feat(transactions): manual transaction support and multi-owner query infrastructure

- Add POST /api/transactions to create manual transactions (statement_id=NULL, owner_id set directly)
- Queries switch from JOIN to LEFT JOIN statements so manual transactions are visible
- COALESCE(t.owner_id, s.owner_id) throughout for owner resolution
- Add "Manual" bank filter option in getTransactions
- Search extended to include merchant_normalized override
- Split data fetched via lateral subquery on every transaction row
- getParticipantBalances rewritten as UNION for bidirectional net balances
  (credits/refunds negate, split from either side of the relationship)
- getSharedTransactions: remove my_share_percent from SELECT (fixes GROUP BY error),
  WHERE rewritten as two distinct cases (owner with others split vs participant on others' txn)
- getTransactions: OR EXISTS condition so split participants see shared transactions
- add-transaction-modal component for creating manual transactions with splits
- 0008_my_share_percent migration adds my_share_percent to transaction_overrides

src/app/api/transactions/route.ts

@@ -1,6 +1,7 @@
 import { NextRequest, NextResponse } from "next/server";
 import { getCurrentUser } from "@/lib/auth";
 import { getTransactions } from "@/lib/queries";
+import { queryRaw } from "@/lib/db";
 
 export async function GET(req: NextRequest) {
   const user = await getCurrentUser(req);
@@ -23,3 +24,54 @@ export async function GET(req: NextRequest) {
 
   return NextResponse.json(result);
 }
+
+export async function POST(req: NextRequest) {
+  const user = await getCurrentUser(req);
+  if (!user) return NextResponse.json({ error: "Unauthorized" }, { status: 403 });
+
+  const body = await req.json() as {
+    date: string;
+    description: string;
+    amount: number;
+    transaction_type?: string;
+    merchant_normalized?: string;
+    category?: string;
+    splits?: { participant_id: number; share_percent: number }[];
+  };
+
+  if (!body.date || !body.description || body.amount == null) {
+    return NextResponse.json({ error: "date, description, amount are required" }, { status: 400 });
+  }
+
+  // Insert manual transaction with no statement (statement_id = NULL, owner_id set directly)
+  const txRows = await queryRaw<{ id: number }>(
+    `INSERT INTO transactions (statement_id, owner_id, transaction_date, description, amount, transaction_type, merchant_normalized, category, row_index)
+     VALUES (NULL, $1, $2, $3, $4, $5, $6, $7, (
+       SELECT COALESCE(MAX(row_index), -1) + 1 FROM transactions WHERE owner_id = $1 AND statement_id IS NULL
+     ))
+     RETURNING id`,
+    [
+      user.id,
+      body.date,
+      body.description,
+      body.amount,
+      body.transaction_type || "debit",
+      body.merchant_normalized || null,
+      body.category || null,
+    ]
+  );
+  const transactionId = txRows[0].id;
+
+  // Insert splits if provided
+  if (body.splits?.length) {
+    for (const s of body.splits) {
+      await queryRaw(
+        `INSERT INTO transaction_splits (transaction_id, participant_id, share_percent)
+         VALUES ($1, $2, $3) ON CONFLICT DO NOTHING`,
+        [transactionId, s.participant_id, s.share_percent]
+      );
+    }
+  }
+
+  return NextResponse.json({ id: transactionId }, { status: 201 });
+}

