fix(ebook-reader): load SVG images and fix progress update ID

- Add SVG image support: process <image xlink:href=...> elements
  in addition to HTML <img> tags for cover pages and embedded images
- Fix progress update: use 'id' from API response instead of
  'media_item_id' which the backend never returns for this endpoint
- Update reader context interfaces to include currentPage field
- Add debug logging for all resource keys to help troubleshoot
  image loading issues in future epubs

web/src/reader/core/reader-context.ts

@@ -28,7 +28,11 @@ interface MangaReader {
   readingDirection: "rtl" | "vertical";
 }
 
-type CurrentReader = UniversalReader | PDFReader | ComicReader | MangaReader;
+export type CurrentReader =
+  | UniversalReader
+  | PDFReader
+  | ComicReader
+  | MangaReader;
 
 export interface ReaderContext {
   getState: () => {

web/src/reader/core/reader-navigation.ts

@@ -279,6 +279,7 @@ export async function renderSpineItem() {
   if (!container || !spineItem) return;
   // Get the actual content from resources using the href
   const resources = state.currentReader.cif.resources;
+  console.log("ALL resource keys:", Array.from(resources.keys()));
   const contentBlob = resources?.get(spineItem.content);
   if (!contentBlob) {
     // Fallback: try to fetch directly if not in resources
@@ -326,16 +327,11 @@ export async function renderSpineItem() {
   // Rewrite image src paths to use blob URLs from resources
   const modifiedContent = rewriteImageUrls(contentText, resources);
 
-  const images = modifiedContent.match(/<img[^>]+>/g);
-  console.log("Found images in content:", images);
-  // Test resource lookup
-  console.log("Trying to find image:", {
-    direct: resources.get("image/1.png"),
-    withoutFolder: resources.get("1.png"),
-    allImageKeys: Array.from(resources.keys()).filter(
-      (k: string) => k.includes("image") || k.includes("png"),
-    ),
-  });
+  const htmlImages = modifiedContent.match(/<img[^>]+>/g);
+  const svgImages =
+    modifiedContent.match(/<image[^>]+xlink:href="([^"]+)"[^>]*>/gi) || [];
+  const allImages = [...htmlImages, ...svgImages];
+  console.log("Found images in content:", allImages);
 
   // Parse HTML and process images BEFORE setting innerHTML
   const parser = new DOMParser();
@@ -354,6 +350,20 @@ export async function renderSpineItem() {
       img.setAttribute("src", blobUrl);
     }
   }
+
+  // Process SVG <image> elements with xlink:href
+  const svgImgElements = Array.from(doc.querySelectorAll("image"));
+  for (const img of svgImgElements) {
+    const src = img.getAttribute("xlink:href");
+    if (!src) continue;
+
+    let blob = findImageInResources(resources, src);
+    if (blob) {
+      const blobUrl = URL.createObjectURL(blob);
+      img.setAttribute("xlink:href", blobUrl);
+    }
+  }
+
   container.innerHTML = doc.body.innerHTML;
   // Apply reader styling
   applyReaderTheme();
@@ -498,7 +508,7 @@ function sendProgressUpdate() {
   if (!state.currentReader || !state.readerMetadata) return;
 
   const mediaItemId =
-    state.readerMetadata.media_item_id ||
+    state.readerMetadata.id ||
     document.body.dataset.mediaItemId ||
     window.location.pathname.split("/").pop();
 
@@ -541,7 +551,7 @@ function sendProgressUpdate() {
   const percentage = totalPages > 0 ? (currentPage / totalPages) * 100 : 0;
 
   updateReadingProgress(
-    state.readerMetadata.media_item_id,
+    state.readerMetadata.id,
     {
       current_page: currentPage,
       total_pages: totalPages,

web/src/reader/core/reader-state.ts

@@ -1,4 +1,4 @@
-import type { ReaderMetadata, ReaderState } from "./reader-context";
+import type { ReaderState } from "./reader-context";
 
 type CurrentReader = import("./reader-context").CurrentReader;
 

web/src/types/reader.d.ts

@@ -72,7 +72,7 @@ interface ParserCapabilities {
 // ============================================================
 
 interface ReaderMetadata {
-  media_item_id: string;
+  id: string;
   title: string;
   author: string;
   cover_image_path: string;