnotationData;
+      if (isGuest && normalizedGuestName) body.guestName = normalizedGuestName;
       const res = await fetch(`/api/comments/${commentId}`, {
         method: 'PATCH',
         headers: { 'Content-Type': 'application/json' },
@@ -2306,7 +2359,7 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
       setIsSubmittingEdit(false);
       isMutatingRef.current = false;
     }
-  }, [editText, editTagId, editAnnotationData, isEditingAnnotation, activeVersionId, availableTags]);
+  }, [editText, editTagId, editAnnotationData, isEditingAnnotation, activeVersionId, availableTags, isGuest, normalizedGuestName]);
 
   const handleDeleteComment = useCallback(async (commentId: string) => {
     setDeletingCommentId(commentId);
@@ -3520,6 +3573,9 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
                   comment.author?.name || comment.guestName || 'Anonymous';
                 const isEditing = editingCommentId === comment.id;
                 const isReplying = replyingTo === comment.id;
+                const canEditComment = comment.canEdit ?? (comment.author?.id === currentUserId);
+                const canDeleteComment = comment.canDelete ?? (comment.author?.id === currentUserId || video.project.ownerId === currentUserId);
+                const canManageComment = canEditComment || canDeleteComment;
                 return (
                   <div
                     key={comment.id}
@@ -3563,7 +3619,7 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
                             <Circle className="h-4 w-4" />
                           )}
                         </Button>
-                        {(comment.author?.id === currentUserId || video.project.ownerId === currentUserId) && (
+                        {canManageComment && (
                           <DropdownMenu>
                             <DropdownMenuTrigger asChild>
                               <Button
@@ -3582,7 +3638,7 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
                                 <Reply className="h-4 w-4 mr-2" />
                                 Reply
                               </DropdownMenuItem>
-                              {comment.author?.id === currentUserId && (
+                              {canEditComment && (
                                 <DropdownMenuItem onClick={() => {
                                   setEditingCommentId(comment.id);
                                   setEditText(comment.content || '');
@@ -3592,6 +3648,7 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
                                   Edit
                                 </DropdownMenuItem>
                               )}
+                              {canDeleteComment && (
                                 <DropdownMenuItem
                                   className="text-destructive"
                                   onClick={() => handleDeleteComment(comment.id)}
@@ -3599,6 +3656,7 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
                                   <Trash2 className="h-4 w-4 mr-2" />
                                   Delete
                                 </DropdownMenuItem>
+                              )}
                             </DropdownMenuContent>
                           </DropdownMenu>
                         )}
@@ -3774,6 +3832,9 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
                           const replyAuthor =
                             reply.author?.name || reply.guestName || 'Anonymous';
                           const isEditingReply = editingCommentId === reply.id;
+                          const canEditReply = reply.canEdit ?? (reply.author?.id === currentUserId);
+                          const canDeleteReply = reply.canDelete ?? (reply.author?.id === currentUserId || video.project.ownerId === currentUserId);
+                          const canManageReply = canEditReply || canDeleteReply;
                           return (
                             <div key={reply.id} className="group/reply text-sm">
                               <div className="flex items-center justify-between gap-2 mb-1">
@@ -3788,7 +3849,7 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
                                     {new Date(reply.createdAt).toLocaleDateString()}
                                   </span>
                                 </div>
-                                {(reply.author?.id === currentUserId || video.project.ownerId === currentUserId) && (
+                                {canManageReply && (
                                   <DropdownMenu>
                                     <DropdownMenuTrigger asChild>
                                       <Button
@@ -3800,7 +3861,7 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
                                       </Button>
                                     </DropdownMenuTrigger>
                                     <DropdownMenuContent align="end">
-                                      {reply.author?.id === currentUserId && (
+                                      {canEditReply && (
                                         <DropdownMenuItem onClick={() => {
                                           setEditingCommentId(reply.id);
                                           setEditText(reply.content || '');
@@ -3809,6 +3870,7 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
                                           Edit
                                         </DropdownMenuItem>
                                       )}
+                                      {canDeleteReply && (
                                         <DropdownMenuItem
                                           className="text-destructive"
                                           onClick={() => handleDeleteComment(reply.id)}
@@ -3816,6 +3878,7 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
                                           <Trash2 className="h-4 w-4 mr-2" />
                                           Delete
                                         </DropdownMenuItem>
+                                      )}
                                     </DropdownMenuContent>
                                   </DropdownMenu>
                                 )}
@@ -4345,6 +4408,8 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
                               {selectedTagId === tag.id && <span className="ml-auto">✓</span>}
                             </DropdownMenuItem>
                           ))}
+                          {video.canManageTags && (
+                            <>
                               <DropdownMenuSeparator />
                               <DropdownMenuItem asChild>
                                 <Link href={`/projects/${projectId}/settings#comment-tags`} className="gap-2 text-muted-foreground">
@@ -4352,6 +4417,8 @@ export function VideoPageContent({ mode, videoId, projectId: propProjectId }: Vi
                                   Manage Tags
                                 </Link>
                               </DropdownMenuItem>
+                            </>
+                          )}
                         </DropdownMenuContent>
                       </DropdownMenu>
                     )}

