gmalbert · gmalbert · Oct 6, 2026 · Oct 6, 2026
diff --git a/fastapi_react/backend/app/services/reference_views.py b/fastapi_react/backend/app/services/reference_views.py
@@ -3124,7 +3124,13 @@ def _is_number(x):
                                         ui.image(str(mae_img), width=1000)
                             except Exception:
                                 pass
-                        ui.info('\n                        **Color scale**: darker/warmer colors indicate larger average absolute error.\n\n                        **Missing cells**: blank or neutral color means insufficient data (no races for that pair).\n\n                        **Sample size**: confidence intervals are empirical percentiles computed only when a group has at least 5 residuals.\n                    \n                        **Interpretation**: cells with darker colors indicate that the model has higher prediction errors for that driver/constructor at that circuit, suggesting potential areas for model improvement or unique performance characteristics.\n                        ')
+                        ui.info(
+                            '**How to read these heatmaps**\n\n'
+                            '- **Color:** Darker, warmer cells indicate higher average absolute error.\n'
+                            '- **Blank cells:** There were not enough races for that driver or constructor at that circuit.\n'
+                            '- **Sample size:** Each cell averages the available races; confidence intervals are shown only for groups with at least 5 residuals.\n'
+                            '- **Interpretation:** Treat higher-error cells as leads for further investigation. They can reflect model weaknesses or unusual race conditions.'
+                        )
                         for img_name, title in [('heatmap_driver_by_circuit.png', 'Driver x Circuit heatmap'), ('heatmap_constructor_by_circuit.png', 'Constructor x Circuit heatmap')]:
                             img_path = OUT_DIR / img_name
                             if img_path.exists():

diff --git a/fastapi_react/frontend/src/App.jsx b/fastapi_react/frontend/src/App.jsx
@@ -138,7 +138,6 @@ export default function App() {
     </div>
     {sidebar && <aside className="filter-sidebar" aria-label="Data filters"><div className="view-flow"><ViewNodes nodes={data?.sidebar} values={values} change={change} action={act} /></div></aside>}
     <div className="main-shell">
-      {FEATURES_ENABLED && <details><summary>Analysis tools</summary><FeatureBar page={page} values={values} options={options} setOptions={setOptions} restore={restore} navigate={navigate} busy={busy || Boolean(error) || data?.page !== page} analysisRevision={data?.page === page ? data.source_revision : null}/></details>}
       <header className="parity-header">
         <img src="/api/brand/logo" alt="Gridlocked" width="450" height="264" />
         {shell.length ? <div className="view-flow shell-copy"><ViewNodes nodes={shell} /></div> : <h1 className="shell-title">F1 Races from 2016 to {new Date().getFullYear()}</h1>}
@@ -154,6 +153,7 @@ export default function App() {
         {busy && !FEATURES_ENABLED && <span className="sr-only" role="status">Loading analysis…</span>}
         <footer className="parity-footer"><p>Powered by <a href="https://www.betting-oracle.com" target="_blank" rel="noreferrer">Betting Oracle</a></p><p>Sports Prediction Analytics</p><a href="https://www.betting-oracle.com" target="_blank" rel="noreferrer"><picture><source type="image/webp" srcSet="/betting-oracle-logo-60.webp 1x, /betting-oracle-logo-120.webp 2x"/><img src="/betting-oracle-logo.png" alt="Betting Oracle Logo" width="822" height="1255" style={{width: 60 * 822 / 1255}} loading="lazy" decoding="async" /></picture></a></footer>
       </main>
+      {FEATURES_ENABLED && <details className="analysis-tools"><summary>Analysis tools</summary><FeatureBar page={page} values={values} options={options} setOptions={setOptions} restore={restore} navigate={navigate} busy={busy || Boolean(error) || data?.page !== page} analysisRevision={data?.page === page ? data.source_revision : null}/></details>}
     </div>
