feat(finance): connection-based balances + lump-sum payment recording

Klinik-laboratuvar finance in TR is dönemsel, not job-by-job. Forcing
the lab to mark each finance_entry as paid was unrealistic — labs get a
single 50.000 TL transfer covering twelve jobs and don't want to walk a
list. Reworked the page around connection balances and free-amount
payments.

Data model
  - New 'payments' table:
      tenantId             whose ledger it lives in
      counterpartTenantId  the other side of the transaction
      direction            inflow (lab received) | outflow (clinic paid)
      amount, currency, paymentDate
      method               cash | bank | card | check | other
      notes, recordedBy
    Indexes: (tenantId, counterpartTenantId), paymentDate DESC. Permission:
    both teams can read, only owners/admins of the recording side can
    update or delete.

Server
  - recordPaymentAction: requires owner/admin, verifies an approved
    connection exists between (lab, clinic), then writes a single row.
    Direction is inferred from the caller's tenant kind so a lab can
    never accidentally book an outflow.
  - deletePaymentAction: same auth, tenant-scoped delete.
  - listPayments(tenantId) + computeBalancesByCounterpart({ kind,
    entries, payments }): one pass over both ledgers, returns
    [{ counterpartTenantId, invoiced, paid, open, lastPaymentAt }]
    sorted by open desc. invoiced pulls from finance_entries (receivable
    for lab, debt for clinic); paid pulls from the new payments table.

UI
  - /finance now leads with a Bakiye kartı: a row per connected
    counterpart showing invoiced, paid, last payment date and the open
    amount tinted green (lab alacak) or red (clinic borç), each with an
    inline 'Ödeme Al' / 'Ödeme Yap' button.
  - RecordPaymentDialog: amount (defaults to the open balance, lump
    sums obviously not pre-filled with a specific entry), date,
    currency, method (Nakit/Banka/Kart/Çek/Diğer), free-text note.
    Posts to recordPaymentAction, refresh on success.
  - Stat cards reworked: Toplam Açık Alacak/Borç and Tahsil Edilen /
    Ödenen replaced the old pending-totals so the headline numbers
    actually reflect the new flow.

Existing finance_entries (job-driven receivables/debts) remain the
single source of truth for 'how much was invoiced'; the new table tracks
'how much was actually collected'. Open balance = invoiced - paid, always
computed live — no individual entry needs to be marked 'paid' anymore.

