[verified] Fix dashboard: real-data badge + sortable คะแนนรวม + modal calc steps

- badge now driven by /api/v1/dashboard availability (ข้อมูลจริงจากแหล่งไทย), not stale fixture summary (#request)
- factorValue handles 'combined' -> คะแนนรวม column now sorts + toggles asc/desc
- symbol modal shows full calculation: combined_formula, per-step calc (ธีม/พื้นฐาน + weights), z-score derivation with population mean/stdev/universe size
- panel-header layout fixes (full-width subtitle, header breathing room)
- Verified: badge real, sort 0.11->1.43, modal calc steps render

backend/app/themes.py

@@ -17,6 +17,7 @@ were the same timestamp — see `frequency` on each scored theme.
 
 from __future__ import annotations
 
+import statistics
 from dataclasses import dataclass
 from typing import Optional
 
@@ -200,8 +201,22 @@ def symbol_breakdown(
     d = fac.get("dividend_yield") or 0.0
     g = float(g) if g is not None else 0.0
     raw_siamchart = g + d * 2.0
-    # z-score against the full universe (same as build_siamchart_score)
-    siamchart_score = build_siamchart_score(factor_view).get(symbol, 0.0)
+
+    # z-score against the full universe (same as build_siamchart_score); capture
+    # the population stats so the view can show HOW -2.8 became -0.588.
+    siamchart_map = build_siamchart_score(factor_view)
+    siamchart_score = siamchart_map.get(symbol, 0.0)
+    # recompute the population of raw scores to expose mean / stdev
+    raw_values = []
+    for f in factor_view.get("factors", []):
+        if not f.get("symbol"):
+            continue
+        gg = f.get("eps_growth_yoy")
+        dd = f.get("dividend_yield") or 0.0
+        gg = float(gg) if gg is not None else 0.0
+        raw_values.append(gg + dd * 2.0)
+    pop_mean = statistics.mean(raw_values) if raw_values else 0.0
+    pop_stdev = statistics.pstdev(raw_values) if raw_values else 0.0
 
     combined = round(weight_theme * theme_score + weight_siamchart * siamchart_score, 3)
 
@@ -217,7 +232,22 @@ def symbol_breakdown(
             "dividend_yield": fac.get("dividend_yield"),
             "raw_growth_plus_yield_2x": round(raw_siamchart, 3),
         },
+        "siamchart_z_note": {
+            "formula": "z = (raw_i - mean) / stdev",
+            "raw_i": round(raw_siamchart, 3),
+            "population_mean": round(pop_mean, 3),
+            "population_stdev": round(pop_stdev, 3),
+            "universe_size": len(raw_values),
+        },
+        "combined_calc": [
+            {"label": "คะแนนธีม", "value": round(theme_score, 3), "weight": weight_theme,
+             "note": "ค่าเฉลี่ยของ theme surprise ที่หุ้นนี้อยู่ใน", "term": f"{theme_score:.3f} × {weight_theme}"},
+            {"label": "คะแนนพื้นฐาน", "value": round(siamchart_score, 3), "weight": weight_siamchart,
+             "note": f"z-score ของ ((EPS growth {g:+.1f}%) + ปันผล {d:.1f}%×2) เมื่อเทียบทั้ง universe",
+             "term": f"{siamchart_score:.3f} × {weight_siamchart}"},
+        ],
         "combined_score": combined,
+        "combined_formula": f"({theme_score:.3f} × {weight_theme}) + ({siamchart_score:.3f} × {weight_siamchart}) = {combined}",
         "weights": {"theme": weight_theme, "siamchart": weight_siamchart},
         "fundamentals": {
             "pe": fac.get("pe"),