feat(web): permanent action key under the tabs

The card action strip is icon-only, so nothing on screen said what the
six glyphs do. Add a keyrow line under the tabs that names each one.

The key follows the tab, not the row: archived and finished swap Archive
for Restore, and finished drops Done — same conditions card.html already
uses for the buttons themselves. It therefore rides along in
writeChromeOOB, or a tab switch would leave the previous bucket's key.

Also from the Claude Design pass: per-action accent colours on hover and
press (slate archive, moss finished, clay chapter) so a press says which
lane it belongs to, a slightly larger cover and title, and the favourite
mark pinned to the right edge of the measure instead of trailing the
title, which drifted whenever a new-chapter title shrink-wrapped.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

backend/static/style.css

@@ -81,6 +81,11 @@
   --danger-ink: #150808;
   --danger-soft: #e2aaa1;
   --brass: #b8912f;        /* favourite — a second, cooler metal */
+  /* One accent per action, so a press says which lane it belongs to. All three
+   are held at the same weight as --brass: muted, no ember competition. */
+  --slate: #7fa0c0;        /* archive */
+  --moss: #7fae86;         /* finished */
+  --clay: #b5906f;         /* set chapter */
   --trash: #977671;        /* remove, resting — icons need 3:1, not 4.5:1 */
 
   /* Desktop cell borders for the two coloured action states. */
@@ -98,7 +103,7 @@
   --measure: 760px;
   /* Cover width + row gap: the disclosure panels indent past the cover on
      desktop, so both live here rather than as magic numbers. */
-  --cover-w: 86px;
+  --cover-w: 93px;
   --row-gap: 14px;
 }
 
@@ -131,6 +136,9 @@
     --danger-ink: #fff;
     --danger-soft: #7c2c22;
     --brass: #8a681c;
+    --slate: #3f6689;
+    --moss: #3d6c46;
+    --clay: #7c5533;
     --trash: #8c6558;
 
     --play-hot-line: #f0cfc6;
@@ -285,6 +293,35 @@ button { cursor: pointer; }
   border: 1px solid currentColor;
 }
 
+/* ---- action key: one permanent line under the tabs, so the icon strip below
+   never has to be guessed at. Lean on a phone (28px, edge to edge), a step
+   bigger on desktop where there is room to read it. ---- */
+.keyrow {
+  display: flex;
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: 10px;
+  padding: 9px 18px 10px;
+  border-bottom: 1px solid var(--rule);
+}
+/* On a phone each key stacks: icon over word, so the word gets the full cell
+   width and can stay the long form. */
+.keyrow .pair {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 6px;
+  color: var(--mute);
+}
+.keyrow .pair svg { width: 14px; height: 14px; flex: none; }
+.keyrow .pair span {
+  font: 500 10px/1 var(--font-mono);
+  letter-spacing: .04em;
+  text-transform: uppercase;
+}
+.keyrow .pair.brass svg { color: var(--brass); }
+.keyrow .pair.trash svg { color: var(--trash); }
+
 /* ---- continue reading ---- */
 .recent {
   display: flex;
@@ -311,7 +348,7 @@ button { cursor: pointer; }
 }
 .recent-strip::-webkit-scrollbar { display: none; }
 .recent-card {
-  width: 92px;
+  width: var(--cover-w);
   flex: none;
   display: flex;
   flex-direction: column;
@@ -319,8 +356,8 @@ button { cursor: pointer; }
 }
 .recent-cover {
   position: relative;
-  width: 92px;
+  width: var(--cover-w);
-  height: 123px;
+  height: calc(var(--cover-w) * 4 / 3);
   background: var(--hatch);
   display: grid;
   place-items: center;
@@ -328,7 +365,7 @@ button { cursor: pointer; }
 }
 .recent-cover img { width: 100%; height: 100%; object-fit: cover; }
 .recent-title {
-  font: 400 15px/1.2 var(--font-display);
+  font: 400 16px/1.25 var(--font-display);
   color: var(--paper-dim);
   display: -webkit-box;
   -webkit-line-clamp: 2;
@@ -336,7 +373,7 @@ button { cursor: pointer; }
   overflow: hidden;
 }
 .recent-chapter {
-  font: 500 10px/1 var(--font-mono);
+  font: 500 11px/1 var(--font-mono);
   letter-spacing: .1em;
   color: var(--mute-2);
 }
@@ -374,7 +411,7 @@ button { cursor: pointer; }
 }
 .card.is-dim { background: var(--dim); }
 
-.row { display: flex; flex-wrap: wrap; gap: var(--row-gap); }
+.row { display: flex; flex-wrap: wrap; align-items: center; gap: var(--row-gap); }
 