src/app/(dashboard)/finance/components/balances-card.tsx

@@ -0,0 +1,100 @@
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
+import type { CounterpartBalance } from "@/lib/appwrite/payment-queries";
+import { RecordPaymentDialog } from "./record-payment-dialog";
+
+function formatMoney(amount: number, currency: string): string {
+  try {
+    return new Intl.NumberFormat("tr-TR", { style: "currency", currency }).format(amount);
+  } catch {
+    return `${amount.toFixed(2)} ${currency}`;
+  }
+}
+
+const dateFormatter = new Intl.DateTimeFormat("tr-TR", {
+  day: "2-digit",
+  month: "2-digit",
+  year: "numeric",
+});
+
+export function BalancesCard({
+  balances,
+  counterpartNames,
+  selfKind,
+  defaultCurrency,
+}: {
+  balances: CounterpartBalance[];
+  counterpartNames: Record<string, string>;
+  selfKind: "lab" | "clinic";
+  defaultCurrency: string;
+}) {
+  const isLab = selfKind === "lab";
+  return (
+    <Card>
+      <CardHeader>
+        <CardTitle>{isLab ? "Klinik Bakiyeleri" : "Laboratuvar Bakiyeleri"}</CardTitle>
+        <CardDescription>
+          {isLab
+            ? "Her klinik için açık bakiye ve son tahsilatlar. Toplu ödemeleri buradan girebilirsiniz."
+            : "Çalıştığınız her laboratuvar için açık bakiye ve son ödemeleriniz."}
+        </CardDescription>
+      </CardHeader>
+      <CardContent>
+        {balances.length === 0 ? (
+          <p className="text-muted-foreground py-6 text-center text-sm">
+            Bağlantılarınız için henüz finansal hareket yok.
+          </p>
+        ) : (
+          <ul className="divide-y rounded-md border">
+            {balances.map((b) => {
+              const name = counterpartNames[b.counterpartTenantId] ?? "—";
+              const settled = b.open <= 0.01;
+              return (
+                <li
+                  key={b.counterpartTenantId}
+                  className="flex flex-wrap items-center gap-3 px-3 py-3"
+                >
+                  <div className="min-w-0 flex-1">
+                    <p className="truncate font-medium">{name}</p>
+                    <p className="text-muted-foreground text-xs">
+                      Fatura: {formatMoney(b.invoiced, b.currency)} · Ödenen:{" "}
+                      {formatMoney(b.paid, b.currency)}
+                      {b.lastPaymentAt && (
+                        <>
+                          {" "}· Son ödeme:{" "}
+                          {dateFormatter.format(new Date(b.lastPaymentAt))}
+                        </>
+                      )}
+                    </p>
+                  </div>
+                  <div className="text-right">
+                    <p
+                      className={`text-base font-semibold tabular-nums ${
+                        settled
+                          ? "text-muted-foreground"
+                          : isLab
+                            ? "text-emerald-600 dark:text-emerald-400"
+                            : "text-rose-600 dark:text-rose-400"
+                      }`}
+                    >
+                      {formatMoney(b.open, b.currency)}
+                    </p>
+                    <p className="text-muted-foreground text-xs">
+                      {settled ? "Kapalı" : isLab ? "Açık alacak" : "Açık borç"}
+                    </p>
+                  </div>
+                  <RecordPaymentDialog
+                    counterpartTenantId={b.counterpartTenantId}
+                    counterpartName={name}
+                    selfKind={selfKind}
+                    defaultCurrency={b.currency || defaultCurrency}
+                    openAmount={b.open > 0 ? b.open : undefined}
+                  />
+                </li>
+              );
+            })}
+          </ul>
+        )}
+      </CardContent>
+    </Card>
+  );
+}

