Work the design critique down: chapter format, colour law, search, strip, a11y (#11)

Two rounds of design-critique fixes on the web UI. Every visual change was verified at 390x844 and 1280x900 in both dark and light with screenshots; `go test ./...` is green throughout; no new dependencies.

## Earlier commits on this branch

The two oldest commits predate this session and were never opened as their own PR, so they are under review here too:

- Confirm-gate the lifecycle actions, cluster the action strip by consequence.
- Fix the accessibility findings from the audit: contrast, focus, reduced motion.

## The rest

**Chapter format.** The userscript and the poller both write `"Chapter N"`, and the templates prefixed `Ch ` again, so every real Asura row read `Ch Chapter 250` — while a manual edit stored a bare `250`, leaving two formats in one list. `DisplayChapter`/`DisplayLatest` on `Bookmark` now strip the lead-in and re-add exactly one `Ch `.

**Zero-result search.** The client filter only toggled `card.hidden`, so a query matching nothing left a blank list under a fully populated, unfiltered "Continue reading" strip. There is now a no-match state with a Clear-search button, and the strip goes down while a filter is active.

**The colour law.** `--ember` is documented as meaning "new chapter" and was spent on eight things, including setting "Nothing new." in the colour reserved for new chapters. Destruction moves to a new `--danger` token; text-input focus follows the searchbar idiom and turns `--paper`. Contrast, both themes: `--danger` on the page 4.82 / 6.65, the solid Remove button 4.94 / 7.30, the confirm question 9.00 / 7.98.

**The remove confirm.** Buttons 40px 8px apart became 46px 12px apart, and the question names the series and the loss instead of asking "Remove this?". It opens with **Cancel** focused, not Remove — the two reversible rows still open on their affirmative.

**The recent strip.** It was the head of the same `updated_at DESC` list rendered directly below it, on every tab, costing ~240px of the first phone screen. It is now scoped to series with a chapter waiting, and only on All. With nothing new anywhere it does not render — deliberate.

**Stale chrome.** The strip and the Updated badge describe the whole library but live outside the swapped `#list`, so archiving a series left it under "Continue reading" with the badge still counting it, and `/?tab=all` reached by htmx differed from the same URL reloaded. Both regions move into `chrome.html` and refresh out of band on every mutation and every tab switch.

**Accessibility and touch.** Esc closes any open panel and returns focus to the cell that owns it; opening a confirm moves focus into it; the inline error scrolls into view and no longer self-destructs after 5s; every tab and desktop action cell clears 44px; `role="alert"` on the login error; the card monogram is no longer announced; the busy bar is clipped by its own travel rather than by `overflow: hidden` on the card.

**Chapter form label.** The panel's only visible text named the published chapter while the field held your progress. The field gets a real label; "Latest known" moves below it.

**gzip.** Nothing was compressed. A stdlib middleware handles the four text types and leaves woff2 alone: style.css 21.8 -> 6.5 KB, htmx 50.9 -> 16.4, filter.js 7.6 -> 2.9.

## Not addressed

The `role="status"` error slot is still mutated while hidden and then revealed, which is the non-announcing pattern the confirm rows were fixed for. Delete is still a silent vanish. Both are flagged in the critique snapshot under `.impeccable/critique/`.

Design health went 24/36 (66.7%) to 29/40 (72.5%) between snapshots; the two P1s that survived were found and fixed after that run.

Reviewed-on: #11
Co-authored-by: Sulthan Zaki <sultankiki05@gmail.com>
Co-committed-by: Sulthan Zaki <sultankiki05@gmail.com>

backend/templates/app.html

@@ -8,7 +8,9 @@
   <title>mangaBookmark</title>
   <link rel="stylesheet" href="/static/style.css">
   <link rel="preload" href="/static/fonts/instrument-serif-400-latin.woff2" as="font" type="font/woff2" crossorigin>
-  <link rel="preload" href="/static/fonts/ibm-plex-mono-500-latin.woff2" as="font" type="font/woff2" crossorigin>
+  {{/* Body text before meta lines: DM Sans is the biggest face and the one
+       most of the page is set in; the mono is small and arrives from CSS. */}}
+  <link rel="preload" href="/static/fonts/dm-sans-var-latin.woff2" as="font" type="font/woff2" crossorigin>
   <script src="/static/htmx.min.js" defer></script>
   <script src="/static/filter.js" defer></script>
 </head>
@@ -31,46 +33,35 @@
            autocomplete="off" aria-label="Search titles">
   </div>
 
