Admin polish: section fallback, live-scoped coverage, dual source status

Per Codex audit:
* Unknown ?section= values now clamp to Overview, so the page never renders the
  tabs with an empty body.
* Summary/image coverage counts join through articles+scores and require
  accepted=1 AND duplicate_of IS NULL, so percentages stay ≤100% and honest as
  rejected/duplicate rows accrue summaries over time.
* A source that's both resting and flagged now shows "⚠ resting · review"
  rather than hiding the review flag behind the resting state.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend/src/routes/admin/+page.svelte

@@ -30,7 +30,11 @@
     { key: 'audience', label: 'Audience' },
     { key: 'feedback', label: 'Feedback' },
   ];
-  let section = $derived($page.url.searchParams.get('section') || 'overview');
+  const VALID_SECTIONS = new Set(TABS.map((t) => t.key));
+  // Unknown ?section= values fall back to Overview so the page never renders blank.
+  let section = $derived(
+    VALID_SECTIONS.has($page.url.searchParams.get('section')) ? $page.url.searchParams.get('section') : 'overview'
+  );
 
   function fdate(s) {
     try { return new Date(s + 'Z').toLocaleDateString(undefined, { month: 'short', day: 'numeric' }); }
@@ -208,7 +212,7 @@
                 <td class="dim">{fwhen(s.next_due_at)}</td>
                 <td class="num">{s.failures || ''}</td>
                 <td class="status">
-                  {#if s.failures > 0}<span class="bad" title={s.last_error || ''}>⚠ resting</span>
+                  {#if s.failures > 0}<span class="bad" title={s.last_error || ''}>⚠ resting{#if s.review_flag} · review{/if}</span>
                   {:else if s.review_flag}<span class="flagtxt">⚑ review</span>
                   {:else}<span class="good">✓ ok</span>{/if}
                 </td>

goodnews/queries.py

@@ -237,10 +237,16 @@ def content_stats(conn: sqlite3.Connection) -> dict:
         "SELECT COUNT(*) FROM article_scores s JOIN articles a ON a.id=s.article_id "
         "WHERE s.accepted=1 AND a.duplicate_of IS NULL AND a.image_url IS NOT NULL AND a.image_url!=''"
     )
-    summaries = scalar("SELECT COUNT(*) FROM article_summaries")
+    # Coverage is scoped to LIVE articles (accepted, non-duplicate) so the
+    # percentages can't drift past 100% as rejected/duplicate rows accrue summaries.
+    summaries = scalar(
+        "SELECT COUNT(*) FROM article_summaries m JOIN articles a ON a.id=m.article_id "
+        "JOIN article_scores s ON s.article_id=a.id WHERE s.accepted=1 AND a.duplicate_of IS NULL"
+    )
     summaries_with_image = scalar(
         "SELECT COUNT(*) FROM article_summaries m JOIN articles a ON a.id=m.article_id "
-        "WHERE a.image_url IS NOT NULL AND a.image_url!=''"
+        "JOIN article_scores s ON s.article_id=a.id WHERE s.accepted=1 AND a.duplicate_of IS NULL "
+        "AND a.image_url IS NOT NULL AND a.image_url!=''"
     )
     brief_with_image = 0
     if brief: