feat: image storage generalization, user profile, and federation polish

- Replace PosterStorage with generic ImageStorage port (IMAGE_STORAGE_BACKEND/PATH env vars)
- Rename poster-storage crate to image-storage; serve at /images/{*key}
- Add bio and avatar_path to User model (migration 0009_user_profile)
- update_profile use case with avatar upload, mime validation, old avatar cleanup
- GET/PUT /api/v1/profile and GET/POST /settings/profile HTML page
- Enrich AP Person actor with summary, icon, url, discoverable fields
- Store remote actor avatar_url (migration 0010_ap_remote_actor_avatar)
- Shared inbox delivery via collect_inboxes deduplication
- Broadcast Update(Person) to followers on UserUpdated event
- Paginated outbox: OrderedCollection + OrderedCollectionPage with cursor
- Announce/boost tracking in ap_announces table (migration 0011_ap_announces)

crates/domain/src/models/mod.rs

@@ -290,6 +290,8 @@ pub struct User {
     username: Username,
     password_hash: PasswordHash,
     role: UserRole,
+    bio: Option<String>,
+    avatar_path: Option<String>,
 }
 
 impl User {
@@ -305,6 +307,8 @@ impl User {
             username,
             password_hash,
             role,
+            bio: None,
+            avatar_path: None,
         }
     }
 
@@ -314,6 +318,8 @@ impl User {
         username: Username,
         password_hash: PasswordHash,
         role: UserRole,
+        bio: Option<String>,
+        avatar_path: Option<String>,
     ) -> Self {
         Self {
             id,
@@ -321,6 +327,8 @@ impl User {
             username,
             password_hash,
             role,
+            bio,
+            avatar_path,
         }
     }
 
@@ -328,6 +336,11 @@ impl User {
         self.password_hash = new_hash;
     }
 
+    pub fn update_profile(&mut self, bio: Option<String>, avatar_path: Option<String>) {
+        self.bio = bio;
+        self.avatar_path = avatar_path;
+    }
+
     pub fn email(&self) -> &Email {
         &self.email
     }
@@ -343,6 +356,13 @@ impl User {
     pub fn role(&self) -> &UserRole {
         &self.role
     }
+    pub fn bio(&self) -> Option<&str> {
+        self.bio.as_deref()
+    }
+
+    pub fn avatar_path(&self) -> Option<&str> {
+        self.avatar_path.as_deref()
+    }
 }
 
 #[derive(Clone, Debug)]
@@ -435,3 +455,38 @@ pub enum ExportFormat {
     Csv,
     Json,
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::value_objects::{Email, PasswordHash, UserId, Username};
+
+    fn make_user() -> User {
+        User::from_persistence(
+            UserId::generate(),
+            Email::new("a@b.com".to_string()).unwrap(),
+            Username::new("alice".to_string()).unwrap(),
+            PasswordHash::new("hash".to_string()).unwrap(),
+            UserRole::Standard,
+            None,
+            None,
+        )
+    }
+
+    #[test]
+    fn update_profile_sets_fields() {
+        let mut user = make_user();
+        user.update_profile(Some("My bio".to_string()), Some("avatars/abc".to_string()));
+        assert_eq!(user.bio(), Some("My bio"));
+        assert_eq!(user.avatar_path(), Some("avatars/abc"));
+    }
+
+    #[test]
+    fn update_profile_clears_with_none() {
+        let mut user = make_user();
+        user.update_profile(Some("bio".to_string()), Some("path".to_string()));
+        user.update_profile(None, None);
+        assert_eq!(user.bio(), None);
+        assert_eq!(user.avatar_path(), None);
+    }
+}