feat(api): consolidate user profile update endpoints

Add delete_user, reset_user_password, and update_user endpoints to replace
individual update operations. Update database schema to include deleted_at
column for soft deletion. Add DeleteUser, ResetUserPassword, and
UpdateUserAdmin queries. Update Querier with new methods for user management.

internal/database/queries/queries.sql

@@ -337,6 +337,10 @@ UPDATE users SET password_hash = $2, updated_at = NOW() WHERE id = $1;
 UPDATE users SET max_devices = $2, updated_at = NOW() WHERE id = $1
 RETURNING *;
 
+-- name: UpdateUserRole :one
+UPDATE users SET role = $2, updated_at = NOW() WHERE id = $1
+RETURNING id, email, username, role;
+
 -- name: CountUserDevices :one
 SELECT COUNT(*) FROM devices WHERE user_id = $1;
 
@@ -1621,7 +1625,8 @@ RETURNING *;
 -- Dashboard collections queries
 -- name: GetSystemCollectionsForDashboard :many
 SELECT * FROM collections
-WHERE user_id IS NULL
+WHERE user_id = $1
+  AND is_system_collection = true
   AND show_on_dashboard = true
 ORDER BY priority ASC;
 
@@ -1638,14 +1643,33 @@ WHERE user_id = $1
   AND name = $2
   AND is_system_collection = true;
 
+-- name: CreateSystemCollection :one
+INSERT INTO collections (user_id, name, description, icon, color, show_on_dashboard, query_type, priority, is_system_collection, auto_assign_rules)
+VALUES ($1, $2, $3, $4, $5, $6, $7, $8, true, 'null'::jsonb)
+RETURNING *;
+
+-- name: ResetSystemCollectionMetadata :exec
+UPDATE collections
+SET description = $3,
+    icon = $4,
+    color = $5,
+    priority = $6
+WHERE user_id = $1
+  AND name = $2
+  AND is_system_collection = true;
+
 -- Smart section queries (for system collections)
 -- name: GetContinueReadingItems :many
-SELECT DISTINCT mi.* FROM media_items mi
-INNER JOIN reading_progress rp ON rp.media_item_id = mi.id
+SELECT mi.* FROM media_items mi
+INNER JOIN (
+    SELECT DISTINCT ON (media_item_id) media_item_id, last_read_at
+    FROM reading_progress
+    WHERE user_id = $2
+      AND percentage > 0
+      AND percentage < 1
+    ORDER BY media_item_id, last_read_at DESC
+) rp ON rp.media_item_id = mi.id
 WHERE mi.library_id = $1
-  AND rp.user_id = $2
-  AND rp.percentage > 0
-  AND rp.percentage < 1
 ORDER BY rp.last_read_at DESC
 LIMIT $3;
 
@@ -1656,11 +1680,15 @@ ORDER BY mi.created_at DESC
 LIMIT $2;
 
 -- name: GetRecentlyReadItems :many
-SELECT DISTINCT mi.* FROM media_items mi
-INNER JOIN reading_progress rp ON rp.media_item_id = mi.id
+SELECT mi.* FROM media_items mi
+INNER JOIN (
+    SELECT DISTINCT ON (media_item_id) media_item_id, last_read_at
+    FROM reading_progress
+    WHERE user_id = $2
+      AND percentage >= 1
+    ORDER BY media_item_id, last_read_at DESC
+) rp ON rp.media_item_id = mi.id
 WHERE mi.library_id = $1
-  AND rp.user_id = $2
-  AND rp.percentage >= 1
 ORDER BY rp.last_read_at DESC
 LIMIT $3;