fix(web,api): UI fiche livre et lecteur — progression, locators EPUB/PDF, styles

- web: BookPage/ReaderPage enrichis, sauvegarde de progression lecteur
- web: locators EPUB/PDF normalisés (+ tests), EpubReader/PdfReader ajustés
- web: nginx et service worker ajustés
- api: progress — corrections contrôleur/service

Refs: #13

apps/web/src/styles/app.css

@@ -150,9 +150,10 @@ h2 {
 
 .book-card {
   display: grid;
-  grid-template-columns: 96px minmax(0, 1fr);
+  grid-template-columns: minmax(82px, 96px) minmax(0, 1fr);
   gap: 14px;
   min-height: 220px;
+  min-width: 0;
   padding: 14px;
   border: 1px solid var(--line);
   border-radius: var(--radius);
@@ -163,7 +164,10 @@ h2 {
 .book-portrait {
   display: grid;
   place-items: center;
-  min-height: 156px;
+  width: 100%;
+  min-width: 0;
+  aspect-ratio: 2 / 3;
+  min-height: 0;
   border: 1px solid rgba(213, 168, 77, 0.35);
   border-radius: 6px;
   background:
@@ -182,6 +186,13 @@ h2 {
 .book-card h3 {
   margin-bottom: 5px;
   line-height: 1.1;
+  overflow-wrap: anywhere;
+}
+
+.book-card-body {
+  display: grid;
+  align-content: start;
+  min-width: 0;
 }
 
 .book-card p,
@@ -211,6 +222,19 @@ h2 {
   justify-content: space-between;
 }
 
+.book-card-actions {
+  flex-wrap: wrap;
+  justify-content: flex-start;
+}
+
+.book-card-actions .ghost-button,
+.book-card-actions .primary-button {
+  flex: 1 1 86px;
+  min-width: 0;
+  padding-inline: 10px;
+  white-space: nowrap;
+}
+
 .format-pill {
   padding: 4px 7px;
   border-radius: 999px;
@@ -440,6 +464,11 @@ input {
 }
 
 .reader-fallback {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  justify-content: center;
+  gap: 10px;
   padding: 12px;
   color: var(--ink-muted);
 }
@@ -511,7 +540,11 @@ input {
   }
 
   .book-card {
-    grid-template-columns: 86px minmax(0, 1fr);
+    grid-template-columns: minmax(72px, 82px) minmax(0, 1fr);
+  }
+
+  .book-card-actions .ghost-button {
+    display: none;
   }
 
   .library-table > div,