 .cover {
   position: relative;
@@ -387,7 +424,7 @@ button { cursor: pointer; }
   overflow: hidden;
 }
 .cover img { width: 100%; height: 100%; object-fit: cover; }
-.cover .monogram { font-size: 30px; }
+.cover .monogram { font-size: 32px; }
 .is-dim .cover { background: var(--hatch-dim); filter: grayscale(1); opacity: .85; }
 
 .body {
@@ -395,6 +432,7 @@ button { cursor: pointer; }
   min-width: 0;
   display: flex;
   flex-direction: column;
+  justify-content: center;
   gap: 8px;
 }
 
@@ -403,7 +441,7 @@ button { cursor: pointer; }
   margin: 0;
   flex: 1;
   min-width: 0;
-  font: 400 19px/1.2 var(--font-display);
+  font: 400 21px/1.2 var(--font-display);
   color: var(--paper-dim);
 }
 /* Heat: crimson title over an ember hairline sized to the text, not the row. */
@@ -416,7 +454,9 @@ button { cursor: pointer; }
 }
 .is-dim .title { font-style: italic; color: var(--mute); }
 .is-dim .fav-mark { color: var(--mute-2); }
-.fav-mark { flex: none; width: 13px; height: 13px; margin-top: 5px; color: var(--brass); }
+/* The mark always sits at the right edge of the measure, not after the last
+   word — a new-chapter title shrink-wraps, so without this it drifts. */
+.fav-mark { flex: none; margin-left: auto; width: 14px; height: 14px; margin-top: 5px; color: var(--brass); }
 
 .meta {
   margin: 0;
@@ -424,7 +464,7 @@ button { cursor: pointer; }
   align-items: center;
   gap: 9px;
   flex-wrap: wrap;
-  font: 500 10px/1 var(--font-mono);
+  font: 500 11px/1 var(--font-mono);
   letter-spacing: .12em;
   text-transform: uppercase;
   color: var(--mute);
@@ -434,7 +474,7 @@ button { cursor: pointer; }
 .site-demonic { color: var(--demonic); }
 .new-chapter { color: var(--ember); }
 .state { display: flex; align-items: center; gap: 4px; color: var(--mute); }
-.state svg { width: 9px; height: 9px; }
+.state svg { width: 10px; height: 10px; }
 .is-dim .meta { color: var(--mute-2); }
 .is-dim .site-asura, .is-dim .site-demonic { color: var(--mute); filter: grayscale(.6); }
 
@@ -459,6 +499,12 @@ button { cursor: pointer; }
 .actions > *:last-child { border-right: none; }
 .actions svg { width: 17px; height: 17px; }
 .actions > *:hover { color: var(--paper); }
+/* Per-action accent on hover and press: gold favourite, slate archive, moss
+   finished, clay chapter. Remove keeps --danger, play keeps paper/ember. */
+.actions .fav:hover, .actions .fav:active, .actions .fav:focus-visible { color: var(--brass); }
+.actions .pencil:hover, .actions .pencil:active, .actions .pencil:focus-visible { color: var(--clay); }
+.actions .box:hover, .actions .box:active, .actions .box:focus-visible { color: var(--slate); }
+.actions .finish:hover, .actions .finish:active, .actions .finish:focus-visible { color: var(--moss); }
 .actions .play { color: var(--paper); }
 .is-new .actions .play { color: var(--ember); }
 .actions .play:hover { background: var(--hover); }
@@ -696,7 +742,7 @@ button { cursor: pointer; }
 
 /* ---- desktop: same measure, actions fold up beside the row ---- */
 @media (min-width: 720px) {
-  :root { --cover-w: 74px; --row-gap: 20px; }
+  :root { --cover-w: 80px; --row-gap: 20px; }
   .topbar { padding: 26px 32px 18px; }
   .brand { font-size: 30px; }
 
@@ -711,13 +757,25 @@ button { cursor: pointer; }
   .tabs a { padding: 10px 0 14px; font-size: 18px; }
   .searchbar { order: 2; flex: 1; margin: 0; border-bottom: none; }
   .recent h2, .recent-strip { padding-left: 32px; padding-right: 32px; }
-  .recent-card, .recent-cover { width: 100px; }
+  .keyrow {
-  .recent-cover { height: 133px; }
+    align-items: center;
+    justify-content: flex-start;
+    gap: 26px;
+    height: 36px;
+    padding: 0 32px;
+  }
+  .keyrow .pair { flex-direction: row; gap: 7px; }
+  .keyrow .pair svg { width: 14px; height: 14px; }
+  .keyrow .pair span { font-size: 11px; letter-spacing: .1em; }
+  .keyrow .full { display: inline; }
+    .recent-card, .recent-cover { width: var(--cover-w); }
+  .recent-cover { height: calc(var(--cover-w) * 4 / 3); }
+  .recent-title { font-size: 17px; }
 