lib/admin-stats.ts

@@ -202,35 +202,63 @@ export const getCachedUserMediaStorage = unstable_cache(
         const userStorage: Record<string, { total: number, voice: number, image: number }> = {};
         try {
             const fileSizes = await listAllR2FileSizes();
+            const seenKeys = new Set<string>();
 
             const mediaComments = await db.comment.findMany({
-                where: { OR: [{ voiceUrl: { not: null } }, { imageUrl: { not: null } }], authorId: { not: null } },
+                where: { OR: [{ voiceUrl: { not: null } }, { imageUrl: { not: null } }] },
-                select: { authorId: true, voiceUrl: true, imageUrl: true }
+                select: {
+                    voiceUrl: true,
+                    imageUrl: true,
+                    version: {
+                        select: {
+                            video: {
+                                select: {
+                                    project: {
+                                        select: {
+                                            workspace: {
+                                                select: { ownerId: true },
+                                            },
+                                        },
+                                    },
+                                },
+                            },
+                        },
+                    },
+                },
             });
 
             for (const comment of mediaComments) {
-                if (!comment.authorId) continue;
+                const billedUserId = comment.version.video.project.workspace.ownerId;
+                if (!billedUserId) continue;
 
-                if (!userStorage[comment.authorId]) {
+                if (!userStorage[billedUserId]) {
-                    userStorage[comment.authorId] = { total: 0, voice: 0, image: 0 };
+                    userStorage[billedUserId] = { total: 0, voice: 0, image: 0 };
                 }
 
                 if (comment.voiceUrl) {
                     const keyParts = comment.voiceUrl.split('/');
                     const filename = keyParts[keyParts.length - 1];
                     const r2Key = `voice/${filename}`;
+                    const dedupeKey = `${billedUserId}:${r2Key}`;
+                    if (!seenKeys.has(dedupeKey)) {
+                        seenKeys.add(dedupeKey);
                         const size = fileSizes.get(r2Key) || 0;
-                    userStorage[comment.authorId].voice += size;
+                        userStorage[billedUserId].voice += size;
-                    userStorage[comment.authorId].total += size;
+                        userStorage[billedUserId].total += size;
+                    }
                 }
 
                 if (comment.imageUrl) {
                     const keyParts = comment.imageUrl.split('/');
                     const filename = keyParts[keyParts.length - 1];
                     const r2Key = `images/${filename}`;
+                    const dedupeKey = `${billedUserId}:${r2Key}`;
+                    if (!seenKeys.has(dedupeKey)) {
+                        seenKeys.add(dedupeKey);
                         const size = fileSizes.get(r2Key) || 0;
-                    userStorage[comment.authorId].image += size;
+                        userStorage[billedUserId].image += size;
-                    userStorage[comment.authorId].total += size;
+                        userStorage[billedUserId].total += size;
+                    }
                 }
             }
         } catch (err) {

