feat(transactions): add imported date column, split filter, and sortable columns

- Show created_at as "Imported" column in transactions and shared views
- For reconciled transactions, show original CSV import date (not statement processing date) via LEFT JOIN on reconciled_with_id
- Add has_split filter (all/split only/unsplit only) to transactions page
- Transactions table: sortable by imported date; split filter dropdown
- Shared table: client-side sort by date, imported, and amount

src/lib/hooks.ts

@@ -26,6 +26,7 @@ interface TransactionFilters {
   offset?: number;
   amount_min?: number;
   amount_max?: number;
+  has_split?: string;
 }
 
 function buildParams(filters: TransactionFilters): string {

src/lib/queries.ts

@@ -82,6 +82,7 @@ interface TransactionFilters {
   offset?: number;
   amount_min?: number;
   amount_max?: number;
+  has_split?: string;
 }
 
 export async function getTransactions(ownerId: number, filters: TransactionFilters) {
@@ -148,10 +149,15 @@ export async function getTransactions(ownerId: number, filters: TransactionFilte
     conditions.push(`t.amount <= $${paramIdx++}`);
     params.push(filters.amount_max);
   }
+  if (filters.has_split === "yes") {
+    conditions.push(`EXISTS (SELECT 1 FROM transaction_splits ts_f WHERE ts_f.transaction_id = t.id)`);
+  } else if (filters.has_split === "no") {
+    conditions.push(`NOT EXISTS (SELECT 1 FROM transaction_splits ts_f WHERE ts_f.transaction_id = t.id)`);
+  }
 
   const where = `WHERE ${conditions.join(" AND ")}`;
 
-  const sortCol = filters.sort_by === "amount" ? "t.amount" : "t.transaction_date";
+  const sortCol = filters.sort_by === "amount" ? "t.amount" : filters.sort_by === "created_at" ? "t.created_at" : "t.transaction_date";
   const sortDir = filters.sort_dir === "asc" ? "ASC" : "DESC";
   const limit = filters.limit || 50;
   const offset = filters.offset || 0;
@@ -174,12 +180,14 @@ export async function getTransactions(ownerId: number, filters: TransactionFilte
       COALESCE(s.bank_name, 'Manual') as bank_name,
       COALESCE(t.owner_id, s.owner_id) as owner_id,
       p.name as owner_name,
+      COALESCE(src.created_at, t.created_at) as created_at,
       txn_tags.tags,
       txn_splits.splits
     FROM transactions t
     LEFT JOIN transaction_overrides o ON o.transaction_id = t.id
     LEFT JOIN statements s ON s.id = t.statement_id
     LEFT JOIN participants p ON p.id = COALESCE(t.owner_id, s.owner_id)
+    LEFT JOIN transactions src ON src.reconciled_with_id = t.id AND src.statement_id IS NULL
     LEFT JOIN LATERAL (
       SELECT COALESCE(json_agg(json_build_object('id', tg.id, 'name', tg.name, 'color', tg.color) ORDER BY tg.name), '[]'::json) as tags
       FROM transaction_tags tt
@@ -552,6 +560,7 @@ export async function getSharedTransactions(ownerId: number, tagIds?: number[],
       COALESCE(s.bank_name, 'Manual') as bank_name,
       COALESCE(t.owner_id, s.owner_id) as owner_id,
       p_owner.name as owner_name,
+      COALESCE(src.created_at, t.created_at) as created_at,
       json_agg(json_build_object(
         'split_id', ts.id,
         'participant_id', ts.participant_id,
@@ -565,6 +574,7 @@ export async function getSharedTransactions(ownerId: number, tagIds?: number[],
     LEFT JOIN transaction_overrides o ON o.transaction_id = t.id
     LEFT JOIN statements s ON s.id = t.statement_id
     LEFT JOIN participants p_owner ON p_owner.id = COALESCE(t.owner_id, s.owner_id)
+    LEFT JOIN transactions src ON src.reconciled_with_id = t.id AND src.statement_id IS NULL
     WHERE (
         (
           COALESCE(t.owner_id, s.owner_id) = $1
@@ -575,7 +585,7 @@ export async function getSharedTransactions(ownerId: number, tagIds?: number[],
         )
       )
     ${tagClause}
-    GROUP BY t.id, o.category_override, o.merchant_normalized, o.notes, s.bank_name, s.owner_id, p_owner.name
+    GROUP BY t.id, o.category_override, o.merchant_normalized, o.notes, s.bank_name, s.owner_id, p_owner.name, src.created_at
     ORDER BY t.transaction_date DESC
   `, params);