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