lib/comment-tags.ts

@@ -0,0 +1,13 @@
+export interface DefaultCommentTag {
+  name: string;
+  color: string;
+  position: number;
+}
+
+export const DEFAULT_COMMENT_TAGS: DefaultCommentTag[] = [
+  { name: 'Feedback', color: '#3B82F6', position: 0 },
+  { name: 'Technical', color: '#EF4444', position: 1 },
+  { name: 'Creative', color: '#8B5CF6', position: 2 },
+  { name: 'Approved', color: '#22C55E', position: 3 },
+  { name: 'Urgent', color: '#F59E0B', position: 4 },
+];

lib/guest-identity.ts

@@ -0,0 +1,91 @@
+import { createHmac, randomUUID, timingSafeEqual } from 'crypto';
+import type { NextRequest, NextResponse } from 'next/server';
+
+const GUEST_IDENTITY_COOKIE_NAME = 'openframe_guest_identity';
+const GUEST_IDENTITY_TTL_SECONDS = 60 * 60 * 24 * 180; // 180 days
+
+interface GuestIdentityPayload {
+  gid: string;
+  exp: number;
+}
+
+function getGuestIdentitySecret(): string {
+  const secret = process.env.GUEST_IDENTITY_SECRET ?? process.env.AUTH_SECRET ?? process.env.NEXTAUTH_SECRET;
+  if (!secret) {
+    throw new Error('Missing GUEST_IDENTITY_SECRET, AUTH_SECRET, or NEXTAUTH_SECRET.');
+  }
+  return secret;
+}
+
+function sign(value: string): string {
+  return createHmac('sha256', getGuestIdentitySecret()).update(value).digest('base64url');
+}
+
+function createSignedValue(payload: GuestIdentityPayload): string {
+  const encodedPayload = Buffer.from(JSON.stringify(payload), 'utf8').toString('base64url');
+  const signature = sign(encodedPayload);
+  return `${encodedPayload}.${signature}`;
+}
+
+function parseSignedValue(value: string): GuestIdentityPayload | null {
+  const [encodedPayload, signature] = value.split('.');
+  if (!encodedPayload || !signature) return null;
+
+  const expectedSignature = sign(encodedPayload);
+  const actualBytes = Buffer.from(signature, 'utf8');
+  const expectedBytes = Buffer.from(expectedSignature, 'utf8');
+  if (actualBytes.length !== expectedBytes.length) return null;
+  if (!timingSafeEqual(actualBytes, expectedBytes)) return null;
+
+  try {
+    const payload = JSON.parse(Buffer.from(encodedPayload, 'base64url').toString('utf8')) as Partial<GuestIdentityPayload>;
+    if (!payload.gid || typeof payload.gid !== 'string') return null;
+    if (!payload.exp || typeof payload.exp !== 'number' || !Number.isFinite(payload.exp)) return null;
+    if (payload.exp <= Math.floor(Date.now() / 1000)) return null;
+    return { gid: payload.gid, exp: payload.exp };
+  } catch {
+    return null;
+  }
+}
+
+function createGuestIdentityValue(identityId: string): string {
+  return createSignedValue({
+    gid: identityId,
+    exp: Math.floor(Date.now() / 1000) + GUEST_IDENTITY_TTL_SECONDS,
+  });
+}
+
+function cookieOptions(maxAge: number) {
+  return {
+    httpOnly: true,
+    secure: process.env.NODE_ENV === 'production',
+    sameSite: 'lax' as const,
+    path: '/',
+    maxAge,
+  };
+}
+
+export function getGuestIdentityFromRequest(request: NextRequest): string | null {
+  const raw = request.cookies.get(GUEST_IDENTITY_COOKIE_NAME)?.value;
+  if (!raw) return null;
+  const payload = parseSignedValue(raw);
+  return payload?.gid ?? null;
+}
+
+export function ensureGuestIdentityFromRequest(request: NextRequest): { identityId: string; shouldSetCookie: boolean } {
+  const existingIdentity = getGuestIdentityFromRequest(request);
+  if (existingIdentity) {
+    return { identityId: existingIdentity, shouldSetCookie: false };
+  }
+
+  return { identityId: randomUUID(), shouldSetCookie: true };
+}
+
+export function setGuestIdentityCookie(response: NextResponse, identityId: string): void {
+  response.cookies.set(
+    GUEST_IDENTITY_COOKIE_NAME,
+    createGuestIdentityValue(identityId),
+    cookieOptions(GUEST_IDENTITY_TTL_SECONDS)
+  );
+}
+