   </div>;
 }
diff --git a/fastapi_react/frontend/src/components/Presentation.jsx b/fastapi_react/frontend/src/components/Presentation.jsx
@@ -222,7 +222,7 @@ export function ViewNodes({ nodes = [], values = {}, change = (_key, _value) =>
       case 'json': return <pre key={key} className="view-json">{JSON.stringify(node.value, null, 2)}</pre>;
       case 'notice':
         if (node.text === 'Research controls are disabled in hosted mode. Enable F1_RESEARCH_MODE=1 only for a trusted local/admin session; precomputed analyses remain available below.') return null;
-        return <div key={key} className={`view-notice ${node.severity}`} role={node.severity === 'error' ? 'alert' : 'status'}>{node.icon && <span>{node.icon}</span>}<Markdown>{node.text}</Markdown></div>;
+        return <div key={key} className={`view-notice ${node.severity}`} role={node.severity === 'error' ? 'alert' : 'status'}>{node.icon && <span>{node.icon}</span>}<div className="view-notice-content"><Markdown>{node.text}</Markdown></div></div>;
       case 'metric': return <div key={key} className="view-metric"><span>{node.label}</span><strong>{node.value}</strong>{node.delta != null && <small>{node.delta}</small>}</div>;
       case 'divider': return <hr key={key} className="view-divider" />;
       case 'image': return <img key={key} alt={node.alt || 'Analysis visualization'} src={node.src} className="view-image" style={{width: node.width === 'stretch' ? '100%' : node.width, maxWidth: '100%'}} />;

diff --git a/fastapi_react/frontend/src/components/ViewTable.jsx b/fastapi_react/frontend/src/components/ViewTable.jsx
@@ -5,6 +5,12 @@ import {displayCell} from './Presentation';
 import {useTheme} from './useTheme';
 
 const empty=[];
+const DEFAULT_COLUMN_WIDTH=150;
+const estimateColumnWidth=(column,index,rows)=>{
+  const longest=rows.reduce((max,row)=>Math.max(max,String(row[index]??'').length),String(column.label??'').length);
+  const minimum=column.kind==='NumberColumn'?72:96;
+  return Math.min(320,Math.max(minimum,Math.ceil(longest*6+24)));
+};
 const quote=value=>{const text=value==null?'':String(value);return /[,"\r\n]/.test(text)?`"${text.replaceAll('"','""')}"`:text;};
 function csvValue(value,column){
   if(value==null)return '';
@@ -32,6 +38,16 @@ export function ViewTable({node}) {
   const [pinned,setPinned]=useState([]);
   const [formats,setFormats]=useState(/** @type {Record<string,string>} */ ({}));
   const outer=useRef(null);
+  const [availableWidth,setAvailableWidth]=useState(0);
+  useEffect(()=>{
+    const parent=outer.current?.parentElement;
+    if(!parent)return;
+    const measure=()=>setAvailableWidth(parent.clientWidth);
+    measure();
+    const observer=new ResizeObserver(measure);
+    observer.observe(parent);
+    return()=>observer.disconnect();
+  },[]);
   useEffect(()=>{
     if(!menu && !showColumns)return;
     const close=event=>{if(event.type==='keydown' && event.key==='Escape' || event.type==='pointerdown' && !outer.current?.contains(event.target)){setMenu(null);setShowColumns(false);}};
@@ -50,10 +66,12 @@ export function ViewTable({node}) {
   },[rows,sort]);
   const visible=useMemo(()=>columns.map((column,index)=>({column,index})).filter(c=>!hidden.includes(c.index)).sort((a,b)=>Number(pinned.includes(b.index))-Number(pinned.includes(a.index))),[columns,hidden,pinned]);
   const gridColumns=useMemo(()=>{
-    const result=visible.map(({column,index})=>({id:String(index),title:column.label+(sort?.column===index?(sort.desc?' ↓':' ↑'):''),hasMenu:true,width:widths[index] || (typeof column.width==='number'?column.width:undefined)}));
-    if(!node.hide_index)result.unshift({id:'index',title:node.index_name || '',width:widths.index});
+    const result=visible.map(({column,index})=>({id:String(index),title:column.label+(sort?.column===index?(sort.desc?' ↓':' ↑'):''),hasMenu:true,width:widths[index] || Math.max(typeof column.width==='number'?column.width:0,estimateColumnWidth(column,index,rows))}));
+    if(!node.hide_index)result.unshift({id:'index',title:node.index_name || '',width:widths.index || 80});
     return result;
-  },[visible,widths,sort,node.hide_index,node.index_name]);
