refactor(reader): add supporting changes for pagination system

Supporting updates for the new page-based pagination architecture:

settings-manager.ts:
- Export loadSettings function for use in reader initialization
- Allow external modules to access user reading preferences

gestures.ts:
- Update import paths for panel detection modules
- Reflect new format-specific directory structure

types/reader.d.ts:
- Add saved_progress field to ReaderMetadata interface
- Include current_page, cfi, and progress fields
- Enable type-safe access to restored reading position

These changes enable the pagination system to access user
settings and properly type restored progress data.

web/src/reader/settings-manager.ts

@@ -52,7 +52,7 @@ export function init(context: ReaderContext): void {
   });
 }
 
-async function loadSettings(): Promise<ReaderSettings> {
+export async function loadSettings(): Promise<ReaderSettings> {
   const token = getToken();
   if (!token) {
     const local = localStorage.getItem(LOCALSTORAGE_KEY);

web/src/reader/ui/gestures.ts

@@ -1,5 +1,5 @@
-import type { Panel } from "../comic/panel-detector";
-import { detectPanels } from "../comic/panel-detection.service";
+import type { Panel } from "../formats/comic/panel-detector";
+import { detectPanels } from "../formats/comic/panel-detection.service";
 import type { ReaderContext } from "../core/reader-context";
 
 let currentPanelIndex = 0;

web/src/types/reader.d.ts

@@ -84,6 +84,11 @@ interface ReaderMetadata {
   file_path: string;
   chapter_metadata?: ChapterMetadata;
   total_pages?: number;
+  saved_progress?: {
+    current_page?: number;
+    cfi?: string;
+    progress?: number;
+  };
 }
 
 // ============================================================