feat(web): note editing at the reader slider and book banner; Deleted rename

Objective 8a (web half). Reader notes-drawer rows gain an inline editor
(mirroring the bookmark-rename pattern) that PUTs the new content — the
stored position rides along because the server's note PUT hard-sets the
position column (a probe note proved an omitted position NULLs the
anchor). Book-detail banner rows gain Edit/Delete for location notes
and Edit-note/Add-note for the note ATTACHED to a highlight (full-replace
highlight PUT; empty content clears the note; the highlight itself is
never edited from the banner). The edit dialog is centered with the
markdown caption.

The book-detail 'Notes' button becomes 'Deleted' (badge =
deleted-annotation count) and the modal title becomes 'Deleted
annotations' — that modal only ever showed removed annotations.

Verified live in Brave: drawer inline edit round-trips content and
position; banner note edit, highlight-note edit, and delete (tombstone
appears in the Deleted modal); rename renders with the count badge.

templates/book_detail_modals_templ.go

@@ -364,7 +364,7 @@ func NotesHighlightsModal(user User, book handlers.MediaDetail) templ.Component
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 35, "</span><div><h2 class=\"text-xl font-bold\" style=\"color: var(--text-primary)\">Notes &amp; Highlights</h2><p class=\"text-sm\" style=\"color: var(--text-secondary);\">")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 35, "</span><div><h2 class=\"text-xl font-bold\" style=\"color: var(--text-primary)\">Deleted annotations</h2><p class=\"text-sm\" style=\"color: var(--text-secondary);\">")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
@@ -377,7 +377,7 @@ func NotesHighlightsModal(user User, book handlers.MediaDetail) templ.Component
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 36, "</p></div></div><button @click=\"hideNotesModal()\" class=\"icon-btn\" aria-label=\"Close\">")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 36, " — restore or purge</p></div></div><button @click=\"hideNotesModal()\" class=\"icon-btn\" aria-label=\"Close\">")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}