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

internal/router/reader.go

@@ -4,6 +4,7 @@ import (
 	"bookhoard/internal/database"
 	"bookhoard/internal/handlers"
 	"bookhoard/internal/services"
+	"bookhoard/internal/sync"
 	"bookhoard/internal/utils"
 	"bookhoard/templates"
 	"bytes"
@@ -100,20 +101,25 @@ func registerReaderRoutes(cfg *Config) {
 			ReadingDirection: textToString(mediaItem.ReadingDirection),
 			LibraryID:        libUUID.String(),
 			FileURL:          utils.ResolveMediaURL(mediaItem.LibraryID, pgtype.Text{String: mediaItem.FilePath, Valid: true}),
+			TotalCharacters:  mediaItem.TotalCharacters.Int64,
+			EstimatedPages:   sync.EstimatedPages(mediaItem.TotalCharacters.Int64),
 		}
 		// Progress conversion (inline)
 		progressUUID, _ := uuid.FromBytes(progress.ID.Bytes[0:16])
 		progressMediaUUID, _ := uuid.FromBytes(progress.MediaItemID.Bytes[0:16])
 		progressUserUUID, _ := uuid.FromBytes(progress.UserID.Bytes[0:16])
 		templateProgress := templates.ReadingProgress{
-			ID:          progressUUID.String(),
-			MediaItemID: progressMediaUUID.String(),
-			UserID:      progressUserUUID.String(),
-			CurrentPage: int(progress.CurrentPage.Int32),
-			TotalPages:  int(progress.TotalPages.Int32),
-			Percentage:  progress.Percentage.Float64,
-			EpubCfi:     textToString(progress.Epubcfi),
-			LastReadAt:  progress.LastReadAt.Time,
+			ID:              progressUUID.String(),
+			MediaItemID:     progressMediaUUID.String(),
+			UserID:          progressUserUUID.String(),
+			CurrentPage:     int(progress.CurrentPage.Int32),
+			TotalPages:      int(progress.TotalPages.Int32),
+			Percentage:      progress.Percentage.Float64 * 100,
+			EpubCfi:         textToString(progress.Epubcfi),
+			LastReadAt:      progress.LastReadAt.Time,
+			Chapter:         int(progress.Chapter.Int32),
+			ChapterProgress: progress.ChapterProgress.Float64 * 100,
+			FormatGroup:     mediaItem.FormatGroup,
 		}
 		// Bookmarks conversion (inline, with loop)
 		templateBookmarks := make([]templates.Bookmark, len(bookmarks))