lib/guest-upload-token.ts

@@ -0,0 +1,189 @@
+import { createHash, createHmac, timingSafeEqual } from 'crypto';
+import { NextResponse } from 'next/server';
+import { checkRateLimit, getClientIp, rateLimitHeaders } from '@/lib/rate-limit';
+
+const GUEST_UPLOAD_TOKEN_TYPE = 'guest-upload';
+const DEFAULT_GUEST_UPLOAD_TOKEN_TTL_SECONDS = 60 * 3;
+const GUEST_UPLOAD_VIDEO_WINDOW_MS = 15 * 60 * 1000;
+const GUEST_UPLOAD_VIDEO_MAX_REQUESTS = 12;
+const GUEST_UPLOAD_SESSION_WINDOW_MS = 15 * 60 * 1000;
+const GUEST_UPLOAD_SESSION_MAX_REQUESTS = 8;
+
+export type GuestUploadIntent = 'audio' | 'image';
+
+interface GuestUploadTokenPayload {
+  typ: typeof GUEST_UPLOAD_TOKEN_TYPE;
+  pid: string;
+  vid: string;
+  iat: number;
+  exp: number;
+  intent: GuestUploadIntent;
+  ctx: string;
+}
+
+interface GuestUploadTokenSubject {
+  projectId: string;
+  videoId: string;
+  intent: GuestUploadIntent;
+  context: string;
+}
+
+const TRUSTED_IP_PATTERN = /^[\da-fA-F.:]+$/;
+
+function getGuestUploadTokenSecret(): string {
+  const secret = process.env.GUEST_UPLOAD_TOKEN_SECRET ?? process.env.AUTH_SECRET ?? process.env.NEXTAUTH_SECRET;
+  if (!secret) {
+    throw new Error('Missing GUEST_UPLOAD_TOKEN_SECRET, AUTH_SECRET, or NEXTAUTH_SECRET.');
+  }
+  return secret;
+}
+
+function signPayload(encodedPayload: string): string {
+  return createHmac('sha256', getGuestUploadTokenSecret()).update(encodedPayload).digest('base64url');
+}
+
+function getCloudflareClientIp(request: Request): string | null {
+  const cfIp = request.headers.get('cf-connecting-ip')?.trim();
+  if (!cfIp) return null;
+  if (cfIp.length > 45 || !TRUSTED_IP_PATTERN.test(cfIp)) return null;
+  return cfIp;
+}
+
+function resolveTrustedClientIp(request: Request): string | null {
+  const cfIp = getCloudflareClientIp(request);
+  if (cfIp) return cfIp;
+
+  // In production, require Cloudflare-provided client IP to avoid spoofable header fallbacks.
+  if (process.env.NODE_ENV === 'production') {
+    return null;
+  }
+
+  return getClientIp(request);
+}
+
+function isValidPayload(value: unknown): value is GuestUploadTokenPayload {
+  if (!value || typeof value !== 'object') return false;
+  const payload = value as Partial<GuestUploadTokenPayload>;
+  return payload.typ === GUEST_UPLOAD_TOKEN_TYPE
+    && typeof payload.pid === 'string'
+    && typeof payload.vid === 'string'
+    && typeof payload.iat === 'number'
+    && Number.isFinite(payload.iat)
+    && typeof payload.exp === 'number'
+    && Number.isFinite(payload.exp)
+    && (payload.intent === 'audio' || payload.intent === 'image')
+    && typeof payload.ctx === 'string';
+}
+
+export function deriveGuestUploadContext(request: Request, shareToken: string | null): string | null {
+  const ip = resolveTrustedClientIp(request);
+  if (!ip) return null;
+
+  const shareFingerprint = shareToken
+    ? createHash('sha256').update(shareToken).digest('hex').slice(0, 24)
+    : 'public';
+  return `${ip}:${shareFingerprint}`;
+}
+
+export function createGuestUploadToken(
+  subject: GuestUploadTokenSubject,
+  ttlSeconds = DEFAULT_GUEST_UPLOAD_TOKEN_TTL_SECONDS
+): string {
+  const now = Math.floor(Date.now() / 1000);
+  const payload: GuestUploadTokenPayload = {
