fix(web): drop back button from movie and series pages (#229)

The rail, browser back, and Esc already cover navigation — the back
button was a third way to do what two other things already do, and it
cost the page its first line.

- Remove #movie-back and #series-back buttons and their event listeners
- Focus lands on the title element (tabindex=-1) instead of the removed
  button on open
- TV releases back button is untouched
- Hero banner now meets the rail with zero top padding on movie/series
- Esc and parent-route behaviour unchanged
- Deep link fallback for TV releases uses #nav-library instead of the
  removed #series-back

web/index.html

@@ -218,10 +218,7 @@
     -->
 
     <main class="deck" id="movie" hidden aria-label="movie detail">
-      <header class="releases-head">
+      <p class="deck-status readout" id="movie-status" role="status" hidden></p>
-        <button type="button" class="control" id="movie-back">back</button>
-        <p class="deck-status readout" id="movie-status" role="status" hidden></p>
-      </header>
 
       <section class="module movie-hero" id="movie-hero" aria-label="title metadata">
         <div class="movie-body">
@@ -470,10 +467,7 @@
     -->
 
     <main class="deck releases" id="series" hidden aria-label="series detail">
-      <header class="releases-head">
+      <p class="deck-status readout" id="series-status" role="status" hidden></p>
-        <button type="button" class="control" id="series-back">back</button>
-        <p class="deck-status readout" id="series-status" role="status" hidden></p>
-      </header>
 
       <section class="module movie-hero" id="series-hero" aria-label="title metadata">
         <div class="movie-body">

web/src/main.ts

@@ -393,14 +393,14 @@ function main() {
           must<HTMLElement>("#library"),
           { kind: "library" },
         );
-        // no origin click to restore focus to on a deep link — the series
+        // no origin click to restore focus to on a deep link — the library
-        // view's back control is the closest stand-in
+        // rail button is the closest stand-in
         tvDeck.open({
           title,
           sub,
           seriesId,
           target,
-          origin: must<HTMLButtonElement>("#series-back"),
+          origin: must<HTMLElement>("#nav-library"),
           returnTo: must<HTMLElement>("#series"),
           parentRoute: { kind: "series", seriesId },
         });
@@ -1294,7 +1294,6 @@ function externalLink(label: string, href: string): HTMLAnchorElement {
 function movieMain(views: HideableView[]): MovieView {
   const view = must<HTMLElement>("#movie");
   const deckEl = must<HTMLElement>("#deck");
-  const back = must<HTMLButtonElement>("#movie-back");
   const statusEl = must<HTMLElement>("#movie-status");
   const hero = must<HTMLElement>("#movie-hero");
   const poster = must<HTMLImageElement>("#movie-poster");
@@ -1906,7 +1905,8 @@ function movieMain(views: HideableView[]): MovieView {
     filesSection.hidden = true;
     diskRows.replaceChildren();
     sweep.disabled = false;
-    back.focus();
+    titleEl.setAttribute("tabindex", "-1");
+    titleEl.focus();
     await load();
   }
 
@@ -1929,8 +1929,6 @@ function movieMain(views: HideableView[]): MovieView {
     target?.focus();
   }
 
-  back.addEventListener("click", close);
-
   // capture + stopImmediatePropagation: one Escape steps back one layer —
   // the library and search decks also listen for Escape on this window
   window.addEventListener(
@@ -3125,7 +3123,6 @@ const SERIES_REFRESH_WAIT_MS = 30_000;
 function seriesMain(tvDeck: TvReleasesView, views: HideableView[]): SeriesView {
   const view = must<HTMLElement>("#series");
   const deckEl = must<HTMLElement>("#deck");
-  const back = must<HTMLButtonElement>("#series-back");
   const hero = must<HTMLElement>("#series-hero");
   const poster = must<HTMLImageElement>("#series-poster");
   const titleEl = must<HTMLElement>("#series-title");
@@ -3793,7 +3790,8 @@ function seriesMain(tvDeck: TvReleasesView, views: HideableView[]): SeriesView {
     view.hidden = false;
     clearRemove();
     clearRichDetail();
-    back.focus();
+    titleEl.setAttribute("tabindex", "-1");
+    titleEl.focus();
     await load();
   }
 
@@ -3814,8 +3812,6 @@ function seriesMain(tvDeck: TvReleasesView, views: HideableView[]): SeriesView {
     origin?.focus();
   }
 
-  back.addEventListener("click", close);
-
   // capture, like every other layer: the tv deck's listener is registered
   // first, so one Esc steps back one layer
   window.addEventListener(

web/src/style.css

@@ -528,6 +528,12 @@ body {
   flex: 1;
 }
 
+/* movie and series: the hero banner meets the rail — no top padding (#229) */
+.deck#movie,
+.deck#series {
+  padding-top: 0;
+}
+
 .deck-status {
   margin: 0 0 var(--space-4);
   color: var(--ink-muted);