-  <nav class="tabs" role="tablist">
-    <a role="tab" href="/?tab=all" class="{{if eq .Tab "all"}}active{{end}}"
+  {{/* These are real links with real hrefs that change the URL, so they are
+       navigation, not an ARIA tablist — aria-current carries "which bucket am
+       I in" without owing a tabpanel contract we do not implement. */}}
+  <nav class="tabs" aria-label="Bookmark buckets">
+    <a href="/?tab=all" class="{{if eq .Tab "all"}}active{{end}}"
+       {{if eq .Tab "all"}}aria-current="page"{{end}}
        hx-get="/ui/list?tab=all" hx-target="#list" hx-swap="innerHTML"
        hx-push-url="/?tab=all" hx-on::after-request="setActiveTab(this)">All</a>
-    <a role="tab" href="/?tab=new" class="tab-new {{if eq .Tab "new"}}active{{end}}"
+    <a href="/?tab=new" class="tab-new {{if eq .Tab "new"}}active{{end}}"
+       {{if eq .Tab "new"}}aria-current="page"{{end}}
        hx-get="/ui/list?tab=new" hx-target="#list" hx-swap="innerHTML"
-       hx-push-url="/?tab=new" hx-on::after-request="setActiveTab(this)">Updated{{if .NewCount}}
-      <span class="count">{{.NewCount}}</span>{{end}}</a>
-    <a role="tab" href="/?tab=fav" class="{{if eq .Tab "fav"}}active{{end}}"
+       hx-push-url="/?tab=new" hx-on::after-request="setActiveTab(this)">Updated
+      {{template "newcount" .}}</a>
+    <a href="/?tab=fav" class="{{if eq .Tab "fav"}}active{{end}}"
+       {{if eq .Tab "fav"}}aria-current="page"{{end}}
        hx-get="/ui/list?tab=fav" hx-target="#list" hx-swap="innerHTML"
        hx-push-url="/?tab=fav" hx-on::after-request="setActiveTab(this)">Favourites</a>
-    <a role="tab" href="/?tab=archived" class="{{if eq .Tab "archived"}}active{{end}}"
+    <a href="/?tab=archived" class="{{if eq .Tab "archived"}}active{{end}}"
+       {{if eq .Tab "archived"}}aria-current="page"{{end}}
        hx-get="/ui/list?tab=archived" hx-target="#list" hx-swap="innerHTML"
        hx-push-url="/?tab=archived" hx-on::after-request="setActiveTab(this)">Archived</a>
-    <a role="tab" href="/?tab=finished" class="{{if eq .Tab "finished"}}active{{end}}"
+    <a href="/?tab=finished" class="{{if eq .Tab "finished"}}active{{end}}"
+       {{if eq .Tab "finished"}}aria-current="page"{{end}}
        hx-get="/ui/list?tab=finished" hx-target="#list" hx-swap="innerHTML"
        hx-push-url="/?tab=finished" hx-on::after-request="setActiveTab(this)">Finished</a>
   </nav>
   </div>
 
-  {{if .Recent}}
-  <section class="recent">
-    <h2>Continue reading</h2>
-    <div class="recent-strip">
-      {{range .Recent}}
-      <a class="recent-card {{if .HasNewChapter}}is-new{{end}}" href="{{.ContinueURL}}"
-         target="_blank" rel="noopener noreferrer">
-        <span class="recent-cover">
-          {{if .Cover}}<img src="{{.Cover}}" alt="" loading="lazy">
-          {{else}}<span class="monogram" aria-hidden="true">{{.Initial}}</span>{{end}}
-          {{if .HasNewChapter}}<span class="foot-rule"></span>
-          {{else if .Favorite}}<span class="foot-rule brass"></span>{{end}}
-        </span>
-        <span class="recent-title">{{.Title}}</span>
-        <span class="recent-chapter">Ch {{.LastChapter}}{{if .HasNewChapter}} · New{{end}}</span>
-      </a>
-      {{end}}
-    </div>
-  </section>
-  {{end}}
+  {{template "recent" .}}
 
   <main id="list" class="list">
     {{template "list" .}}