feat(bot): implement admin review bot, inline keyboards and channel config

bot/keyboards.py

@@ -0,0 +1,18 @@
+from typing import List
+from telethon import Button
+from db.models import TargetChannel
+
+def get_review_keyboard(post_id: int, targets: List[TargetChannel]) -> List[List[Button]]:
+    keyboard = []
+    # Add a button for each target channel
+    for target in targets:
+        title = target.title or f"Target #{target.id}"
+        keyboard.append([
+            Button.inline(f"🚀 Send to {title}", data=f"appr:{post_id}:{target.id}")
+        ])
+
+    # Add Reject button
+    keyboard.append([
+        Button.inline("❌ Reject Post", data=f"rej:{post_id}")
+    ])
+    return keyboard