Moments: per-user saved pages and regions with one category (BL-0055)

Reader: bookmark button and M save the page (Flow: page at the reading
line, Book: the spread) with an optional dragged region, exactly one
category (Twist, Hot, Awesome, Cute, Funny, Feels) and a note. I now
toggles the bars; ? lists all keys. Keys dispatch through public/keys.js,
which also feeds the new Settings -> Keyboard shortcuts section.

Manga page: "Your moments" strip of crops (story or recent order,
category filters), viewer with step, full page, edit, delete and
"Open in reader" (read.html ...&p=). Moments point at pages by file
name and show "page moved" when the file is gone. Private per user.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

public/app.css

@@ -502,3 +502,65 @@ body.nobars #bot { transform: translateY(100%); opacity: 0; pointer-events: none
   .seg button { padding: 7px 10px; } #bot .btn { padding: 6px 10px; } .wide-only { display: none; }
   .clock-panel { bottom: calc(124px + env(safe-area-inset-bottom)); }
 }
+
+/* ---------------- moments (BL-0055) ---------------- */
+.moment-btn.on { color: var(--accent); border-color: var(--accent); }
+.moment-btn.on svg path:first-child { fill: currentColor; }
+.moment-dialog { width: min(640px, calc(100vw - 16px)); max-height: calc(100vh - 16px); overflow: auto; color: var(--fg); background: var(--bg);
+  border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
+.moment-dialog::backdrop { background: #000c; }
+.moment-dialog h2 { margin: 0; font-size: 18px; }
+.moment-head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
+.moment-head > :first-child { flex: 1; min-width: 0; }
+.moment-context { font-weight: 600; }
+.moment-preview-wrap { display: flex; justify-content: center; margin: 12px 0 8px; }
+.moment-preview { position: relative; line-height: 0; }
+.moment-composite { position: relative; }
+.moment-page { position: absolute; top: 0; overflow: hidden; background: #19191c; }
+.moment-page img { display: block; width: 100%; height: 100%; -webkit-user-drag: none; user-select: none; }
+.region-layer { position: absolute; inset: 0; cursor: crosshair; touch-action: none; overflow: hidden; }
+.region-box { position: absolute; border: 2px solid #fff; outline: 1px solid #0008; box-shadow: 0 0 0 9999px #0009; pointer-events: none; }
+.moment-region-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; min-height: 32px; }
+.moment-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
+.moment-chip { display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border-radius: 18px; border: 1px solid var(--line);
+  background: var(--card); color: var(--fg); font: inherit; cursor: pointer; }
+.moment-chip:hover { background: var(--card2); }
+.moment-chip[aria-checked="true"] { border-color: var(--cat); background: color-mix(in srgb, var(--cat) 22%, var(--card)); box-shadow: 0 0 0 1px var(--cat); }
+.moment-dialog input[type=text] { width: 100%; }
+.moment-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 12px; }
+.moment-dialog .btn[disabled] { opacity: .45; pointer-events: none; }
+.moment-crop { position: relative; overflow: hidden; border-radius: 6px; background: #19191c; flex: none; }
+.moment-crop.missing { display: flex; align-items: center; justify-content: center; color: var(--muted); font-size: 13px; line-height: 1.2; text-align: center; }
+.moment-viewer { width: auto; max-width: calc(100vw - 16px); }
+.moment-viewer-body { display: flex; align-items: center; justify-content: center; gap: 8px; }
+.moment-viewer-stage { display: flex; justify-content: center; touch-action: pan-y; user-select: none; }
+.moment-viewer-info { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 12px; }
+.moment-tag { display: inline-flex; align-items: center; gap: 5px; padding: 2px 10px; border-radius: 12px; font-size: 13px;
+  border: 1px solid var(--cat); background: color-mix(in srgb, var(--cat) 18%, var(--card)); }
+.moment-note { flex-basis: 100%; color: var(--muted); font-style: italic; }
+.moment-nav { font-size: 22px; min-width: 40px; }
+@media (max-width: 600px) {
+  .moment-viewer-body { position: relative; }
+  .moment-nav { position: absolute; z-index: 1; background: #000a; }
+  .moment-nav.prev { left: 2px; } .moment-nav.next { right: 2px; }
+}
+.moments-card { max-width: none; }
+.moments-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 8px; }
+.moments-card h2 { margin: 0; }
+.moment-filters { display: flex; gap: 7px; overflow-x: auto; padding-bottom: 6px; }
+.moment-filter { display: inline-flex; align-items: center; gap: 5px; }
+.moment-strip { display: flex; gap: 10px; overflow-x: auto; padding: 4px 2px 10px; scrollbar-width: thin; }
+.moment-thumb { position: relative; flex: none; display: flex; flex-direction: column; gap: 4px; padding: 0; border: 0; background: none;
+  color: var(--fg); font: inherit; cursor: pointer; text-align: left; }
+.moment-thumb .moment-crop { transition: transform .15s; }
+.moment-thumb:hover .moment-crop, .moment-thumb:focus-visible .moment-crop { transform: scale(1.03); }
+.moment-thumb-cat { position: absolute; top: 5px; left: 5px; display: flex; padding: 3px; border-radius: 50%; background: #000b; }
+.moment-thumb-label { font-size: 12px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 200px; }
+.key-group h3 { margin: 4px 0 8px; font-size: 15px; }
+.key-group + .key-group { margin-top: 16px; }
+.key-table { border-collapse: collapse; width: 100%; }
+.key-table td { padding: 5px 8px; border-top: 1px solid var(--line); vertical-align: top; }
+.key-table td:first-child { width: 1%; white-space: nowrap; }
+kbd { display: inline-block; min-width: 24px; padding: 1px 7px; border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 5px;
+  background: var(--card2); font: 13px/1.5 ui-monospace, monospace; text-align: center; }
+@media (max-width: 480px) { .moment-dialog { padding: 12px; } .moment-actions .moment-hint { flex-basis: 100%; } .moment-actions .moment-hint:empty { display: none; } }