Add feature batch 2, subscription/recurring sync, smooth charts, and app icon

- Implement subscriptions view with bidirectional recurring transaction sync
- Add cascade delete/pause/resume between subscriptions and recurring
- Fix foreign key constraints when deleting recurring transactions
- Add cross-view instant refresh via callback pattern
- Replace Bezier chart smoothing with Fritsch-Carlson monotone Hermite interpolation
- Smooth budget sparklines using shared monotone_subdivide function
- Add vertical spacing to budget rows
- Add app icon (receipt on GNOME blue) in all sizes for desktop, web, and AppImage
- Add calendar, credit cards, forecast, goals, insights, and wishlist views
- Add date picker, numpad, quick-add, category combo, and edit dialog components
- Add import/export for CSV, JSON, OFX, QIF formats
- Add NLP transaction parsing, OCR receipt scanning, expression evaluator
- Add notification support, Sankey chart, tray icon
- Add demo data seeder with full DB wipe
- Expand database schema with subscriptions, goals, credit cards, and more

outlay-core/src/export_csv.rs

@@ -39,7 +39,7 @@ pub fn export_transactions_csv<W: Write>(
     let transactions = db.list_all_transactions(from, to)?;
     let mut wtr = Writer::from_writer(writer);
 
-    wtr.write_record(["Date", "Type", "Category", "Amount", "Currency", "Exchange Rate", "Note"])?;
+    wtr.write_record(["Date", "Type", "Category", "Amount", "Currency", "Exchange Rate", "Note", "Payee"])?;
 
     for txn in &transactions {
         let cat_name = db
@@ -55,6 +55,7 @@ pub fn export_transactions_csv<W: Write>(
             txn.currency.clone(),
             format!("{:.4}", txn.exchange_rate),
             txn.note.clone().unwrap_or_default(),
+            txn.payee.clone().unwrap_or_default(),
         ])?;
     }
 
@@ -86,6 +87,7 @@ mod tests {
             note: Some("Lunch".to_string()),
             date: NaiveDate::from_ymd_opt(2026, 3, 1).unwrap(),
             recurring_id: None,
+            payee: None,
         };
         db.insert_transaction(&txn).unwrap();
 
@@ -96,7 +98,7 @@ mod tests {
         let output = String::from_utf8(buf).unwrap();
         let lines: Vec<&str> = output.trim().lines().collect();
         assert_eq!(lines.len(), 2);
-        assert_eq!(lines[0], "Date,Type,Category,Amount,Currency,Exchange Rate,Note");
+        assert_eq!(lines[0], "Date,Type,Category,Amount,Currency,Exchange Rate,Note,Payee");
         assert!(lines[1].contains("2026-03-01"));
         assert!(lines[1].contains("expense"));
         assert!(lines[1].contains("42.50"));
@@ -131,6 +133,7 @@ mod tests {
                 note: None,
                 date: NaiveDate::from_ymd_opt(2026, 1, day).unwrap(),
                 recurring_id: None,
+                payee: None,
             };
             db.insert_transaction(&txn).unwrap();
         }
@@ -162,6 +165,7 @@ mod tests {
             note: None,
             date: NaiveDate::from_ymd_opt(2026, 2, 1).unwrap(),
             recurring_id: None,
+            payee: None,
         };
         let txn2 = NewTransaction {
             amount: 1000.0,
@@ -172,6 +176,7 @@ mod tests {
             note: Some("Salary".to_string()),
             date: NaiveDate::from_ymd_opt(2026, 2, 1).unwrap(),
             recurring_id: None,
+            payee: None,
         };
         db.insert_transaction(&txn1).unwrap();
         db.insert_transaction(&txn2).unwrap();