+  },[visible,widths,sort,node.hide_index,node.index_name,rows]);
+  const contentWidth=gridColumns.reduce((total,column)=>total+(widths[column.id] || column.width || DEFAULT_COLUMN_WIDTH),0);
+  const tableWidth=Math.min(contentWidth,availableWidth || Infinity,typeof node.width==='number'?node.width:Infinity);
   const dark=useTheme()==='dark';
   const bg=dark?'#0e1117':'#fff',text=dark?'#fafafa':'#31333f';
   /** @type {(cell: import('@glideapps/glide-data-grid').Item) => import('@glideapps/glide-data-grid').GridCell} */
@@ -86,7 +104,7 @@ export function ViewTable({node}) {
   const height=node.height || Math.min(400,(rows.length+1)*35+3);
   const menuColumn=menu?columns[menu.index]:null;
   const numeric=menuColumn?.kind==='NumberColumn';
-  return <div className="view-table canvas-table" ref={outer} style={{maxWidth:typeof node.width==='number'?node.width:undefined}}>
+  return <div className="view-table canvas-table" ref={outer} style={{width:tableWidth,maxWidth:'100%'}}>
     <div className="table-toolbar">
       <button aria-label="Search table" title="Search" onClick={()=>setShowSearch(s=>!s)}>⌕</button>
       <button aria-label="Show or hide columns" title="Columns" onClick={()=>setShowColumns(s=>!s)}>▥</button>
@@ -95,6 +113,6 @@ export function ViewTable({node}) {
     </div>
     {showColumns && <div className="column-picker">{columns.map((col,i)=><label key={i}><input type="checkbox" checked={!hidden.includes(i)} onChange={()=>setHidden(h=>h.includes(i)?h.filter(x=>x!==i):[...h,i])}/>{col.label}</label>)}</div>}
     {menuColumn && <div className="grid-column-menu" role="group" aria-label={`${menuColumn.label} column options`} style={{left:menu.left}}><strong>{menuColumn.label}</strong><button onClick={()=>{setSort({column:menu.index,desc:false});setMenu(null);}}>Sort ascending</button><button onClick={()=>{setSort({column:menu.index,desc:true});setMenu(null);}}>Sort descending</button><button onClick={()=>{setSort(null);setMenu(null);}}>Clear sorting</button><button onClick={()=>{setPinned(p=>p.includes(menu.index)?p.filter(i=>i!==menu.index):[...p,menu.index]);setMenu(null);}}>{pinned.includes(menu.index)?'Unpin column':'Pin column'}</button><button onClick={()=>{setHidden(h=>[...h,menu.index]);setMenu(null);}}>Hide column</button>{numeric && <label>Number format<select value={formats[menu.index] || ''} onChange={event=>setFormats(f=>({...f,[menu.index]:event.target.value}))}><option value="">Default</option><option value="%d">Integer</option>{[1,2,3,4].map(n=><option key={n} value={`%.${n}f`}>{n} decimal places</option>)}<option value="percent">Percent</option></select></label>}<small>{rows.length.toLocaleString()} rows · {rows.filter(r=>r[menu.index]==null).length.toLocaleString()} missing · {new Set(rows.map(r=>r[menu.index])).size.toLocaleString()} unique</small></div>}
-    <DataEditor columns={gridColumns} rows={rows.length} getCellContent={getCell} getCellsForSelection={true} width="100%" height={height} rowHeight={35} headerHeight={35} rowMarkers="none" minColumnWidth={50} maxColumnWidth={500} freezeColumns={pinned.length+(node.hide_index?0:1)} showSearch={showSearch} onSearchClose={()=>setShowSearch(false)} onHeaderMenuClick={(col,bounds)=>{const selected=visible[col-(node.hide_index?0:1)];if(selected)setMenu({index:selected.index,left:Math.max(0,Math.min(bounds.x-(outer.current?.getBoundingClientRect().x || 0),(outer.current?.clientWidth || 240)-240))});}} onColumnResize={(column,width)=>setWidths(old=>({...old,[column.id]:width}))} onColumnResizeEnd={(column,width)=>setWidths(old=>({...old,[column.id]:width}))} onHeaderClicked={col=>{const selected=visible[col-(node.hide_index?0:1)];if(selected)setSort(s=>s?.column===selected.index?(s.desc?null:{...s,desc:true}):{column:selected.index,desc:false});}} theme={{fontFamily:'Source Sans',baseFontStyle:'13px',headerFontStyle:'13px',cellHorizontalPadding:8,cellVerticalPadding:3,bgCell:bg,bgHeader:dark?'#262730':'#f7f9fc',bgHeaderHovered:dark?'#3a3d46':'#eff1f6',bgHeaderHasFocus:dark?'#3a3d46':'#eff1f6',textDark:text,textHeader:dark?'#bfc2ce':'#808495',textMedium:text,textLight:'#808495',borderColor:dark?'#3a3d46':'#e6e7eb',accentColor:'#ff4b4b',accentLight:dark?'#ff4b4b33':'#ff4b4b1a',accentFg:'#fff',headerBottomBorderColor:dark?'#3a3d46':'#d6d8df',roundingRadius:0}} />