src/components/add-transaction-modal.tsx

@@ -0,0 +1,215 @@
+"use client";
+
+import { useState } from "react";
+import { useCreateTransaction, useParticipants } from "@/lib/hooks";
+import { CATEGORIES, formatCategory } from "@/lib/categories";
+
+const TRANSACTION_TYPES = ["debit", "credit", "payment", "refund", "fee", "interest", "transfer"];
+
+interface Prefill {
+  date?: string;
+  description?: string;
+  amount?: number;
+  transaction_type?: string;
+  merchant_normalized?: string;
+  category?: string;
+  splits?: { participant_id: number; share_percent: number }[];
+}
+
+export function AddTransactionModal({
+  prefill,
+  title,
+  onClose,
+}: {
+  prefill?: Prefill;
+  title?: string;
+  onClose: () => void;
+}) {
+  const createTransaction = useCreateTransaction();
+  const { data: participants = [] } = useParticipants();
+
+  const [date, setDate] = useState(prefill?.date ?? new Date().toISOString().slice(0, 10));
+  const [description, setDescription] = useState(prefill?.description ?? "");
+  const [amount, setAmount] = useState(prefill?.amount != null ? String(prefill.amount) : "");
+  const [type, setType] = useState(prefill?.transaction_type ?? "debit");
+  const [merchant, setMerchant] = useState(prefill?.merchant_normalized ?? "");
+  const [category, setCategory] = useState(prefill?.category ?? "");
+  const [splits, setSplits] = useState<{ participant_id: number; share_percent: number }[]>(
+    prefill?.splits ?? []
+  );
+
+  function addSplit() {
+    if (!participants.length) return;
+    setSplits([...splits, { participant_id: participants[0].id, share_percent: 50 }]);
+  }
+
+  function updateSplit(i: number, patch: Partial<{ participant_id: number; share_percent: number }>) {
+    setSplits(splits.map((s, idx) => (idx === i ? { ...s, ...patch } : s)));
+  }
+
+  function removeSplit(i: number) {
+    setSplits(splits.filter((_, idx) => idx !== i));
+  }
+
+  async function handleSubmit(e: React.FormEvent) {
+    e.preventDefault();
+    await createTransaction.mutateAsync({
+      date,
+      description,
+      amount: parseFloat(amount),
+      transaction_type: type,
+      merchant_normalized: merchant || undefined,
+      category: category || undefined,
+      splits: splits.length ? splits : undefined,
+    });
+    onClose();
+  }
+
+  const splitTotal = splits.reduce((s, e) => s + (e.share_percent || 0), 0);
+
+  return (
+    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/60" onClick={onClose}>
+      <div
+        className="bg-zinc-900 border border-zinc-700 rounded-xl p-6 w-full max-w-md shadow-2xl space-y-4"
+        onClick={(e) => e.stopPropagation()}
+      >
+        <h3 className="font-semibold text-sm text-zinc-300">{title ?? "Add Transaction"}</h3>
+
+        <form onSubmit={handleSubmit} className="space-y-3">
+          <div className="grid grid-cols-2 gap-3">
+            <div>
+              <label className="block text-xs text-zinc-500 mb-1">Date</label>
+              <input
+                type="date"
+                required
+                value={date}
+                onChange={(e) => setDate(e.target.value)}
+                className="w-full bg-zinc-800 border border-zinc-700 rounded px-2 py-1.5 text-sm"
+              />
+            </div>
+            <div>
+              <label className="block text-xs text-zinc-500 mb-1">Amount</label>
+              <input
+                type="number"
+                step="0.01"
+                required
+                value={amount}
+                onChange={(e) => setAmount(e.target.value)}
+                placeholder="0.00"
+                className="w-full bg-zinc-800 border border-zinc-700 rounded px-2 py-1.5 text-sm"
+              />
+            </div>
+          </div>
+
+          <div>
+            <label className="block text-xs text-zinc-500 mb-1">Description</label>
+            <input
+              required
+              value={description}
+              onChange={(e) => setDescription(e.target.value)}
+              placeholder="e.g. Coles Wyndham Vale"
+              className="w-full bg-zinc-800 border border-zinc-700 rounded px-2 py-1.5 text-sm"
+            />
+          </div>
+
+          <div className="grid grid-cols-2 gap-3">
+            <div>
+              <label className="block text-xs text-zinc-500 mb-1">Type</label>
+              <select
+                value={type}
+                onChange={(e) => setType(e.target.value)}
+                className="w-full bg-zinc-800 border border-zinc-700 rounded px-2 py-1.5 text-sm"
+              >
+                {TRANSACTION_TYPES.map((t) => (
+                  <option key={t} value={t}>{t}</option>
+                ))}
+              </select>
+            </div>
+            <div>
+              <label className="block text-xs text-zinc-500 mb-1">Category</label>
+              <select
+                value={category}
+                onChange={(e) => setCategory(e.target.value)}
+                className="w-full bg-zinc-800 border border-zinc-700 rounded px-2 py-1.5 text-sm"
+              >
+                <option value="">— none —</option>
+                {CATEGORIES.map((c) => (
+                  <option key={c} value={c}>{formatCategory(c)}</option>
+                ))}
+              </select>
+            </div>
+          </div>
+
+          <div>
+            <label className="block text-xs text-zinc-500 mb-1">Merchant (optional)</label>
+            <input
+              value={merchant}
+              onChange={(e) => setMerchant(e.target.value)}
+              placeholder="Normalized merchant name"
+              className="w-full bg-zinc-800 border border-zinc-700 rounded px-2 py-1.5 text-sm"
+            />
+          </div>
+
+          {/* Splits */}
+          <div>
+            <div className="flex items-center justify-between mb-1">
+              <label className="text-xs text-zinc-500">
+                Splits (optional)
+                {splits.length > 0 && (
+                  <span className={`ml-2 ${splitTotal === 100 ? "text-emerald-400" : "text-amber-400"}`}>
+                    {splitTotal}%
+                  </span>
+                )}
+              </label>
+              {participants.length > 0 && (
+                <button type="button" onClick={addSplit} className="text-xs text-indigo-400 hover:text-indigo-300">
+                  + Add
+                </button>
+              )}
+            </div>
+            {splits.map((s, i) => (
+              <div key={i} className="flex gap-2 mb-1.5 items-center">
+                <select
+                  value={s.participant_id}
+                  onChange={(e) => updateSplit(i, { participant_id: Number(e.target.value) })}
+                  className="flex-1 bg-zinc-800 border border-zinc-700 rounded px-2 py-1.5 text-sm"
+                >
+                  {participants.map((p) => (
+                    <option key={p.id} value={p.id}>{p.name}</option>
+                  ))}
+                </select>
+                <input
+                  type="number"
+                  min={0}
+                  max={100}
+                  value={s.share_percent}
+                  onChange={(e) => updateSplit(i, { share_percent: Number(e.target.value) })}
+                  className="w-16 bg-zinc-800 border border-zinc-700 rounded px-2 py-1.5 text-sm"
+                />
+                <span className="text-xs text-zinc-500">%</span>
+                <button type="button" onClick={() => removeSplit(i)} className="text-zinc-500 hover:text-red-400 text-lg leading-none">×</button>
+              </div>
+            ))}
+          </div>
+
+          <div className="flex gap-2 pt-1">
+            <button
+              type="submit"
+              disabled={createTransaction.isPending}
+              className="flex-1 px-4 py-2 bg-indigo-600 hover:bg-indigo-500 text-white rounded-lg text-sm font-medium disabled:opacity-50"
+            >
+              {createTransaction.isPending ? "Saving..." : "Save Transaction"}
+            </button>
+            <button
+              type="button"
+              onClick={onClose}
+              className="px-4 py-2 bg-zinc-800 hover:bg-zinc-700 text-zinc-300 rounded-lg text-sm"
+            >
+              Cancel
+            </button>
+          </div>
+        </form>
+      </div>
+    </div>
+  );
+}