src/app/(dashboard)/finance/components/record-payment-dialog.tsx

@@ -0,0 +1,173 @@
+"use client";
+
+import { useActionState, useEffect, useState } from "react";
+import { useRouter } from "next/navigation";
+import { Banknote, Loader2 } from "lucide-react";
+import { toast } from "sonner";
+
+import { Button } from "@/components/ui/button";
+import {
+  Dialog,
+  DialogClose,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from "@/components/ui/dialog";
+import { Input } from "@/components/ui/input";
+import { Label } from "@/components/ui/label";
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from "@/components/ui/select";
+import { Textarea } from "@/components/ui/textarea";
+import { recordPaymentAction } from "@/lib/appwrite/payment-actions";
+import {
+  PAYMENT_METHOD_OPTIONS,
+  initialPaymentFormState,
+} from "@/lib/appwrite/payment-types";
+
+export function RecordPaymentDialog({
+  counterpartTenantId,
+  counterpartName,
+  selfKind,
+  defaultCurrency,
+  openAmount,
+  triggerLabel,
+}: {
+  counterpartTenantId: string;
+  counterpartName: string;
+  selfKind: "lab" | "clinic";
+  defaultCurrency: string;
+  openAmount?: number;
+  triggerLabel?: string;
+}) {
+  const router = useRouter();
+  const [open, setOpen] = useState(false);
+  const [state, action, pending] = useActionState(
+    recordPaymentAction,
+    initialPaymentFormState,
+  );
+
+  useEffect(() => {
+    if (state.ok) {
+      toast.success("Ödeme kaydedildi.");
+      setOpen(false);
+      router.refresh();
+    } else if (state.error) {
+      toast.error(state.error);
+    }
+  }, [state, router]);
+
+  const label = triggerLabel ?? (selfKind === "lab" ? "Ödeme Al" : "Ödeme Yap");
+  const title = selfKind === "lab" ? "Tahsilat Kaydı" : "Ödeme Kaydı";
+  const today = new Date().toISOString().slice(0, 10);
+
+  return (
+    <Dialog open={open} onOpenChange={setOpen}>
+      <Button size="sm" onClick={() => setOpen(true)}>
+        <Banknote className="size-4" />
+        {label}
+      </Button>
+      <DialogContent>
+        <DialogHeader>
+          <DialogTitle>{title} — {counterpartName}</DialogTitle>
+          <DialogDescription>
+            {selfKind === "lab"
+              ? "Bu kliniğin yaptığı toplu ödemeyi kaydedin. Açık bakiyeden otomatik düşülür."
+              : "Bu laboratuvara yaptığınız ödemeyi kaydedin."}
+            {typeof openAmount === "number" && (
+              <>
+                {" "}Açık bakiye:{" "}
+                <strong className="tabular-nums">
+                  {openAmount.toLocaleString("tr-TR")} {defaultCurrency}
+                </strong>
+              </>
+            )}
+          </DialogDescription>
+        </DialogHeader>
+        <form action={action} className="grid gap-3">
+          <input type="hidden" name="counterpartTenantId" value={counterpartTenantId} />
+          <div className="grid grid-cols-[minmax(0,1fr)_100px] gap-3">
+            <div className="grid gap-2">
+              <Label htmlFor="amount">Tutar *</Label>
+              <Input
+                id="amount"
+                name="amount"
+                type="number"
+                step="0.01"
+                min="0"
+                required
+                defaultValue={openAmount ?? undefined}
+              />
+              {state.fieldErrors?.amount && (
+                <p className="text-destructive text-xs">{state.fieldErrors.amount}</p>
+              )}
+            </div>
+            <div className="grid gap-2">
+              <Label htmlFor="currency">Para</Label>
+              <Input
+                id="currency"
+                name="currency"
+                defaultValue={defaultCurrency}
+                maxLength={8}
+                style={{ textTransform: "uppercase" }}
+              />
+            </div>
+          </div>
+          <div className="grid grid-cols-2 gap-3">
+            <div className="grid gap-2">
+              <Label htmlFor="paymentDate">Tarih</Label>
+              <Input
+                id="paymentDate"
+                name="paymentDate"
+                type="date"
+                defaultValue={today}
+              />
+            </div>
+            <div className="grid gap-2">
+              <Label htmlFor="method">Yöntem</Label>
+              <Select name="method" defaultValue="bank">
+                <SelectTrigger id="method">
+                  <SelectValue />
+                </SelectTrigger>
+                <SelectContent>
+                  {PAYMENT_METHOD_OPTIONS.map((o) => (
+                    <SelectItem key={o.value} value={o.value}>
+                      {o.label}
+                    </SelectItem>
+                  ))}
+                </SelectContent>
+              </Select>
+            </div>
+          </div>
+          <div className="grid gap-2">
+            <Label htmlFor="notes">Not (opsiyonel)</Label>
+            <Textarea
+              id="notes"
+              name="notes"
+              rows={2}
+              maxLength={1000}
+              placeholder="Örn. Ağustos toplu, dekont no 12345"
+            />
+          </div>
+          <DialogFooter>
+            <DialogClose asChild>
+              <Button type="button" variant="outline">
+                Vazgeç
+              </Button>
+            </DialogClose>
+            <Button type="submit" disabled={pending}>
+              {pending ? <Loader2 className="size-4 animate-spin" /> : <Banknote className="size-4" />}
+              Kaydet
+            </Button>
+          </DialogFooter>
+        </form>
+      </DialogContent>
+    </Dialog>
+  );
+}

src/app/(dashboard)/finance/page.tsx

@@ -1,8 +1,14 @@
 import { redirect } from "next/navigation";
 
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
+import { listApprovedConnections } from "@/lib/appwrite/connection-queries";
 import { listFinanceEntries, summarizeFinance } from "@/lib/appwrite/finance-queries";
+import {
+  computeBalancesByCounterpart,
+  listPayments,
+} from "@/lib/appwrite/payment-queries";
 import { requireTenant } from "@/lib/appwrite/tenant-guard";
+import { BalancesCard } from "./components/balances-card";
 import { FinanceTable } from "./components/finance-table";
 
 export const metadata = {
@@ -24,26 +30,56 @@ export default async function FinancePage() {
   } catch {
     redirect("/onboarding");
   }
+  if (!ctx.kind) redirect("/onboarding");
+  const kind = ctx.kind;
+
+  const [entries, payments, connections] = await Promise.all([
+    listFinanceEntries(ctx.tenantId),
+    listPayments(ctx.tenantId),
+    listApprovedConnections(ctx.tenantId),
+  ]);
 
