refactor(frontend): unify CsvAnalysis state under buckets[]

frontend/src/components/CsvAnalysis.jsx

@@ -6,7 +6,12 @@ import RunSequenceView from './RunSequenceView';
 
 // ── Constants ──────────────────────────────────────────────────────────────────
 
-const DEFAULT_CATEGORIES = ['Success', 'Failure', 'Other'];
+const DEFAULT_BUCKETS = [
+  { name: 'Success', type: 'note', notes: [] },
+  { name: 'Failure', type: 'note', notes: [] },
+  { name: 'Other',   type: 'note', notes: [] },
+];
+const DEFAULT_BUCKET_NAMES = new Set(DEFAULT_BUCKETS.map((b) => b.name));
 
 const CATEGORY_COLORS = {
   Success: { bg: 'bg-green-100', border: 'border-green-300', text: 'text-green-800', dot: 'bg-green-500' },
@@ -106,15 +111,22 @@ export default function CsvAnalysis({ dailyStatusId, onSaved, onSummaryPushed })
   // Classify phase
   const [rows, setRows] = useState([]);
   const [uniqueNotes, setUniqueNotes] = useState([]);
-  const [categories, setCategories] = useState(DEFAULT_CATEGORIES);
-  const [customCategories, setCustomCategories] = useState([]);
-  const [classifications, setClassifications] = useState({});
+  const [buckets, setBuckets] = useState(DEFAULT_BUCKETS);
   const [selectedNote, setSelectedNote] = useState(null);
   const [draggedNote, setDraggedNote] = useState(null);
   const [overBucket, setOverBucket] = useState(null);
   const [newCatName, setNewCatName] = useState('');
   const [showNewCat, setShowNewCat] = useState(false);
 
+  // Derived from buckets (recomputed every render — cheap)
+  const categories       = buckets.map((b) => b.name);
+  const customCategories = buckets.filter((b) => !DEFAULT_BUCKET_NAMES.has(b.name)).map((b) => b.name);
+  const noteBuckets      = buckets.filter((b) => b.type === 'note');
+  const numericalBuckets = buckets.filter((b) => b.type === 'numerical');
+  const classifications  = Object.fromEntries(
+    noteBuckets.flatMap((b) => b.notes.map((n) => [n, b.name]))
+  );
+
   // Results phase
   const [results, setResults] = useState(null);
   const [savedAnalysisId, setSavedAnalysisId] = useState(null);
@@ -166,7 +178,7 @@ export default function CsvAnalysis({ dailyStatusId, onSaved, onSummaryPushed })
       const uniq = getUniqueNoteValues(parsed, noteCol);
       setRows(parsed);
       setUniqueNotes(uniq);
-      setClassifications({});
+      setBuckets((prev) => prev.map((b) => ({ ...b, notes: [] })));
       setSelectedNote(null);
       if (frameCol) setFrameCheck(checkFrameConsecutive(parsed, frameCol));
       setParsePending(false);
@@ -177,19 +189,31 @@ export default function CsvAnalysis({ dailyStatusId, onSaved, onSummaryPushed })
   // ── Classification helpers ───────────────────────────────────────────────────
 
   function assign(note, category) {
-    setClassifications(prev => ({ ...prev, [note]: category }));
+    setBuckets((prev) => prev.map((b) => {
+      if (b.name === category) {
+        return b.notes.includes(note) ? b : { ...b, notes: [...b.notes, note] };
+      }
+      // Remove from any other bucket so a note belongs to at most one
+      return b.notes.includes(note) ? { ...b, notes: b.notes.filter((n) => n !== note) } : b;
+    }));
     setSelectedNote(null);
   }
 
   function unassign(note) {
-    setClassifications(prev => { const n = { ...prev }; delete n[note]; return n; });
+    setBuckets((prev) => prev.map((b) =>
+      b.notes.includes(note) ? { ...b, notes: b.notes.filter((n) => n !== note) } : b
+    ));
   }
 
+  function addBucket(name, type) {
+    const trimmed = name.trim();
+    if (!trimmed || buckets.some((b) => b.name === trimmed)) return;
+    setBuckets((prev) => [...prev, { name: trimmed, type, notes: [] }]);
+  }
+
+  // Back-compat shim so the existing "+ New category" UI keeps working until Task 9 swaps the picker
   function addCategory() {
-    const name = newCatName.trim();
-    if (!name || categories.includes(name)) return;
-    setCategories(prev => [...prev, name]);
-    setCustomCategories(prev => [...prev, name]);
+    addBucket(newCatName, 'note');
     setNewCatName('');
     setShowNewCat(false);
   }
@@ -266,13 +290,11 @@ export default function CsvAnalysis({ dailyStatusId, onSaved, onSummaryPushed })
     setHeaders([]);
     setRows([]);
     setUniqueNotes([]);
-    setClassifications({});
+    setBuckets(DEFAULT_BUCKETS);
     setResults(null);
     setSavedAnalysisId(null);
     setSummaryPushed(false);
     setSummaryError(null);
-    setCategories(DEFAULT_CATEGORIES);
-    setCustomCategories([]);
     setFrameCheck(null);
   }
 
@@ -408,18 +430,17 @@ export default function CsvAnalysis({ dailyStatusId, onSaved, onSummaryPushed })
 
           {/* Category buckets */}
           <div className="grid grid-cols-3 gap-3">
-            {categories.map(cat => {
-              const colors = getCategoryColors(cat, customCategories);
-              const notesInCat = uniqueNotes.filter(n => classifications[n] === cat);
+            {buckets.map((b) => {
+              const colors = getCategoryColors(b.name, customCategories);
               return (
-                <CategoryBucket key={cat} name={cat} notes={notesInCat} colors={colors}
-                  isOver={overBucket === cat}
-                  onDragOver={() => setOverBucket(cat)}
+                <CategoryBucket key={b.name} name={b.name} notes={b.notes} colors={colors}
+                  isOver={overBucket === b.name}
+                  onDragOver={() => setOverBucket(b.name)}
                   onDragLeave={() => setOverBucket(null)}
                   onDrop={() => {
-                    if (draggedNote) { assign(draggedNote, cat); setDraggedNote(null); setOverBucket(null); }
+                    if (draggedNote) { assign(draggedNote, b.name); setDraggedNote(null); setOverBucket(null); }
                   }}
-                  onClickAssign={() => { if (selectedNote) assign(selectedNote, cat); }}
+                  onClickAssign={() => { if (selectedNote) assign(selectedNote, b.name); }}
                   onRemoveNote={(note) => unassign(note)}
                 />
               );