src/lib/hooks.ts

@@ -83,6 +83,35 @@ export function useBanks() {
   });
 }
 
+export function useCreateTransaction() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: async (data: {
+      date: string;
+      description: string;
+      amount: number;
+      transaction_type?: string;
+      merchant_normalized?: string;
+      category?: string;
+      splits?: { participant_id: number; share_percent: number }[];
+    }) => {
+      const res = await fetch("/api/transactions", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify(data),
+      });
+      if (!res.ok) throw new Error((await res.json()).error || "Failed to create transaction");
+      return res.json();
+    },
+    onSuccess: () => {
+      qc.invalidateQueries({ queryKey: ["transactions"] });
+      qc.invalidateQueries({ queryKey: ["splits"] });
+      qc.invalidateQueries({ queryKey: ["shared-transactions"] });
+      qc.invalidateQueries({ queryKey: ["participant-balances"] });
+    },
+  });
+}
+
 export function useUpdateTransaction() {
   const qc = useQueryClient();
   return useMutation({
@@ -95,6 +124,10 @@ export function useUpdateTransaction() {
       merchant_normalized?: string;
       notes?: string;
       transaction_type?: string;
+      my_share_percent?: number | null;
+      description?: string;
+      amount?: number;
+      transaction_date?: string;
     }) => {
       const res = await fetch(`/api/transactions/${id}`, {
         method: "PATCH",
@@ -106,6 +139,7 @@ export function useUpdateTransaction() {
     onSuccess: () => {
       qc.invalidateQueries({ queryKey: ["transactions"] });
       qc.invalidateQueries({ queryKey: ["transaction"] });
+      qc.invalidateQueries({ queryKey: ["analytics"] });
     },
   });
 }
@@ -421,14 +455,54 @@ export function useDeleteRule() {
 export function useApplyRules() {
   const qc = useQueryClient();
   return useMutation({
-    mutationFn: async () => {
-      const res = await fetch("/api/rules/apply", { method: "POST" });
+    mutationFn: async (splitFrom?: string) => {
+      const res = await fetch("/api/rules/apply", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ splitFrom: splitFrom || null }),
+      });
       if (!res.ok) throw new Error("Failed to apply rules");
-      return res.json() as Promise<{ matched: number; transactions_affected: number }>;
+      return res.json() as Promise<{ id: number; matched: number; transactions_affected: number }>;
     },
     onSuccess: () => {
       qc.invalidateQueries({ queryKey: ["transactions"] });
       qc.invalidateQueries({ queryKey: ["rules"] });
+      qc.invalidateQueries({ queryKey: ["rule-runs"] });
+    },
+  });
+}
+
+export interface RuleRun {
+  id: number;
+  applied_at: string;
+  split_from: string | null;
+  matched: number;
+  transactions_affected: number;
+  reverted_at: string | null;
+}
+
+export function useRuleRuns() {
+  return useQuery({
+    queryKey: ["rule-runs"],
+    queryFn: async () => {
+      const res = await fetch("/api/rules/apply");
+      if (!res.ok) throw new Error("Failed to fetch rule runs");
+      return res.json() as Promise<RuleRun[]>;
+    },
+  });
+}
+
+export function useRevertRuleRun() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: async (runId: number) => {
+      const res = await fetch(`/api/rules/apply/${runId}/revert`, { method: "POST" });
+      if (!res.ok) throw new Error("Failed to revert run");
+      return res.json() as Promise<{ reverted: number }>;
+    },
+    onSuccess: () => {
+      qc.invalidateQueries({ queryKey: ["transactions"] });
+      qc.invalidateQueries({ queryKey: ["rule-runs"] });
     },
   });
 }

