fix(books): tri des séries par volume + suppression de l'ancienne extract_page

- Ajout de `b.volume NULLS LAST` comme première clé de tri dans list_books
  et dans tous les ROW_NUMBER() OVER (...) des CTEs series, pour corriger
  l'ordre des volumes dont les titres varient en format (ex: "Round" vs "R")
- Suppression de l'ancienne extract_page publique et de ses 4 helpers
  (extract_cbz_page_n, extract_cbz_page_n_streaming, extract_cbr_page_n,
  extract_pdf_page_n) remplacés par la nouvelle implémentation avec cache
- Suppression de archive_index_cache dans AppState (remplacé par le cache
  statique CBZ_INDEX_CACHE dans parsers), import StdMutex nettoyé

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

apps/api/src/books.rs

@@ -141,7 +141,7 @@ pub async fn list_books(
     let order_clause = if query.sort.as_deref() == Some("latest") {
         "b.updated_at DESC".to_string()
     } else {
-        "REGEXP_REPLACE(LOWER(b.title), '[0-9]+', '', 'g'), COALESCE((REGEXP_MATCH(LOWER(b.title), '\\d+'))[1]::int, 0), b.title ASC".to_string()
+        "b.volume NULLS LAST, REGEXP_REPLACE(LOWER(b.title), '[0-9]+', '', 'g'), COALESCE((REGEXP_MATCH(LOWER(b.title), '\\d+'))[1]::int, 0), b.title ASC".to_string()
     };
 
     // DATA: mêmes params filtre, puis $N+1=limit $N+2=offset
@@ -400,6 +400,7 @@ pub async fn list_series(
                 ROW_NUMBER() OVER (
                     PARTITION BY COALESCE(NULLIF(series, ''), 'unclassified')
                     ORDER BY
+                        volume NULLS LAST,
                         REGEXP_REPLACE(LOWER(title), '[0-9]+', '', 'g'),
                         COALESCE((REGEXP_MATCH(LOWER(title), '\d+'))[1]::int, 0),
                         title ASC
@@ -586,6 +587,7 @@ pub async fn list_all_series(
                 ROW_NUMBER() OVER (
                     PARTITION BY COALESCE(NULLIF(series, ''), 'unclassified')
                     ORDER BY
+                        volume NULLS LAST,
                         REGEXP_REPLACE(LOWER(title), '[0-9]+', '', 'g'),
                         COALESCE((REGEXP_MATCH(LOWER(title), '\d+'))[1]::int, 0),
                         title ASC
@@ -714,6 +716,7 @@ pub async fn ongoing_series(
                 ROW_NUMBER() OVER (
                     PARTITION BY COALESCE(NULLIF(series, ''), 'unclassified')
                     ORDER BY
+                        volume NULLS LAST,
                         REGEXP_REPLACE(LOWER(title), '[0-9]+', '', 'g'),
                         COALESCE((REGEXP_MATCH(LOWER(title), '\d+'))[1]::int, 0),
                         title ASC

apps/api/src/main.rs

@@ -30,7 +30,6 @@ use std::num::NonZeroUsize;
 use stripstream_core::config::ApiConfig;
 use sqlx::postgres::PgPoolOptions;
 use tokio::sync::{Mutex, RwLock, Semaphore};
-use std::sync::Mutex as StdMutex;
 use tracing::info;
 
 use crate::state::{load_concurrent_renders, load_dynamic_settings, AppState, Metrics, ReadRateLimit};
@@ -78,7 +77,6 @@ async fn main() -> anyhow::Result<()> {
             requests_in_window: 0,
         })),
         settings: Arc::new(RwLock::new(dynamic_settings)),
-        archive_index_cache: Arc::new(StdMutex::new(LruCache::new(NonZeroUsize::new(256).expect("non-zero")))),
     };
 
     let admin_routes = Router::new()

apps/api/src/state.rs

@@ -1,7 +1,6 @@
 use std::sync::{
     atomic::AtomicU64,
     Arc,
-    Mutex as StdMutex,
 };
 use std::time::Instant;
 
@@ -20,9 +19,6 @@ pub struct AppState {
     pub metrics: Arc<Metrics>,
     pub read_rate_limit: Arc<Mutex<ReadRateLimit>>,
     pub settings: Arc<RwLock<DynamicSettings>>,
-    /// Sorted image name list per archive path — avoids re-enumerating entries on every cold render.
-    /// Uses StdMutex (not tokio) so it's accessible from spawn_blocking.
-    pub archive_index_cache: Arc<StdMutex<LruCache<String, Arc<Vec<String>>>>>,
 }
 
 #[derive(Clone)]