feat: Add MicroDAO Dashboard with activity feed and statistics

- Add microdao_activity table for news/updates/events
- Add statistics columns to microdaos table
- Implement dashboard API endpoints
- Create UI components (HeaderCard, ActivitySection, TeamSection)
- Add seed data for DAARION DAO
- Update backend models and repositories
- Add frontend types and API client

services/city-service/repo_city.py

@@ -4248,8 +4248,13 @@ async def get_microdao_dashboard(slug: str) -> dict:
     # Конвертувати citizens в PublicCitizenSummary
     citizen_summaries = []
     for citizen in citizens:
+        # Переконатися що slug не None
+        slug = citizen.get("slug")
+        if not slug:
+            continue  # Пропустити громадян без slug
+        
         citizen_summaries.append({
-            "slug": citizen.get("slug"),
+            "slug": slug,
             "display_name": citizen["display_name"],
             "public_title": citizen.get("public_title"),
             "public_tagline": citizen.get("public_tagline"),
@@ -4257,7 +4262,7 @@ async def get_microdao_dashboard(slug: str) -> dict:
             "kind": citizen.get("kind"),
             "district": citizen.get("district"),
             "primary_room_slug": citizen.get("primary_room_slug"),
-            "public_skills": citizen.get("public_skills", []),
+            "public_skills": list(citizen.get("public_skills", [])) if citizen.get("public_skills") else [],
             "online_status": citizen.get("status", "unknown"),
             "status": citizen.get("status"),
             "node_id": citizen.get("node_id"),
@@ -4268,15 +4273,20 @@ async def get_microdao_dashboard(slug: str) -> dict:
     # Конвертувати activity в MicrodaoActivity
     activity_list = []
     for act in activity:
+        # Конвертувати UUID в string, якщо потрібно
+        author_id = act.get("author_agent_id")
+        if author_id:
+            author_id = str(author_id) if not isinstance(author_id, str) else author_id
+        
         activity_list.append({
             "id": str(act["id"]),
             "microdao_slug": act["microdao_slug"],
             "kind": act["kind"],
             "title": act.get("title"),
             "body": act["body"],
-            "author_agent_id": str(act["author_agent_id"]) if act.get("author_agent_id") else None,
+            "author_agent_id": author_id,
             "author_name": act.get("author_name"),
-            "created_at": act["created_at"]
+            "created_at": act["created_at"].isoformat() if hasattr(act["created_at"], "isoformat") else str(act["created_at"])
         })
     
     # Створити MicrodaoSummary
@@ -4305,11 +4315,17 @@ async def get_microdao_dashboard(slug: str) -> dict:
     }
     
     # Створити stats
+    last_update = microdao.get("updated_at")
+    if last_update and hasattr(last_update, "isoformat"):
+        last_update = last_update.isoformat()
+    elif last_update:
+        last_update = str(last_update)
+    
     stats = {
         "rooms_count": rooms_count,
         "citizens_count": citizens_count,
         "agents_count": agents_count,
-        "last_update_at": microdao.get("updated_at")
+        "last_update_at": last_update
     }
     
     return {