src/lib/queries.ts

@@ -8,7 +8,7 @@ export interface TagRow {
 
 export interface TransactionRow {
   id: number;
-  statement_id: number;
+  statement_id: number | null;
   transaction_date: string;
   description: string;
   amount: number;
@@ -26,14 +26,17 @@ export interface TransactionRow {
   category_override: string | null;
   merchant_override: string | null;
   notes: string | null;
+  my_share_percent: number | null;
   effective_category: string;
   effective_merchant: string;
-  // statement context
+  // statement context (null for manual transactions)
   bank_name: string;
   owner_id: number;
   owner_name: string;
   // tags
   tags: TagRow[];
+  // splits
+  splits: { participant_id: number; name: string; share_percent: number; settled: boolean }[];
 }
 
 export interface StatementRow {
@@ -79,7 +82,7 @@ interface TransactionFilters {
 }
 
 export async function getTransactions(ownerId: number, filters: TransactionFilters) {
-  const conditions: string[] = [`s.owner_id = $1`];
+  const conditions: string[] = [`(COALESCE(t.owner_id, s.owner_id) = $1 OR EXISTS (SELECT 1 FROM transaction_splits ts_me WHERE ts_me.transaction_id = t.id AND ts_me.participant_id = $1))`];
   const params: unknown[] = [ownerId];
   let paramIdx = 2;
 
@@ -96,11 +99,15 @@ export async function getTransactions(ownerId: number, filters: TransactionFilte
     params.push(filters.category);
   }
   if (filters.bank_name) {
-    conditions.push(`s.bank_name = $${paramIdx++}`);
-    params.push(filters.bank_name);
+    if (filters.bank_name === "Manual") {
+      conditions.push(`t.statement_id IS NULL`);
+    } else {
+      conditions.push(`s.bank_name = $${paramIdx++}`);
+      params.push(filters.bank_name);
+    }
   }
   if (filters.search) {
-    conditions.push(`(t.description ILIKE $${paramIdx} OR t.merchant_name ILIKE $${paramIdx})`);
+    conditions.push(`(t.description ILIKE $${paramIdx} OR t.merchant_name ILIKE $${paramIdx} OR COALESCE(o.merchant_normalized, t.merchant_normalized) ILIKE $${paramIdx})`);
     params.push(`%${filters.search}%`);
     paramIdx++;
   }
@@ -124,7 +131,7 @@ export async function getTransactions(ownerId: number, filters: TransactionFilte
     SELECT COUNT(*)::int as total
     FROM transactions t
     LEFT JOIN transaction_overrides o ON o.transaction_id = t.id
-    JOIN statements s ON s.id = t.statement_id
+    LEFT JOIN statements s ON s.id = t.statement_id
     ${where}
   `;
   const countResult = await queryRaw<{ total: number }>(countSql, params);
@@ -132,32 +139,41 @@ export async function getTransactions(ownerId: number, filters: TransactionFilte
 
