Fix CSV restore: strip BOM and extract embedded ratings from drink rows

- Strip UTF-8 BOM that Excel/editors add to CSV files
- When drink rows contain score/notes/wouldReorder fields, automatically
  create rating entries (supports manually edited CSVs)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/lib/backup.ts

@@ -263,6 +263,23 @@ export function parseBackupRows(
           createdAt: parseOptionalDate(row.createdAt ?? ""),
           updatedAt: parseOptionalDate(row.updatedAt ?? ""),
         })
+        // Extract embedded rating data from drink rows (e.g. manually edited CSVs)
+        if (row.score && row.score.trim() !== "") {
+          const score = parseInt(row.score, 10)
+          if (score >= 1 && score <= 5) {
+            data.ratings.push({
+              _originalId: `${row._originalId ?? ""}_rating`,
+              _parentId: row._originalId ?? "",
+              _drinkName: row.name ?? "",
+              score,
+              notes: row.notes || undefined,
+              wouldReorder: parseBoolean(row.wouldReorder ?? "false"),
+              location: row.location || undefined,
+              createdAt: parseOptionalDate(row.createdAt ?? ""),
+              updatedAt: parseOptionalDate(row.updatedAt ?? ""),
+            })
+          }
+        }
         break
 
       case "rating":

src/lib/csv.ts

@@ -39,7 +39,9 @@ export function objectsToCsv(
  * Uses a state-machine parser to correctly handle quoted fields.
  */
 export function csvToObjects(csvText: string): Record<string, string>[] {
-  const rows = parseCsvRows(csvText)
+  // Strip UTF-8 BOM if present
+  const cleanText = csvText.charCodeAt(0) === 0xfeff ? csvText.slice(1) : csvText
+  const rows = parseCsvRows(cleanText)
   if (rows.length < 1) return []
 
   const headers = rows[0]