feat: one-click source links on catalyst feed headlines

Every LLM catalyst read's headline now links to the raw article
(raw_news_items.raw_url joined by headline), styled as a distinct dotted
underline per NN/g citation guidance — any AI verdict traces to its
source in one click. Rows without a matching raw item degrade to plain
text. Join verified against prod: 0.29s for the full feed query.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

api/static/dashboard.html

@@ -322,6 +322,10 @@
   .cf-nums { width: 40px; text-align: right; flex: none; color: var(--muted); font: 500 10px var(--mono); }
   .cf-text { flex: 1; min-width: 0; }
   .cf-head { color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+  /* one-click trace-back to the source article (NN/g: citations visible and
+     styled distinctly, next to the claim) */
+  .cf-link { color: inherit; text-decoration: underline dotted; text-decoration-color: var(--accent); text-underline-offset: 3px; }
+  .cf-link:hover { color: var(--accent); }
   .cf-why { color: var(--muted); font-style: italic; font-size: 10px; overflow: hidden;
     text-overflow: ellipsis; white-space: nowrap; }
   /* clickable engine chip + its filter indicator */
@@ -1281,7 +1285,9 @@ function renderCatalystFeed(feed) {
       + '<div class="cf-nums" title="sentiment ' + sentTxt + ' · conviction ' + conv.toFixed(2) + '">'
       +   '<span class="cf-conv">' + conv.toFixed(2) + '</span></div>'
       + '<div class="cf-text">'
-      +   '<div class="cf-head">' + esc(r.headline || '') + '</div>'
+      +   '<div class="cf-head">' + (r.url
+              ? '<a class="cf-link" href="' + esc(r.url) + '" target="_blank" rel="noopener">' + esc(r.headline || '') + ' ↗</a>'
+              : esc(r.headline || '')) + '</div>'
       +   (r.rationale ? '<div class="cf-why">“' + esc(r.rationale) + '”</div>' : '')
       + '</div>'
       + '</div>';

storage/projections.py

@@ -984,7 +984,12 @@ def query_catalyst_feed(store, limit: int = 40, lookback_hours: int = 24) -> lis
     try:
         rows = store.con.execute(
             "SELECT symbol, catalyst_type, sentiment, conviction, is_dilutive, "
-            "rationale, headline, source, model, enriched_at "
+            "rationale, headline, source, model, enriched_at, "
+            # source URL for one-click trace-back (cache stores no URL; the raw
+            # item that produced the headline does)
+            "(SELECT r.raw_url FROM raw_news_items r "
+            " WHERE r.raw_title = news_catalyst_cache.headline "
+            " AND r.raw_url IS NOT NULL LIMIT 1) AS url "
             "FROM news_catalyst_cache WHERE enriched_at >= ? "
             "ORDER BY enriched_at DESC LIMIT ?",
             [cutoff, int(limit)],
@@ -992,10 +997,11 @@ def query_catalyst_feed(store, limit: int = 40, lookback_hours: int = 24) -> lis
     except Exception:  # noqa: BLE001 — table may not exist / Ollama never ran
         return []
     out: list[dict] = []
-    for sym, ctype, sentiment, conv, is_dil, rationale, headline, source, model, ts in rows:
+    for sym, ctype, sentiment, conv, is_dil, rationale, headline, source, model, ts, url in rows:
         conv_f = float(conv) if conv is not None else None
         is_dil_b = bool(is_dil)
         out.append({
+            "url": url,
             "symbol": (sym or "").upper(),
             "catalyst_type": ctype,
             "sentiment": round(float(sentiment), 3) if sentiment is not None else None,