collapse 20 pass-through use cases; handlers call ports directly

delete get/list/list_by_owner channels, get_settings/activity_log admin,
get_item/get_sync_status/list_collections/list_seasons/list_shows/list_genres library,
get/list/delete providers, get/list/patch_label config_snapshots,
get_active/list_history/delete_after schedule — all single-delegation.

remove ChannelQueryDeps, LibraryQueryDeps, deleted query/command structs.
add direct port fields to AppState. update MCP crate accordingly.

crates/mcp/src/tools/channels.rs

@@ -1,31 +1,27 @@
 use std::sync::Arc;
 
 use application::channels::{
-    ChannelCommandDeps, ChannelQueryDeps, CreateChannelCommand, DeleteChannelCommand,
-    GetChannelQuery, ListByOwnerQuery, UpdateChannelCommand,
+    ChannelCommandDeps, CreateChannelCommand, DeleteChannelCommand, UpdateChannelCommand,
 };
 use uuid::Uuid;
 
 use crate::error::{domain_err, ok_json};
 
 pub async fn list_channels(
-    query_deps: &Arc<ChannelQueryDeps>,
+    channel_query: &Arc<dyn domain::ports::ChannelQuery>,
     owner_id: Uuid,
 ) -> String {
-    let query = ListByOwnerQuery {
-        owner_id: owner_id.into(),
-    };
-    match application::channels::list_by_owner::execute(query_deps, query).await {
+    match channel_query.find_by_owner(owner_id.into()).await {
         Ok(channels) => ok_json(&channels),
         Err(e) => domain_err(e),
     }
 }
 
-pub async fn get_channel(query_deps: &Arc<ChannelQueryDeps>, id: Uuid) -> String {
-    let query = GetChannelQuery {
-        channel_id: id.into(),
-    };
-    match application::channels::get::execute(query_deps, query).await {
+pub async fn get_channel(
+    channel_query: &Arc<dyn domain::ports::ChannelQuery>,
+    id: Uuid,
+) -> String {
+    match channel_query.find_by_id(id.into()).await {
         Ok(Some(channel)) => ok_json(&channel),
         Ok(None) => serde_json::json!({"error": "Channel not found"}).to_string(),
         Err(e) => domain_err(e),