refactor: fix HIGH+MEDIUM architectural violations from code review

HIGH: fix watch_medium data-loss bug, standardize error handling on
ApiError, fix dep direction (rss/template-askama no longer dep on
application), extract ImageFetcher port (remove reqwest from app layer),
move event construction from save_review to use case, extract
infra-wiring crate (DbPool/EventBusBackend dedup), deduplicate
presentation helpers (encode_error, export streaming, multipart parsing)

MEDIUM: split LocalApContentQuery god-trait 10→3 methods, dedup movie
resolution orchestration, add RemoteActorDto/PersonDto mappers, move
AppConfig to infra-wiring, fix SocialQueryPort Uuid→UserId, replace
stringly-typed api-types with domain enums, move count_reviews_in_year
to StatsRepository, dedup event publisher cfg blocks, extract
should_enrich, move group_by_month to application, dedup
count_local_posts, add FederationFlags Default, TUI input helper +
ShowError rename + typed auth errors, api-types cleanup
(UserSettingsDto/UserProfileBase/PreviewRowData)

102 files changed, -681 lines net

crates/application/src/diary/get_activity_feed.rs

@@ -6,6 +6,7 @@ use domain::{
         FeedEntry,
         collections::{PageParams, Paginated},
     },
+    value_objects::UserId,
 };
 
 pub async fn execute(
@@ -34,9 +35,10 @@ async fn build_following_filter(
         return None;
     }
     let viewer_id = query.viewer_user_id?;
+    let viewer = UserId::from_uuid(viewer_id);
     let urls = deps
         .social_query
-        .get_accepted_following_urls(viewer_id)
+        .get_accepted_following_urls(&viewer)
         .await
         .unwrap_or_default();
     if urls.is_empty() {