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app.py

@@ -270,7 +270,9 @@ def merge_boards(boards: list) -> dict:
         metric_columns.append({"field": b["id"], "label": _factor_label(b),
                                "unit": km.get("unit", ""),
                                "direction": km.get("direction", "desc"),
-                               "description": (b.get("description") or "").strip()})
+                               "description": (b.get("description") or "").strip(),
+                               # a note on the board itself footnotes the header
+                               "note": (b.get("note") or "").strip()})
 
     by_model: dict = {}
     order: list = []
@@ -468,9 +470,10 @@ TABLE_CSS = """
 /* a marker after a pill hangs beside it out of flow (absolute, no offsets =
    static position), so starred pills stay centered in line with the column */
 .ttslb .pill + .notemark { position:absolute; margin-left:3px; }
-/* provider-level markers ride superscript after the model name (.notemark is
-   already position:relative for its tooltip, so a top offset lifts it) */
-.ttslb td.prov .notemark { margin-left:2px; font-size:9.5px; top:-0.45em; }
+/* provider-level and column-header markers ride superscript after their label
+   (.notemark is already position:relative for its tooltip, so a top offset
+   lifts it) */
+.ttslb td.prov .notemark, .ttslb th .notemark { margin-left:2px; font-size:9.5px; top:-0.45em; }
 .ttslb .footnotes { margin-top:10px; color:var(--lb-ink-2); font-size:12.5px; line-height:1.7; text-align:left; }
 /* the symbol leading each footnote line gets a slight bump so a lone "*" reads */
 .ttslb .footnotes .notemark { font-size:1.15em; margin-right:2px; }
@@ -890,12 +893,18 @@ def render_board_html(board: dict, lic: str = "all", fname: str = "board") -> st
         ranked, unranked = list(parts), []
 
     # Footnote markers: one symbol per distinct note among the visible cells — a
+    # column-level note marks the header (a caveat about the whole metric, shown
+    # without a hover since the header already carries the ⓘ description tip), a
     # provider-level note marks the model name (a caveat about the model itself),
     # a note on an empty cell explains the gap, and a note on a valued cell flags
     # a caveat (e.g. r reported as 0 where zero variance left it undefined).
-    # Provider notes are collected first so the leftmost column's symbols lead.
+    # Collection order tracks visual position: headers, then rows, then cells.
     _MARKS = ("*", "††", "‡‡", "§§", "‖‖", "¶¶")
     marker_of = {}
+    for c in value_cols:
+        note = c.get("note")
+        if note and note not in marker_of:
+            marker_of[note] = _MARKS[len(marker_of) % len(_MARKS)]
     for p in parts:
         note = p.get("note")
         if note and note not in marker_of:
@@ -922,9 +931,11 @@ def render_board_html(board: dict, lic: str = "all", fname: str = "board") -> st
         tip = (c.get("description") or "").strip()
         info = (f"<span class='info' data-tip=\"{html.escape(tip, quote=True)}\">ⓘ</span>"
                 if tip else "")
+        hmark = marker_of.get(c.get("note"))
+        hmarker = f"<span class='notemark'>{hmark}</span>" if hmark else ""
         ths.append(
             f"<th class='num' data-ci='{3 + j}' data-num='1' data-desc='{'1' if d == 'desc' else '0'}'{init}>"
-            f"{html.escape(c['label'])}<span class='arr'>{arrow}</span>{info}</th>"
+            f"{html.escape(c['label'])}{hmarker}<span class='arr'>{arrow}</span>{info}</th>"
         )
     header = "".join(ths)
 
@@ -1073,7 +1084,9 @@ def render_samples_section(samples: list, factor_labels: dict,
                 if s.get("scenario"):
                     rows_html.append(f"<div class='smp-gnote'><strong>Scenario:"
                                      f"</strong> {html.escape(s['scenario'])}</div>")
-                else:
+                elif group != f_label:
+                    # a bucket named exactly like its tab would just repeat the
+                    # tab label — skip the subheading, keep the grouped rows
                     n = sum(1 for r in rows if (r.get("group") or "").strip() == group)
                     rows_html.append(f"<div class='smp-group'>{html.escape(group)} "
                                      f"<span class='smp-n'>({n})</span></div>")