Latest Chapter correction: one numeric input, owner-gated (#149)

backend/internal/web/templates/series-detail.html

@@ -1,8 +1,9 @@
 {{/* Per-Series page: one address per Series, keyed "<site>:<series_id>" so the
      list row is one hop from it. Everything here is a Series-level fact plus
      the anonymous Reader count. The Check now control lands in its own .dform
-     below the (empty) .detail-grid; the pending marker rides the meta line
-     with the other marks. */}}
+     below the .detail-grid; the correction form is the grid's first column,
+     and the grid's second waits for the series-URL repair (#151). The pending
+     and corrected markers ride the meta line with the other marks. */}}
 {{define "series-detail"}}
 <a class="ghost detail-back" href="/admin/series">← Series</a>
 <h1 class="detail-title">{{.Title}}</h1>
@@ -10,7 +11,16 @@
 {{if .Cover}}<div class="cover"><img src="{{.Cover}}" alt="" loading="lazy"></div>
 {{else}}<div class="cover"></div>{{end}}
 {{template "series-detail-meta" .}}
-<div class="detail-grid"></div>
+<div class="detail-grid">
+  <form class="dform" hx-post="/admin/series/{{.Key}}/latest" hx-target="#detail-meta" hx-swap="outerHTML">
+    <h3>Correct latest chapter</h3>
+    <p class="hint">The next successful Poll overwrites this value.</p>
+    <div class="field">
+      <input type="number" name="chapter" step="any" placeholder="{{.Chapter}}" required>
+      <button type="submit" class="ghost">Set</button>
+    </div>
+  </form>
+</div>
 {{if .CanPoll}}
 <div class="dform">
   <div class="field"><a class="ghost act" hx-post="/admin/series/{{.Key}}/poll" hx-target="#detail-meta" hx-swap="outerHTML" href="#">Check now</a></div>
@@ -18,14 +28,15 @@
 {{end}}
 {{end}}
 
-{{/* series-detail-meta is the meta line, and the answer a Check now press on
-     the detail page swaps into its place: the same marks, re-rendered after
-     the stamp so the pending marker shows. */}}
+{{/* series-detail-meta is the meta line, and the answer a Check now or
+     correction press on the detail page swaps into its place: the same marks,
+     re-rendered after the stamp so the pending and corrected markers show. */}}
 {{define "series-detail-meta"}}
 <div class="detail-meta" id="detail-meta">
   <span>ch {{.Chapter}}</span>
   <span>checked {{.Checked}}</span>
   <span>{{.Readers}} readers</span>
+  {{if .Corrected}}<span class="mark">{{.Corrected}}</span>{{end}}
   {{if .Pending}}<span class="mark">{{.Requested}}</span>{{end}}
   {{if .Unpollable}}<span class="mark">unpollable</span>{{end}}
   {{if .NoCover}}<span class="mark">no cover</span>{{end}}