-  const entries = await listFinanceEntries(ctx.tenantId);
   const stats = summarizeFinance(entries);
-  const isLab = ctx.kind === "lab";
+  const isLab = kind === "lab";
+  const defaultCurrency = ctx.settings?.defaultCurrency ?? "TRY";
+
+  const balances = computeBalancesByCounterpart({ kind, entries, payments });
+  const counterpartNames: Record<string, string> = {};
+  for (const c of connections) {
+    const id = isLab ? c.clinicTenantId : c.labTenantId;
+    counterpartNames[id] = c.counterpart?.companyName ?? "—";
+  }
+
+  const totalPaid = payments
+    .filter((p) => p.direction === (isLab ? "inflow" : "outflow"))
+    .reduce((sum, p) => sum + p.amount, 0);
+  const totalOpen = balances.reduce(
+    (sum, b) => sum + (b.open > 0 ? b.open : 0),
+    0,
+  );
 
   return (
     <div className="flex-1 space-y-6 px-6">
       <div className="flex flex-col gap-1">
         <h1 className="text-2xl font-bold tracking-tight">Finans</h1>
         <p className="text-muted-foreground text-sm">
-          İş bazlı tahsilat ve ödeme akışı. {isLab ? "Alacaklarınız ve gelirleriniz." : "Ödenecek ve harcamalarınız."}
+          {isLab
+            ? "Klinik bazlı açık bakiye ve toplu tahsilat."
+            : "Laboratuvar bazlı borç ve ödeme akışı."}
         </p>
       </div>
 
       <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-4">
         <StatCard
-          label={isLab ? "Bekleyen Alacak" : "Bekleyen Borç"}
+          label={isLab ? "Toplam Açık Alacak" : "Toplam Açık Borç"}
-          value={formatMoney(isLab ? stats.receivablePending : stats.payablePending, stats.currency)}
+          value={formatMoney(totalOpen, defaultCurrency)}
           tone={isLab ? "positive" : "negative"}
         />
+        <StatCard
+          label={isLab ? "Tahsil Edilen" : "Ödenen"}
+          value={formatMoney(totalPaid, defaultCurrency)}
+          tone="neutral"
+        />
         <StatCard
           label="Bu Ay Gelir"
           value={formatMoney(stats.incomeThisMonth, stats.currency)}
@@ -54,18 +90,20 @@ export default async function FinancePage() {
           value={formatMoney(stats.expenseThisMonth, stats.currency)}
           tone="negative"
         />
-        <StatCard
-          label="Toplam Kayıt"
-          value={String(entries.length)}
-          tone="neutral"
-        />
       </div>
 
+      <BalancesCard
+        balances={balances}
+        counterpartNames={counterpartNames}
+        selfKind={kind}
+        defaultCurrency={defaultCurrency}
+      />
+
       <Card>
         <CardHeader>
           <CardTitle>Hareketler</CardTitle>
           <CardDescription>
-            Tamamlanan işlerden otomatik oluşturulan finansal kayıtlar. Manuel kayıt eklemek sonraki sürümde.
+            Tamamlanan işlerden otomatik oluşturulan finansal kayıtlar.
           </CardDescription>
         </CardHeader>
         <CardContent>