   const dataSql = `
     SELECT t.*,
-      o.category_override, o.merchant_normalized as merchant_override, o.notes,
+      o.category_override, o.merchant_normalized as merchant_override, o.notes, o.my_share_percent,
       COALESCE(o.category_override, t.category) as effective_category,
       COALESCE(o.merchant_normalized, t.merchant_normalized, t.merchant_name) as effective_merchant,
-      s.bank_name, s.owner_id,
+      COALESCE(s.bank_name, 'Manual') as bank_name,
+      COALESCE(t.owner_id, s.owner_id) as owner_id,
       p.name as owner_name,
-      txn_tags.tags
+      txn_tags.tags,
+      txn_splits.splits
     FROM transactions t
     LEFT JOIN transaction_overrides o ON o.transaction_id = t.id
-    JOIN statements s ON s.id = t.statement_id
-    LEFT JOIN participants p ON p.id = s.owner_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 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
       JOIN tags tg ON tg.id = tt.tag_id
       WHERE tt.transaction_id = t.id
     ) txn_tags ON true
+    LEFT JOIN LATERAL (
+      SELECT COALESCE(json_agg(json_build_object('participant_id', ts.participant_id, 'name', sp.name, 'share_percent', ts.share_percent, 'settled', ts.settled) ORDER BY sp.name), '[]'::json) as splits
+      FROM transaction_splits ts
+      JOIN participants sp ON sp.id = ts.participant_id
+      WHERE ts.transaction_id = t.id
+    ) txn_splits ON true
     ${where}
     ORDER BY ${sortCol} ${sortDir}, t.row_index ASC
     LIMIT $${paramIdx++} OFFSET $${paramIdx++}
   `;
   params.push(limit, offset);
 
-  const raw = await queryRaw<TransactionRow & { tags: string | TagRow[] }>(dataSql, params);
+  const raw = await queryRaw<TransactionRow & { tags: string | TagRow[]; splits: string | TransactionRow["splits"] }>(dataSql, params);
   const data = raw.map((r) => ({
     ...r,
     tags: typeof r.tags === "string" ? JSON.parse(r.tags) : (r.tags ?? []),
+    splits: typeof r.splits === "string" ? JSON.parse(r.splits) : (r.splits ?? []),
   })) as TransactionRow[];
 
   return { data, total, limit, offset };
@@ -166,15 +182,16 @@ export async function getTransactions(ownerId: number, filters: TransactionFilte
 export async function getTransactionById(id: number) {
   const sql = `
     SELECT t.*,
-      o.category_override, o.merchant_normalized as merchant_override, o.notes,
+      o.category_override, o.merchant_normalized as merchant_override, o.notes, o.my_share_percent,
       COALESCE(o.category_override, t.category) as effective_category,
       COALESCE(o.merchant_normalized, t.merchant_normalized, t.merchant_name) as effective_merchant,
-      s.bank_name, s.owner_id,
+      COALESCE(s.bank_name, 'Manual') as bank_name,
+      COALESCE(t.owner_id, s.owner_id) as owner_id,
       p.name as owner_name
     FROM transactions t
     LEFT JOIN transaction_overrides o ON o.transaction_id = t.id
-    JOIN statements s ON s.id = t.statement_id
-    LEFT JOIN participants p ON p.id = s.owner_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)
     WHERE t.id = $1
   `;
   const rows = await queryRaw<TransactionRow>(sql, [id]);
@@ -220,8 +237,13 @@ export async function getMerchantSuggestions(search: string) {
 }
 
 export async function getBankNames() {
-  const sql = `SELECT DISTINCT bank_name FROM statements ORDER BY bank_name`;
-  return queryRaw<{ bank_name: string }>(sql);
+  const [bankRows, manualCount] = await Promise.all([
+    queryRaw<{ bank_name: string }>(`SELECT DISTINCT bank_name FROM statements ORDER BY bank_name`),
+    queryRaw<{ count: number }>(`SELECT COUNT(*)::int as count FROM transactions WHERE statement_id IS NULL`),
+  ]);
+  const banks = bankRows.map((r) => r.bank_name);
+  if (manualCount[0]?.count > 0) banks.push("Manual");
+  return banks;
 }
 