+    <DataEditor columns={gridColumns} rows={rows.length} getCellContent={getCell} getCellsForSelection={true} width={tableWidth} height={height} rowHeight={35} headerHeight={35} rowMarkers="none" minColumnWidth={50} maxColumnWidth={500} freezeColumns={pinned.length+(node.hide_index?0:1)} showSearch={showSearch} onSearchClose={()=>setShowSearch(false)} onHeaderMenuClick={(col,bounds)=>{const selected=visible[col-(node.hide_index?0:1)];if(selected)setMenu({index:selected.index,left:Math.max(0,Math.min(bounds.x-(outer.current?.getBoundingClientRect().x || 0),(outer.current?.clientWidth || 240)-240))});}} onColumnResize={(column,width)=>setWidths(old=>({...old,[column.id]:width}))} onColumnResizeEnd={(column,width)=>setWidths(old=>({...old,[column.id]:width}))} onHeaderClicked={col=>{const selected=visible[col-(node.hide_index?0:1)];if(selected)setSort(s=>s?.column===selected.index?(s.desc?null:{...s,desc:true}):{column:selected.index,desc:false});}} theme={{fontFamily:'Source Sans',baseFontStyle:'13px',headerFontStyle:'13px',cellHorizontalPadding:8,cellVerticalPadding:3,bgCell:bg,bgHeader:dark?'#262730':'#f7f9fc',bgHeaderHovered:dark?'#3a3d46':'#eff1f6',bgHeaderHasFocus:dark?'#3a3d46':'#eff1f6',textDark:text,textHeader:dark?'#bfc2ce':'#555965',textMedium:text,textLight:'#808495',borderColor:dark?'#3a3d46':'#e6e7eb',accentColor:'#ff4b4b',accentLight:dark?'#ff4b4b33':'#ff4b4b1a',accentFg:'#fff',headerBottomBorderColor:dark?'#3a3d46':'#d6d8df',roundingRadius:0}} />
   </div>;
 }
diff --git a/fastapi_react/frontend/src/parity.css b/fastapi_react/frontend/src/parity.css
@@ -22,6 +22,8 @@ main:focus{outline:none}
 .shell-copy{margin-top:16px}
 .view-flow{display:flex;flex-direction:column;gap:16px;min-width:0}
 .view-flow:empty{display:none}
+.analysis-tools{margin-top:24px;padding-top:12px;border-top:1px solid var(--border)}
+.analysis-tools summary{cursor:pointer;color:var(--muted);font-size:14px;padding:6px 0}
 .view-heading{font-weight:600;letter-spacing:0;line-height:1.2;margin:0 0 -16px;padding:16px 0}
 h1.view-heading,.shell-title{font-size:44px;font-weight:700;padding:20px 0 16px;line-height:1.2}
 h2.view-heading{font-size:36px}
@@ -54,8 +56,12 @@ h3.view-heading{font-size:28px}
 .number-input button{width:32px;flex-shrink:0;padding:0!important;border:0!important;border-radius:0;font-size:22px;background:transparent!important}
 .number-input button:hover{background:#e4e6ec!important}
 .view-notice{display:flex;gap:16px;padding:16px;border-radius:8px;background:#e8f2fc;color:#17517d;font-size:16px;line-height:25.6px}
-.view-notice p{margin:0}
-.view-notice.info{background:#e8f2fc;color:#17517d}
+.view-notice-content{flex:1;min-width:0}
+.view-notice-content p{margin:0 0 8px}
+.view-notice-content p:last-child{margin-bottom:0}
+.view-notice-content ul,.view-notice-content ol{margin:4px 0 0;padding-left:22px}
+.view-notice-content li+li{margin-top:4px}
+.view-notice.info{align-items:flex-start;border:1px solid #c8ddf0;border-left:4px solid #5799ce;background:#f2f7fc;color:#17436a;padding:12px 16px}
 .view-notice.warning{background:#fff8e1;color:#715000}
 .view-notice.error{background:#ffeded;color:#922222}
 .view-notice.success{background:#e5f7ed;color:#17683b}
@@ -148,7 +154,7 @@ h3.view-heading{font-size:28px}
 .view-help{float:right;border:1px solid #808495;border-radius:50%;font-size:10px;font-weight:600;width:14px;height:14px;line-height:12px;text-align:center;margin-top:4px;color:#808495}.upload-file{padding:8px 16px;display:flex;justify-content:space-between}.upload-file button,.multiselect-box button{border:0;font-size:18px;line-height:1}.multiselect-field{position:relative}.multiselect-box{display:flex;flex-wrap:wrap;gap:8px;background:#f0f2f6;border-radius:8px;padding:8px 12px;min-height:40px}.select-tag{display:flex;align-items:center;gap:6px;background:#ff4b4b;color:white;padding:0 6px;border-radius:4px;font-size:14px;line-height:24px}.select-tag button{color:white}.multiselect-box input{min-width:40px;flex:1;width:40px;background:transparent;border:0;outline:none}.multiselect-options{position:absolute;top:100%;left:0;right:0;background:var(--page-bg);border:1px solid var(--border);box-shadow:0 4px 16px #0002;border-radius:8px;padding:8px;z-index:20;max-height:300px;overflow:auto}.multiselect-options button{display:block;width:100%;border:0;text-align:left;padding:8px;border-radius:4px}.multiselect-options button:hover{background:#f0f2f6}:root[data-theme=dark] .multiselect-box{background:#262730}
 