src/lib/appwrite/payment-actions.ts

@@ -0,0 +1,194 @@
+"use server";
+
+import { revalidatePath } from "next/cache";
+import { AppwriteException, ID, Permission, Query, Role } from "node-appwrite";
+import { z } from "zod";
+
+import { logAudit } from "./audit";
+import {
+  DATABASE_ID,
+  TABLES,
+  type Connection,
+  type Payment,
+} from "./schema";
+import { createAdminClient } from "./server";
+import { requireRole, requireTenant } from "./tenant-guard";
+import type {
+  PaymentActionState,
+  PaymentFormState,
+} from "./payment-types";
+import { paymentSchema } from "@/lib/validation/payment";
+
+function appwriteError(e: unknown, fallback = "Beklenmeyen bir hata oluştu."): string {
+  if (e instanceof AppwriteException) return e.message || fallback;
+  return process.env.NODE_ENV !== "production" && e instanceof Error
+    ? `${fallback} (${e.message})`
+    : fallback;
+}
+
+function flattenErrors(err: z.ZodError): Record<string, string> {
+  const out: Record<string, string> = {};
+  for (const issue of err.issues) {
+    const key = issue.path.join(".");
+    if (key && !out[key]) out[key] = issue.message;
+  }
+  return out;
+}
+
+function paymentPermissions(tenantId: string, counterpartTenantId: string): string[] {
+  return [
+    Permission.read(Role.team(tenantId)),
+    Permission.read(Role.team(counterpartTenantId)),
+    Permission.update(Role.team(tenantId, "owner")),
+    Permission.update(Role.team(tenantId, "admin")),
+    Permission.delete(Role.team(tenantId, "owner")),
+    Permission.delete(Role.team(tenantId, "admin")),
+  ];
+}
+
+function pickFields(formData: FormData) {
+  return {
+    counterpartTenantId: String(formData.get("counterpartTenantId") ?? "").trim(),
+    amount: String(formData.get("amount") ?? "").trim(),
+    currency: String(formData.get("currency") ?? "").trim(),
+    paymentDate: String(formData.get("paymentDate") ?? "").trim(),
+    method: String(formData.get("method") ?? "").trim(),
+    notes: String(formData.get("notes") ?? "").trim(),
+  };
+}
+
+/**
+ * Record a payment between this tenant and a counterpart. Direction is
+ * determined by the caller's tenant kind:
+ *   - lab    → inflow  (the lab received money from a clinic)
+ *   - clinic → outflow (the clinic paid a lab)
+ *
+ * A single payment can cover many invoices at once — we do NOT walk back
+ * into finance_entries to settle individual rows. The open balance per
+ * connection is always computed live as (sum of receivables for that
+ * counterpart) - (sum of payments inflow from that counterpart) for the
+ * lab side, and the symmetric formula for the clinic side.
+ */
+export async function recordPaymentAction(
+  _prev: PaymentFormState,
+  formData: FormData,
+): Promise<PaymentFormState> {
+  let ctx;
+  try {
+    ctx = await requireTenant();
+    requireRole(ctx, ["owner", "admin"]);
+  } catch {
+    return { ok: false, error: "Ödeme kaydı için yetkiniz yok." };
+  }
+  if (!ctx.kind) {
+    return { ok: false, error: "Tenant türü bilinmiyor." };
+  }
+  const direction = ctx.kind === "lab" ? "inflow" : "outflow";
+
+  const parsed = paymentSchema.safeParse(pickFields(formData));
+  if (!parsed.success) {
+    return { ok: false, error: "Form geçersiz.", fieldErrors: flattenErrors(parsed.error) };
+  }
+
+  const { tablesDB } = createAdminClient();
+
+  // Counterpart must be an approved connection — we never let a tenant
+  // record payments against an unconnected workspace.
+  const labId = ctx.kind === "lab" ? ctx.tenantId : parsed.data.counterpartTenantId;
+  const clinicId = ctx.kind === "lab" ? parsed.data.counterpartTenantId : ctx.tenantId;
+  const connRes = await tablesDB.listRows({
+    databaseId: DATABASE_ID,
+    tableId: TABLES.connections,
+    queries: [
+      Query.equal("labTenantId", labId),
+      Query.equal("clinicTenantId", clinicId),
+      Query.equal("status", "approved"),
+      Query.limit(1),
+    ],
+  });
+  if (!(connRes.rows[0] as unknown as Connection | undefined)) {
+    return {
+      ok: false,
+      error: "Onaylı bir bağlantı bulunamadı.",
+      fieldErrors: { counterpartTenantId: "Bağlantı yok." },
+    };
+  }
+
+  try {
+    const created = await tablesDB.createRow(
+      DATABASE_ID,
+      TABLES.payments,
+      ID.unique(),
+      {
+        tenantId: ctx.tenantId,
+        counterpartTenantId: parsed.data.counterpartTenantId,
+        direction,
+        amount: parsed.data.amount,
+        currency: parsed.data.currency,
+        paymentDate: parsed.data.paymentDate,
+        method: parsed.data.method,
+        notes: parsed.data.notes,
+        recordedBy: ctx.user.id,
+      },
+      paymentPermissions(ctx.tenantId, parsed.data.counterpartTenantId),
+    );
+    void logAudit({
+      tenantId: ctx.tenantId,
+      userId: ctx.user.id,
+      action: "create",
+      entityType: "payment",
+      entityId: created.$id,
+      changes: {
+        direction,
+        amount: parsed.data.amount,
+        counterpartTenantId: parsed.data.counterpartTenantId,
+      },
+    });
+  } catch (e) {
+    return { ok: false, error: appwriteError(e, "Ödeme kaydedilemedi.") };
+  }
+
+  revalidatePath("/finance");
+  return { ok: true };
+}
+
+export async function deletePaymentAction(
+  _prev: PaymentActionState,
+  formData: FormData,
+): Promise<PaymentActionState> {
+  const id = String(formData.get("id") ?? "").trim();
+  if (!id) return { ok: false, error: "Kayıt bulunamadı." };
+
+  let ctx;
+  try {
+    ctx = await requireTenant();
+    requireRole(ctx, ["owner", "admin"]);
+  } catch {
+    return { ok: false, error: "Yetkiniz yok." };
+  }
+
+  try {
+    const { tablesDB } = createAdminClient();
+    const row = (await tablesDB.getRow(
+      DATABASE_ID,
+      TABLES.payments,
+      id,
+    )) as unknown as Payment;
+    if (row.tenantId !== ctx.tenantId) {
+      return { ok: false, error: "Yetkiniz yok." };
+    }
+    await tablesDB.deleteRow(DATABASE_ID, TABLES.payments, id);
+    void logAudit({
+      tenantId: ctx.tenantId,
+      userId: ctx.user.id,
+      action: "delete",
+      entityType: "payment",
+      entityId: id,
+    });
+  } catch (e) {
+    return { ok: false, error: appwriteError(e, "Silinemedi.") };
+  }
+
+  revalidatePath("/finance");
+  return { ok: true };
+}

