fix(progress): correct percentage display and add format-aware progress

Fix two bugs in progress display across book detail, progress page, reader,
and sync modal templates:

1. Percentage was stored as 0.0-1.0 fraction but displayed as-if 0-100
   (showing 0.5% instead of 50%). Multiply by 100 at the data source in
   both GetAllProgress and GetAllProgressData handlers, and in the reader
   route's ReadingProgress construction.

2. Progress bar width was never evaluated — { expr } inside style=".."
   was rendered as literal text by templ, resulting in 0% width bars for
   all items. Fixed by using templ's style={ expr } attribute syntax
   which evaluates the Go expression (uses SanitizeStyleAttributeValues).

Also add format-aware progress display:
- Reader template: shows "45% · Page 89/196" for reflowable (estimated
  pages), "127/342" for comics/PDFs (actual pages)
- Progress page: shows "Page X of Y (est.)" for reflowable, "X / Y"
  for fixed layout
- Add FormatGroup and EstimatedPages to ProgressWithMedia struct
- Remove hardcoded totalPages=200 fallback in progress handler (now 0)
- Add fmt import to progress.templ for string formatting

templates/reader.templ

@@ -155,7 +155,15 @@ templ ReaderChrome(user User, metadata ReaderMetadata, progress ReadingProgress)
 				<div class="w-px h-6 bg-gray-600 mx-1"></div>
 				<!-- Progress display -->
 				<div id="progress-display" x-text="progressText" data-progress-mode="pages" class="text-sm min-w-[4rem] text-center">
-					{ fmt.Sprintf("%d/%d", progress.CurrentPage, progress.TotalPages) }
+					if progress.FormatGroup == "reflowable" {
+						if metadata.EstimatedPages > 0 {
+							{ fmt.Sprintf("%.0f%% · Page %d/%d", progress.Percentage, progress.CurrentPage, metadata.EstimatedPages) }
+						} else {
+							{ fmt.Sprintf("%.0f%%", progress.Percentage) }
+						}
+					} else {
+						{ fmt.Sprintf("%d/%d", progress.CurrentPage, progress.TotalPages) }
+					}
 				</div>
 				<!-- Separator -->
 				<div class="w-px h-6 bg-gray-600 mx-1"></div>