 .parity-nav,.tab-strip{position:relative}.tab-scroll{position:absolute!important;top:0!important;bottom:2px!important;width:20px!important;height:38px!important;z-index:4!important;border:0!important;background:var(--page-bg)!important;color:#808495!important;font-size:24px!important;line-height:38px!important;padding:0!important}.tab-scroll.left{left:0}.tab-scroll.right{right:0}.view-checkbox>span{font-size:14px;line-height:21px}.view-field>label,.view-field>span{display:flex;align-items:center;justify-content:space-between;min-height:24px}.view-help{margin-top:0}h3.view-heading{padding-top:12px}
-.view-caption{color:inherit;opacity:.6}.chart-shell{position:relative;min-width:0}.chart-shell:hover>.table-toolbar,.chart-shell:focus-within>.table-toolbar{opacity:1}.chart-shell>.table-toolbar{top:0}.chart-shell:fullscreen{padding:40px;background:var(--page-bg)}.chart-shell:fullscreen .view-chart{height:calc(100vh - 80px)}
+.view-caption{color:inherit}.chart-shell{position:relative;min-width:0}.chart-shell:hover>.table-toolbar,.chart-shell:focus-within>.table-toolbar{opacity:1}.chart-shell>.table-toolbar{top:0}.chart-shell:fullscreen{padding:40px;background:var(--page-bg)}.chart-shell:fullscreen .view-chart{height:calc(100vh - 80px)}
 .view-slider>label{position:relative;top:1px}.canvas-table .column-picker{top:30px}
 .grid-column-menu{position:absolute;top:35px;z-index:10;width:240px;padding:8px;border:1px solid var(--border);border-radius:8px;background:var(--page-bg);box-shadow:0 4px 16px #0002;font-size:14px;display:flex;flex-direction:column;gap:4px}.grid-column-menu>button{text-align:left;padding:8px;border:0;border-radius:4px;font-size:14px}.grid-column-menu>button:hover{background:#f0f2f6}.grid-column-menu strong,.grid-column-menu small{padding:4px 8px}.grid-column-menu label{display:flex;flex-direction:column;padding:8px;gap:4px}.grid-column-menu select{padding:6px;border:1px solid var(--border);border-radius:4px}
 .table-toolbar{pointer-events:none}.view-table:hover>.table-toolbar,.view-table:focus-within>.table-toolbar,.chart-shell:hover>.table-toolbar,.chart-shell:focus-within>.table-toolbar{pointer-events:auto}.chart-shell>.table-toolbar{z-index:6}

diff --git a/raceAnalysis.py b/raceAnalysis.py
@@ -6426,15 +6426,11 @@ def _is_number(x):
 
                     # Notes (render in a shaded info box)
                     st.info(
-                        """
-                        **Color scale**: darker/warmer colors indicate larger average absolute error.
-
-                        **Missing cells**: blank or neutral color means insufficient data (no races for that pair).
-
-                        **Sample size**: confidence intervals are empirical percentiles computed only when a group has at least 5 residuals.
-
-                        **Interpretation**: cells with darker colors indicate that the model has higher prediction errors for that driver/constructor at that circuit, suggesting potential areas for model improvement or unique performance characteristics.
-                        """
+                        "**How to read these heatmaps**\n\n"
+                        "- **Color:** Darker, warmer cells indicate higher average absolute error.\n"
+                        "- **Blank cells:** There were not enough races for that driver or constructor at that circuit.\n"
+                        "- **Sample size:** Each cell averages the available races; confidence intervals are shown only for groups with at least 5 residuals.\n"
+                        "- **Interpretation:** Treat higher-error cells as leads for further investigation. They can reflect model weaknesses or unusual race conditions."
                     )
 
                     # Heatmaps