 export interface ParticipantBalance {
@@ -234,13 +256,35 @@ export interface ParticipantBalance {
 export async function getParticipantBalances(ownerId: number) {
   return queryRaw<ParticipantBalance>(`
     SELECT p.id, p.name,
-      COALESCE(SUM(CASE WHEN ts.settled = false THEN t.amount * ts.share_percent / 100 ELSE 0 END), 0)::numeric(12,2) as total_owed,
-      COUNT(CASE WHEN ts.settled = false THEN 1 END)::int as unsettled_count
+      COALESCE(SUM(combined.signed_amount), 0)::numeric(12,2) as total_owed,
+      COALESCE(SUM(combined.unsettled_count), 0)::int as unsettled_count
     FROM participants p
-    LEFT JOIN transaction_splits ts ON ts.participant_id = p.id
-    LEFT JOIN transactions t ON t.id = ts.transaction_id
-    LEFT JOIN statements s ON s.id = t.statement_id
-    WHERE (s.owner_id = $1 OR s.id IS NULL)
+    LEFT JOIN (
+      -- They owe me: their splits on transactions I own
+      SELECT ts.participant_id AS pid,
+        CASE WHEN ts.settled = false
+          THEN (CASE WHEN t.transaction_type IN ('debit', 'fee', 'interest') THEN t.amount ELSE -t.amount END) * ts.share_percent / 100
+          ELSE 0 END AS signed_amount,
+        CASE WHEN ts.settled = false AND t.transaction_type IN ('debit', 'fee', 'interest') THEN 1 ELSE 0 END AS unsettled_count
+      FROM transaction_splits ts
+      JOIN transactions t ON t.id = ts.transaction_id
+      LEFT JOIN statements s ON s.id = t.statement_id
+      WHERE COALESCE(t.owner_id, s.owner_id) = $1 AND ts.participant_id != $1
+
+      UNION ALL
+
+      -- I owe them: my splits on transactions they own
+      SELECT COALESCE(t.owner_id, s.owner_id) AS pid,
+        CASE WHEN ts.settled = false
+          THEN -(CASE WHEN t.transaction_type IN ('debit', 'fee', 'interest') THEN t.amount ELSE -t.amount END) * ts.share_percent / 100
+          ELSE 0 END AS signed_amount,
+        0 AS unsettled_count
+      FROM transaction_splits ts
+      JOIN transactions t ON t.id = ts.transaction_id
+      LEFT JOIN statements s ON s.id = t.statement_id
+      WHERE ts.participant_id = $1 AND COALESCE(t.owner_id, s.owner_id) != $1
+    ) combined ON combined.pid = p.id
+    WHERE p.id != $1
     GROUP BY p.id, p.name
     ORDER BY p.name
   `, [ownerId]);
@@ -267,7 +311,8 @@ export async function getSharedTransactions(ownerId: number) {
       o.category_override, o.merchant_normalized as merchant_override, o.notes,
       COALESCE(o.category_override, t.category) as effective_category,
       COALESCE(o.merchant_normalized, t.merchant_normalized, t.merchant_name) as effective_merchant,
-      s.bank_name, s.owner_id,
+      COALESCE(s.bank_name, 'Manual') as bank_name,
+      COALESCE(t.owner_id, s.owner_id) as owner_id,
       p_owner.name as owner_name,
       json_agg(json_build_object(
         'split_id', ts.id,
@@ -280,13 +325,16 @@ export async function getSharedTransactions(ownerId: number) {
     JOIN transaction_splits ts ON ts.transaction_id = t.id
     JOIN participants p ON p.id = ts.participant_id
     LEFT JOIN transaction_overrides o ON o.transaction_id = t.id
-    JOIN statements s ON s.id = t.statement_id
-    LEFT JOIN participants p_owner ON p_owner.id = s.owner_id
-    WHERE s.owner_id = $1
-      AND EXISTS (
-        SELECT 1 FROM transaction_splits ts2
-        JOIN participants p2 ON p2.id = ts2.participant_id
-        WHERE ts2.transaction_id = t.id AND p2.name != 'Me'
+    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)
+    WHERE (
+        -- I own this transaction and at least one other person has a split
+        COALESCE(t.owner_id, s.owner_id) = $1
+        AND EXISTS (SELECT 1 FROM transaction_splits ts2 WHERE ts2.transaction_id = t.id AND ts2.participant_id != $1)
+      ) OR (
+        -- Someone else owns this transaction and I have a split on it
+        COALESCE(t.owner_id, s.owner_id) != $1
+        AND EXISTS (SELECT 1 FROM transaction_splits ts_me WHERE ts_me.transaction_id = t.id AND ts_me.participant_id = $1)
       )
     GROUP BY t.id, o.category_override, o.merchant_normalized, o.notes, s.bank_name, s.owner_id, p_owner.name
     ORDER BY t.transaction_date DESC