diff --git a/src/app/[handle]/page.tsx b/src/app/[handle]/page.tsx
index 63934e8..3676a50 100644
--- a/src/app/[handle]/page.tsx
+++ b/src/app/[handle]/page.tsx
@@ -154,14 +154,12 @@ export default function ProfilePage() {
         const method = isFollowing ? 'DELETE' : 'POST';
         const res = await fetch(`/api/users/${handle}/follow`, { method });
 
-        if (res.ok) {
+        if (res.ok && user) {
             setIsFollowing(!isFollowing);
-            if (user) {
-                setUser({
-                    ...user,
-                    followersCount: isFollowing ? user.followersCount - 1 : user.followersCount + 1,
-                });
-            }
+            setUser({
+                ...user,
+                followersCount: isFollowing ? (user.followersCount || 0) - 1 : (user.followersCount || 0) + 1,
+            });
         }
     };
 
@@ -352,7 +350,7 @@ export default function ProfilePage() {
                             fontSize: '14px',
                         }}>
                             <CalendarIcon />
-                            <span>Joined {formatDate(user.createdAt)}</span>
+                            <span>Joined {formatDate(user.createdAt || new Date().toISOString())}</span>
                         </div>
 
                         <div style={{ display: 'flex', gap: '16px', marginTop: '12px' }}>
diff --git a/src/app/api/posts/[id]/repost/route.ts b/src/app/api/posts/[id]/repost/route.ts
index efa6e7f..3486b9c 100644
--- a/src/app/api/posts/[id]/repost/route.ts
+++ b/src/app/api/posts/[id]/repost/route.ts
@@ -1,7 +1,7 @@
 import { NextResponse } from 'next/server';
 import { db, posts, users, notifications } from '@/db';
 import { requireAuth } from '@/lib/auth';
-import { eq } from 'drizzle-orm';
+import { eq, and } from 'drizzle-orm';
 
 type RouteContext = { params: Promise<{ id: string }> };
 
diff --git a/src/app/api/posts/[id]/route.ts b/src/app/api/posts/[id]/route.ts
index b213ae0..b3ca352 100644
--- a/src/app/api/posts/[id]/route.ts
+++ b/src/app/api/posts/[id]/route.ts
@@ -70,13 +70,13 @@ export async function GET(
                     ...post,
                     isLiked: likedPostIds.has(post.id),
                     isReposted: repostedPostIds.has(post.id),
-                };
+                } as any;
 
                 replyPosts = replies.map(r => ({
                     ...r,
                     isLiked: likedPostIds.has(r.id),
                     isReposted: repostedPostIds.has(r.id),
-                }));
+                })) as any;
             }
         } catch {
             // Not authenticated or other error, skip flags
diff --git a/src/app/api/posts/route.ts b/src/app/api/posts/route.ts
index 57564e8..16263e0 100644
--- a/src/app/api/posts/route.ts
+++ b/src/app/api/posts/route.ts
@@ -328,7 +328,7 @@ export async function GET(request: Request) {
                         ...p,
                         isLiked: likedPostIds.has(p.id),
                         isReposted: repostedPostIds.has(p.id),
-                    }));
+                    })) as any;
                 }
             }
         } catch (error) {
diff --git a/src/components/PostCard.tsx b/src/components/PostCard.tsx
index 798a3fa..1aec5be 100644
--- a/src/components/PostCard.tsx
+++ b/src/components/PostCard.tsx
@@ -1,14 +1,14 @@
 'use client';
 
-import { useState } from 'react';
+import { useState, useEffect } from 'react';
 import Link from 'next/link';
 import { HeartIcon, RepeatIcon, MessageIcon, FlagIcon } from '@/components/Icons';
 import { Post } from '@/lib/types';
 
 interface PostCardProps {
     post: Post;
-    onLike?: (id: string) => void;
-    onRepost?: (id: string) => void;
+    onLike?: (id: string, currentLiked: boolean) => void;
+    onRepost?: (id: string, currentReposted: boolean) => void;
     onComment?: (post: Post) => void;
     isDetail?: boolean;
 }