src/lib/appwrite/payment-queries.ts

@@ -0,0 +1,89 @@
+import "server-only";
+
+import { Query } from "node-appwrite";
+
+import {
+  DATABASE_ID,
+  TABLES,
+  type FinanceEntry,
+  type Payment,
+  type TenantKind,
+} from "./schema";
+import { createAdminClient } from "./server";
+import { toPlain } from "./serialize";
+
+export async function listPayments(tenantId: string): Promise<Payment[]> {
+  const { tablesDB } = createAdminClient();
+  const result = await tablesDB.listRows({
+    databaseId: DATABASE_ID,
+    tableId: TABLES.payments,
+    queries: [
+      Query.equal("tenantId", tenantId),
+      Query.orderDesc("paymentDate"),
+      Query.limit(500),
+    ],
+  });
+  return toPlain(result.rows as unknown as Payment[]);
+}
+
+export type CounterpartBalance = {
+  counterpartTenantId: string;
+  currency: string;
+  /** sum of receivables (lab) or debts (clinic) from finance_entries */
+  invoiced: number;
+  /** sum of payments — inflow for lab, outflow for clinic */
+  paid: number;
+  /** invoiced - paid; positive means money is still owed to this tenant */
+  open: number;
+  /** most recent payment date if any, useful for sorting */
+  lastPaymentAt?: string;
+};
+
+/**
+ * Compute the open balance with each counterpart in a single pass over the
+ * already-loaded finance entries and payments. Lab side groups receivables
+ * and inflows by clinic; clinic side groups debts and outflows by lab.
+ */
+export function computeBalancesByCounterpart(args: {
+  kind: TenantKind;
+  entries: FinanceEntry[];
+  payments: Payment[];
+}): CounterpartBalance[] {
+  const isLab = args.kind === "lab";
+  const invoiceType = isLab ? "receivable" : "debt";
+  const paymentDirection = isLab ? "inflow" : "outflow";
+
+  const acc = new Map<string, CounterpartBalance>();
+  const ensure = (id: string, currency: string): CounterpartBalance => {
+    const existing = acc.get(id);
+    if (existing) return existing;
+    const fresh: CounterpartBalance = {
+      counterpartTenantId: id,
+      currency,
+      invoiced: 0,
+      paid: 0,
+      open: 0,
+    };
+    acc.set(id, fresh);
+    return fresh;
+  };
+
+  for (const e of args.entries) {
+    if (e.type !== invoiceType) continue;
+    if (!e.counterpartTenantId) continue;
+    const row = ensure(e.counterpartTenantId, e.currency ?? "TRY");
+    row.invoiced += e.amount;
+  }
+  for (const p of args.payments) {
+    if (p.direction !== paymentDirection) continue;
+    const row = ensure(p.counterpartTenantId, p.currency);
+    row.paid += p.amount;
+    if (!row.lastPaymentAt || p.paymentDate > row.lastPaymentAt) {
+      row.lastPaymentAt = p.paymentDate;
+    }
+  }
+  for (const row of acc.values()) {
+    row.open = row.invoiced - row.paid;
+  }
+  return Array.from(acc.values()).sort((a, b) => b.open - a.open);
+}

