Spec #136: Finished belongs to the Series — owner-owned poll gate, Lifecycle bucket dropped (#163)

Closes #136.

Spec #136 end to end: `finished` becomes a fact about the Series, written only by the owner, and the reader-facing Lifecycle bucket is gone.

## What landed

- **#157** — `series.finished_at bigint NOT NULL DEFAULT 0` plus the migration whose statement order is load-bearing (seed from the buckets, then flip them); both Lane queries lose the `HAVING COUNT(*) FILTER (WHERE b.status <> 'finished')` clause and gate on `finished_at = 0` instead, with the due-query/eligible-count force asymmetry kept deliberate and commented; `StatusFinished`, its API special-case 400, the web tab and the templates' Finished bucket deleted.
- **#158** — owner Finish control on the Series detail page: confirm-gated finish, instant un-finish, admin accent (never ember, nothing is destroyed), `Store.SetSeriesFinished`, the two routes behind the owner gate, and the state displayed on the list row without offering the control there.
- **#160** — reader side: derived `finished` bool on the flat Bookmark (`s.finished_at > 0`), rendered as a text-only label in both userscripts and on the web card; read-only inbound by omission from `Upsert`'s explicit `series` column list, same mechanism that already protects `cover`.
- **#161** — glossary and the stale Reader-count divergence note catch up.
- **#159** — `finished` joins the admin filter vocabulary (predicate `finished_at > 0`, label `Finished`, own aggregate count, figure last in the stats block as informational); the four clock-driven hygiene predicates (stale, never-checked, no-cover, no-chapter) exclude finished Series while unpollable, orphan and sighting-raised deliberately do not.

## Verification

`go vet ./...` and `go test ./...` green on the merged branch (Docker-backed, throwaway `postgres:17-alpine` per package). Each ticket also passed a two-axis review (spec + standards) on its own branch before merge.

Reviewed-on: #163
Co-authored-by: Sulthan Zaki <sultankiki05@gmail.com>
Co-committed-by: Sulthan Zaki <sultankiki05@gmail.com>

backend/internal/web/static/admin.css

@@ -653,6 +653,22 @@
   margin-left: auto;
 }
 
+/* The finish confirm is the one calm row on the admin sheet: a reversible
+   move wears the recessed ash, never the remove wash above, and its
+   affirmative takes the sheet's patina accent (issue #158). */
+.admin-sheet .confirm-row.calm {
+  background: var(--ash);
+}
+
+.admin-sheet .confirm-row.calm span {
+  color: var(--paper-dim);
+}
+
+.admin-sheet .confirm-row.calm .go {
+  background: var(--patina);
+  color: var(--ink);
+}
+
 .admin-sheet .tbl.series .row-msg {
   grid-column: 1 / -1;
   margin-top: 6px;

backend/internal/web/static/filter.js

@@ -61,7 +61,7 @@ function setActiveTab(el) {
   document.dispatchEvent(new Event("bmgr:refilter"));
 }
 
-// The chapter-edit form and the archive/finish/remove confirm rows are the
+// The chapter-edit form and the archive/remove confirm rows are the
 // per-card disclosure panels; only one makes sense open at a time. The button
 // that owns an open panel carries .open, which is how the strip shows which
 // cell the panel belongs to.
@@ -97,10 +97,10 @@ function toggleChapterForm(key) {
   if (form && !form.hidden) form.querySelector("input").focus();
 }
 
-// kind is "archive" | "finish" | "remove" — the panel id and the owning action
+// kind is "archive" | "remove" — the panel id and the owning action
 // cell share it.
 function toggleConfirmRow(key, kind) {
-  var cls = { archive: ".box", finish: ".finish", remove: ".remove" }[kind];
+  var cls = { archive: ".box", remove: ".remove" }[kind];
   var row = togglePanel(key, "confirm-" + kind + "-" + key, ".actions " + cls);
   // Focus the answer rather than trusting aria-live on a container that merely
   // unhides: it makes the announcement deterministic, keeps tab order inside

backend/internal/web/static/style.css

@@ -54,7 +54,7 @@
 
   --ink: #100f0e;          /* page */
   --ash: #161413;          /* recessed panel (chapter form) */
-  --dim: #0d0c0b;          /* archived / finished rows sink */
+  --dim: #0d0c0b;          /* archived rows sink */
   --rule: #221f1d;         /* hairline between sheets */
   --rule-soft: #1a1817;    /* measure edges */
   --field-line: #2c2926;
@@ -550,6 +550,7 @@ button { cursor: pointer; }
 .new-chapter { color: var(--ember); }
 .state { display: flex; align-items: center; gap: 4px; color: var(--mute); }
 .state svg { width: 10px; height: 10px; }
+.state.finished { color: var(--moss); }
 .is-dim .meta { color: var(--mute-2); }
 .is-dim .site-asura, .is-dim .site-demonic,
 .is-dim .site-comix, .is-dim .site-kagane,
@@ -612,13 +613,13 @@ 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. */
+/* Per-action accent on hover and press: gold favourite, slate archive, 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); }
 .actions .on { color: var(--brass); }
@@ -632,8 +633,8 @@ button { cursor: pointer; }
 .actions .remove.open { background: var(--danger-wash); color: var(--danger); }
 .is-dim .actions > * { color: var(--mute-2); }
 
-/* Three clusters by consequence: navigate (play) | organize (favourite,
-   chapter) | lifecycle (archive/restore, finish, remove). The lifecycle cells
+/* Two clusters by consequence: navigate (play) | organize (favourite,
+   chapter) | lifecycle (archive/restore, remove). The lifecycle cells
    sit on a recessed ground so the thumb reads "this one moves the series"
    before it reads which icon it landed on. */
 .actions > .lifecycle { background: var(--ash); }
@@ -712,7 +713,7 @@ button { cursor: pointer; }
   color: var(--danger-ink);
   font-weight: 600;
 }
-/* Archive and finish are reversible, so their confirm asks in grey — only the
+/* Archive is reversible, so its confirm asks in grey — only the
    irreversible remove gets the danger wash. */
 .confirm-row.calm { background: var(--ash); }
 .confirm-row.calm span { color: var(--paper-dim); }
@@ -917,9 +918,7 @@ button { cursor: pointer; }
   /* 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. */
+  .actions .box:hover { border-color: currentColor; }
   .chapter-form, .confirm-row, .error-inline {
     margin-left: calc(var(--cover-w) + var(--row-gap));
   }