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/book_detail_modals.templ

@@ -98,7 +98,7 @@ templ ProgressSyncModal(book handlers.MediaDetail) {
 					style="background-color: var(--bg-primary); border-color: var(--border);"
 				>
 					<div class="text-5xl font-bold mb-4" style="color: var(--accent);">
-						{ fmt.Sprintf("%.1f", book.ReadingProgress.Percentage.Float64) }%
+						{ fmt.Sprintf("%.1f", book.ReadingProgress.Percentage.Float64 * 100) }%
 					</div>
 					<p class="capitalize text-lg mb-2" style="color: var(--text-primary);">
 						{ book.ReadingProgress.LastSyncSource.String }