Fix build errors and prepare for deployment

- Fix const reassignment in Phase 2 reports export (use let for mutable vars)
- Fix TypeScript interface to match Prisma reconciliation schema
- Fix array comparison logic in bank CSV parsing
- Temporarily disable pdf-parse due to module compatibility issue (pre-existing)

All phases now build successfully with zero errors.

src/lib/bankReconciliation.ts

@@ -79,7 +79,8 @@ function detectColumn(headerLine: string, keywords: string[]): number {
       if (cols[i].includes(keyword)) return i;
     }
   }
-  return keywords === ['date', 'transaction date', 'date of transaction'] ? 0 : 1;
+  // Default to column 0 for date, column 1 for others
+  return keywords[0] === 'date' ? 0 : 1;
 }
 
 function parseCSVRow(line: string): string[] {