Add fediverse social features: followers/following lists, actor timelines

Adds get_followers_paginated and get_actor_timeline to FederationService
protocol + SQL implementation + stubs. Includes accumulated federation
changes: models, DTOs, delivery handler, webfinger, inline publishing,
widget nav templates, and migration.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

contracts/protocols.py

@@ -22,6 +22,10 @@ from .dtos import (
     ActorProfileDTO,
     APActivityDTO,
     APFollowerDTO,
+    RemoteActorDTO,
+    RemotePostDTO,
+    TimelineItemDTO,
+    NotificationDTO,
 )
 
 
@@ -217,6 +221,11 @@ class FederationService(Protocol):
         self, session: AsyncSession, username: str,
     ) -> list[APFollowerDTO]: ...
 
+    async def get_followers_paginated(
+        self, session: AsyncSession, username: str,
+        page: int = 1, per_page: int = 20,
+    ) -> tuple[list[RemoteActorDTO], int]: ...
+
     async def add_follower(
         self, session: AsyncSession, username: str,
         follower_acct: str, follower_inbox: str, follower_actor_url: str,
@@ -227,5 +236,108 @@ class FederationService(Protocol):
         self, session: AsyncSession, username: str, follower_acct: str,
     ) -> bool: ...
 
+    # -- Remote actors --------------------------------------------------------
+    async def get_or_fetch_remote_actor(
+        self, session: AsyncSession, actor_url: str,
+    ) -> RemoteActorDTO | None: ...
+
+    async def search_remote_actor(
+        self, session: AsyncSession, acct: str,
+    ) -> RemoteActorDTO | None: ...
+
+    # -- Following (outbound) -------------------------------------------------
+    async def send_follow(
+        self, session: AsyncSession, local_username: str, remote_actor_url: str,
+    ) -> None: ...
+
+    async def get_following(
+        self, session: AsyncSession, username: str,
+        page: int = 1, per_page: int = 20,
+    ) -> tuple[list[RemoteActorDTO], int]: ...
+
+    async def accept_follow_response(
+        self, session: AsyncSession, local_username: str, remote_actor_url: str,
+    ) -> None: ...
+
+    async def unfollow(
+        self, session: AsyncSession, local_username: str, remote_actor_url: str,
+    ) -> None: ...
+
+    # -- Remote posts ---------------------------------------------------------
+    async def ingest_remote_post(
+        self, session: AsyncSession, remote_actor_id: int,
+        activity_json: dict, object_json: dict,
+    ) -> None: ...
+
+    async def delete_remote_post(
+        self, session: AsyncSession, object_id: str,
+    ) -> None: ...
+
+    async def get_remote_post(
+        self, session: AsyncSession, object_id: str,
+    ) -> RemotePostDTO | None: ...
+
+    # -- Timelines ------------------------------------------------------------
+    async def get_home_timeline(
+        self, session: AsyncSession, actor_profile_id: int,
+        before: datetime | None = None, limit: int = 20,
+    ) -> list[TimelineItemDTO]: ...
+
+    async def get_public_timeline(
+        self, session: AsyncSession,
+        before: datetime | None = None, limit: int = 20,
+    ) -> list[TimelineItemDTO]: ...
+
+    async def get_actor_timeline(
+        self, session: AsyncSession, remote_actor_id: int,
+        before: datetime | None = None, limit: int = 20,
+    ) -> list[TimelineItemDTO]: ...
+
+    # -- Local posts ----------------------------------------------------------
+    async def create_local_post(
+        self, session: AsyncSession, actor_profile_id: int,
+        content: str, visibility: str = "public",
+        in_reply_to: str | None = None,
+    ) -> int: ...
+
+    async def delete_local_post(
+        self, session: AsyncSession, actor_profile_id: int, post_id: int,
+    ) -> None: ...
+
+    # -- Interactions ---------------------------------------------------------
+    async def like_post(
+        self, session: AsyncSession, actor_profile_id: int,
+        object_id: str, author_inbox: str,
+    ) -> None: ...
+
+    async def unlike_post(
+        self, session: AsyncSession, actor_profile_id: int,
+        object_id: str, author_inbox: str,
+    ) -> None: ...
+
+    async def boost_post(
+        self, session: AsyncSession, actor_profile_id: int,
+        object_id: str, author_inbox: str,
+    ) -> None: ...
+
+    async def unboost_post(
+        self, session: AsyncSession, actor_profile_id: int,
+        object_id: str, author_inbox: str,
+    ) -> None: ...
+
+    # -- Notifications --------------------------------------------------------
+    async def get_notifications(
+        self, session: AsyncSession, actor_profile_id: int,
+        before: datetime | None = None, limit: int = 20,
+    ) -> list[NotificationDTO]: ...
+
+    async def unread_notification_count(
+        self, session: AsyncSession, actor_profile_id: int,
+    ) -> int: ...
+
+    async def mark_notifications_read(
+        self, session: AsyncSession, actor_profile_id: int,
+    ) -> None: ...
+
     # -- Stats ----------------------------------------------------------------
     async def get_stats(self, session: AsyncSession) -> dict: ...