+    typ: GUEST_UPLOAD_TOKEN_TYPE,
+    pid: subject.projectId,
+    vid: subject.videoId,
+    iat: now,
+    exp: now + ttlSeconds,
+    intent: subject.intent,
+    ctx: subject.context,
+  };
+
+  const encodedPayload = Buffer.from(JSON.stringify(payload), 'utf8').toString('base64url');
+  const signature = signPayload(encodedPayload);
+  return `${encodedPayload}.${signature}`;
+}
+
+export function verifyGuestUploadToken(token: string, subject: GuestUploadTokenSubject): boolean {
+  try {
+    const parts = token.split('.');
+    if (parts.length !== 2) return false;
+
+    const [encodedPayload, providedSignature] = parts;
+    if (!encodedPayload || !providedSignature) return false;
+
+    const expectedSignature = signPayload(encodedPayload);
+    const providedBuffer = Buffer.from(providedSignature, 'utf8');
+    const expectedBuffer = Buffer.from(expectedSignature, 'utf8');
+    if (providedBuffer.length !== expectedBuffer.length) return false;
+    if (!timingSafeEqual(providedBuffer, expectedBuffer)) return false;
+
+    const payloadRaw = Buffer.from(encodedPayload, 'base64url').toString('utf8');
+    const payloadUnknown: unknown = JSON.parse(payloadRaw);
+    if (!isValidPayload(payloadUnknown)) return false;
+
+    const payload = payloadUnknown;
+    const now = Math.floor(Date.now() / 1000);
+    if (payload.exp < now) return false;
+
+    return payload.pid === subject.projectId
+      && payload.vid === subject.videoId
+      && payload.intent === subject.intent
+      && payload.ctx === subject.context;
+  } catch {
+    return false;
+  }
+}
+
+export async function enforceGuestUploadQuota(
+  request: Request,
+  videoId: string,
+  intent: GuestUploadIntent,
+  shareToken: string | null
+): Promise<NextResponse | null> {
+  const ip = resolveTrustedClientIp(request);
+  if (!ip) {
+    return NextResponse.json(
+      { error: 'Missing trusted client IP header' },
+      { status: 403 }
+    );
+  }
+
+  const videoScoped = await checkRateLimit(
+    `${ip}:guest-upload:${intent}:video:${videoId}`,
+    `guest-upload-${intent}-video`,
+    { windowMs: GUEST_UPLOAD_VIDEO_WINDOW_MS, maxRequests: GUEST_UPLOAD_VIDEO_MAX_REQUESTS }
+  );
+  if (!videoScoped.allowed) {
+    return NextResponse.json(
+      { error: 'Too many uploads for this video. Please wait before uploading again.' },
+      {
+        status: 429,
+        headers: rateLimitHeaders(videoScoped, GUEST_UPLOAD_VIDEO_MAX_REQUESTS),
+      }
+    );
+  }
+
+  if (!shareToken) return null;
+
+  const shareFingerprint = createHash('sha256').update(shareToken).digest('hex').slice(0, 24);
+  const sessionScoped = await checkRateLimit(
+    `${shareFingerprint}:guest-upload:${intent}`,
+    `guest-upload-${intent}-session`,
+    { windowMs: GUEST_UPLOAD_SESSION_WINDOW_MS, maxRequests: GUEST_UPLOAD_SESSION_MAX_REQUESTS }
+  );
+  if (!sessionScoped.allowed) {
+    return NextResponse.json(
+      { error: 'Too many uploads for this share session. Please wait before uploading again.' },
+      {
+        status: 429,
+        headers: rateLimitHeaders(sessionScoped, GUEST_UPLOAD_SESSION_MAX_REQUESTS),
+      }
+    );
+  }
+
+  return null;
+}
+
+export const guestUploadTokenTtlSeconds = DEFAULT_GUEST_UPLOAD_TOKEN_TTL_SECONDS;