src/lib/appwrite/payment-types.ts

@@ -0,0 +1,26 @@
+export type PaymentFormState = {
+  ok: boolean;
+  error?: string;
+  fieldErrors?: Record<string, string>;
+};
+
+export const initialPaymentFormState: PaymentFormState = { ok: false };
+
+export type PaymentActionState = {
+  ok: boolean;
+  error?: string;
+};
+
+export const initialPaymentActionState: PaymentActionState = { ok: false };
+
+export const PAYMENT_METHOD_OPTIONS = [
+  { value: "cash", label: "Nakit" },
+  { value: "bank", label: "Banka / Havale" },
+  { value: "card", label: "Kart" },
+  { value: "check", label: "Çek / Senet" },
+  { value: "other", label: "Diğer" },
+] as const;
+
+export const PAYMENT_METHOD_LABELS: Record<string, string> = Object.fromEntries(
+  PAYMENT_METHOD_OPTIONS.map((o) => [o.value, o.label]),
+);

src/lib/appwrite/schema.ts

@@ -11,6 +11,7 @@ export const TABLES = {
   connections: "connections",
   patients: "patients",
   clinicPricing: "clinic_pricing",
+  payments: "payments",
   jobs: "jobs",
   jobFiles: "job_files",
   jobStatusHistory: "job_status_history",
@@ -174,6 +175,20 @@ export interface FinanceEntry extends Row {
   description?: string;
 }
 
+export type PaymentDirection = "inflow" | "outflow";
+
+export interface Payment extends Row {
+  tenantId: string;
+  counterpartTenantId: string;
+  direction: PaymentDirection;
+  amount: number;
+  currency: string;
+  paymentDate: string;
+  method?: string;
+  notes?: string;
+  recordedBy: string;
+}
+
 export interface Notification extends Row {
   tenantId: string;
   userId?: string;

src/lib/validation/payment.ts

@@ -0,0 +1,40 @@
+import { z } from "zod";
+
+function toNumber(v: unknown): number {
+  if (typeof v === "number") return v;
+  const n = Number(String(v ?? "").replace(",", "."));
+  return Number.isFinite(n) ? n : NaN;
+}
+
+export const paymentSchema = z.object({
+  counterpartTenantId: z.string().min(1, "Karşı taraf seçin."),
+  amount: z
+    .union([z.string(), z.number()])
+    .transform(toNumber)
+    .pipe(z.number().positive("Tutar 0'dan büyük olmalı.")),
+  currency: z
+    .string()
+    .trim()
+    .max(8)
+    .optional()
+    .transform((v) => (v ? v.toUpperCase() : "TRY")),
+  paymentDate: z
+    .string()
+    .trim()
+    .optional()
+    .transform((v) => (v ? new Date(v).toISOString() : new Date().toISOString())),
+  method: z
+    .string()
+    .trim()
+    .max(30)
+    .optional()
+    .transform((v) => (v ? v : undefined)),
+  notes: z
+    .string()
+    .trim()
+    .max(1000)
+    .optional()
+    .transform((v) => (v ? v : undefined)),
+});
+
+export type PaymentInput = z.infer<typeof paymentSchema>;