fix(reader): popover dismiss on PDF taps; notes save on create; colors don't close editor

- The in-book pointerdown dismiss listener lived in the reflowable-only
  block, so PDF taps never closed the selection popover — hoist it so
  every content doc (EPUB, PDF, comics) dismisses on tap.
- createHighlight hardcoded note_text: '' — 'Highlight with note' saved
  the highlight but silently dropped the note. Send p.note (and pass it
  to the EPUB overlayer).
- saveHighlightChanges collapsed the note editor on every save; color
  dots in create mode created a highlight outright. With the editor
  open, color dots now just recolor (create) or recolor-and-save with
  the editor kept open (edit).

templates/reader.templ

@@ -139,7 +139,13 @@ templ Reader(user User, metadata ReaderMetadata) {
 							:style="'background-color:' + c"
 							:title="selectionPopover.mode === 'create' ? 'Highlight' : 'Set color'"
 							:aria-label="'Highlight color ' + c"
-							@click="selectionPopover.mode === 'create' ? createHighlight(c) : (selectionPopover.color = c, saveHighlightChanges())"
+							@click="selectionPopover.noteOpen
+							? (selectionPopover.mode === 'create'
+								? (selectionPopover.color = c)
+								: (selectionPopover.color = c, saveHighlightChanges(true)))
+							: (selectionPopover.mode === 'create'
+								? createHighlight(c)
+								: (selectionPopover.color = c, saveHighlightChanges()))"
 						></button>
 					</template>
 					<div class="w-px h-5 reader-sep"></div>