lib/share-links.ts

@@ -16,6 +16,7 @@ interface ValidateShareLinkParams {
 export interface ShareLinkAccessResult {
   hasAccess: boolean;
   canComment: boolean;
+  canDownload: boolean;
   allowGuests: boolean;
   requiresPassword: boolean;
   link: ShareLink | null;
@@ -47,7 +48,7 @@ export async function validateShareLinkAccess({
   });
 
   if (!link) {
-    return { hasAccess: false, canComment: false, allowGuests: false, requiresPassword: false, link: null };
+    return { hasAccess: false, canComment: false, canDownload: false, allowGuests: false, requiresPassword: false, link: null };
   }
 
   const projectMatches = link.projectId === projectId;
@@ -56,27 +57,28 @@ export async function validateShareLinkAccess({
   const permissionMatches = hasRequiredPermission(link.permission, requiredPermission);
 
   if (!projectMatches || !videoMatches || !permissionMatches || isLinkExpired(link)) {
-    return { hasAccess: false, canComment: false, allowGuests: false, requiresPassword: false, link };
+    return { hasAccess: false, canComment: false, canDownload: false, allowGuests: false, requiresPassword: false, link };
   }
 
   if (link.passwordHash && !passwordVerified) {
     if (!presentedPassword) {
-      return { hasAccess: false, canComment: false, allowGuests: false, requiresPassword: true, link };
+      return { hasAccess: false, canComment: false, canDownload: false, allowGuests: false, requiresPassword: true, link };
     }
 
     if (presentedPassword.length > MAX_SHARE_PASSWORD_LENGTH) {
-      return { hasAccess: false, canComment: false, allowGuests: false, requiresPassword: true, link };
+      return { hasAccess: false, canComment: false, canDownload: false, allowGuests: false, requiresPassword: true, link };
     }
 
     const isPasswordValid = await bcrypt.compare(presentedPassword, link.passwordHash);
     if (!isPasswordValid) {
-      return { hasAccess: false, canComment: false, allowGuests: false, requiresPassword: true, link };
+      return { hasAccess: false, canComment: false, canDownload: false, allowGuests: false, requiresPassword: true, link };
     }
   }
 
   return {
     hasAccess: true,
     canComment: link.permission === 'COMMENT',
+    canDownload: link.allowDownloads,
     allowGuests: link.allowGuests,
     requiresPassword: false,
     link,

prisma/schema.prisma

@@ -310,6 +310,7 @@ model Comment {
   // Guest author info (when authorId is null)
   guestName     String?
   guestEmail    String?
+  guestIdentityId String?
   
   // Video version relation
   versionId     String
@@ -326,6 +327,7 @@ model Comment {
   @@index([versionId])
   @@index([parentId])
   @@index([authorId])
+  @@index([guestIdentityId])
   @@index([timestamp])
   @@index([tagId])
   @@index([versionId, isResolved, timestamp])
@@ -376,6 +378,7 @@ model ShareLink {
   
   // Settings
   allowGuests Boolean         @default(true) // Allow comments without account
+  allowDownloads Boolean      @default(false) // Allow downloading video via share link
   
   // Timestamps
   createdAt   DateTime        @default(now())