   .card { padding: 18px 32px; }
   .row { flex-wrap: nowrap; align-items: center; }
-  .cover .monogram { font-size: 26px; }
+  .cover .monogram { font-size: 28px; }
-  .title { font-size: 21px; }
+  .title { font-size: 22px; }
 
   .actions { flex: none; gap: 4px; border-top: none; }
   .actions > * {
@@ -732,6 +790,10 @@ button { cursor: pointer; }
   .actions > *:not(.lifecycle) + .lifecycle { margin-left: 10px; box-shadow: none; }
   .is-new .actions .play { border-color: var(--play-hot-line); }
   .actions .on { border-color: var(--fav-line); }
+  /* The cell border follows the icon on hover, so the accent reads as a state
+     rather than a stray colour. */
+  .actions .fav:hover, .actions .pencil:hover,
+  .actions .box:hover, .actions .finish:hover { border-color: currentColor; }
 
   /* Panels line up with the body text, i.e. past the cover and its gap. */
   .chapter-form, .confirm-row, .error-inline {

backend/templates/app.html

@@ -61,6 +61,8 @@
   </nav>
   </div>
 
+  {{template "keyrow" .}}
+
   {{template "recent" .}}
 
   <main id="list" class="list">

backend/templates/chrome.html

@@ -1,9 +1,9 @@
-{{/* The two regions that live outside the swapped #list: the "Continue
+{{/* The regions that live outside the swapped #list: the "Continue reading"
-     reading" strip and the Updated badge. Both are rendered inline by app.html
+     strip, the Updated badge and the action key. All are rendered inline by
-     and again, out of band, on every /ui/ response — a mutation must not leave
+     app.html and again, out of band, on every /ui/ response — a mutation must
-     them describing the library as it was before the tap.
+     not leave them describing the library as it was before the tap.
 
-     Both always render, hidden when they have nothing to say, so an out-of-band
+     All always render, hidden when they have nothing to say, so an out-of-band
      swap always has an element with the right id to replace. */}}
 
 {{define "recent"}}
@@ -27,4 +27,25 @@
 </section>
 {{end}}
 
+{{/* The action key. The icon strip on a card is unlabelled, so one permanent
+     line under the tabs names every glyph. It follows the tab rather than the
+     row: the archived and finished buckets swap Archive for Restore, and a
+     finished series has no Done to offer. */}}
+{{define "keyrow"}}
+<div class="keyrow" id="keyrow" aria-label="Action key"{{if .OOB}} hx-swap-oob="true"{{end}}>
+  <span class="pair"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="#i-play"/></svg><span>Read</span></span>
+  <span class="pair brass"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="#i-star"/></svg><span>Fav</span></span>
+  <span class="pair"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="#i-pencil"/></svg><span>Chapter</span></span>
+  {{if or (eq .Tab "archived") (eq .Tab "finished")}}
+  <span class="pair"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="#i-undo"/></svg><span>Restore</span></span>
+  {{else}}
+  <span class="pair"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="#i-box"/></svg><span>Archive</span></span>
+  {{end}}
+  {{if ne .Tab "finished"}}
+  <span class="pair"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="#i-check"/></svg><span>Done</span></span>
+  {{end}}
+  <span class="pair trash"><svg viewBox="0 0 24 24" aria-hidden="true"><use href="#i-trash"/></svg><span>Delete</span></span>
+</div>
+{{end}}
+
 {{define "newcount"}}<span class="count" id="new-count"{{if .OOB}} hx-swap-oob="true"{{end}}{{if not .NewCount}} hidden{{end}}>{{.NewCount}}</span>{{end}}

backend/web.go

@@ -248,12 +248,14 @@ func currentTab(r *http.Request) string {
 	return u.Query().Get("tab")
 }
 
-// writeChromeOOB appends the two regions that live outside #list — the recent
+// writeChromeOOB appends the regions that live outside #list — the recent
-// strip and the Updated badge — as out-of-band swaps, so a mutation cannot
+// strip, the Updated badge and the action key — as out-of-band swaps, so a
-// leave them describing the library as it was before the tap.
+// mutation cannot leave them describing the library as it was before the tap.
+// The key is in here because it is tab-shaped too: archived and finished swap
+// Archive for Restore.
 func (h *webHandler) writeChromeOOB(w http.ResponseWriter, view listView) {
 	view.OOB = true
-	for _, name := range []string{"recent", "newcount"} {
+	for _, name := range []string{"recent", "newcount", "keyrow"} {
 		if err := h.tmpl.ExecuteTemplate(w, name, view); err != nil {
 			// The card is already written; stale chrome beats a torn response.
 			log.Printf("render %s oob: %v", name, err)