feat(dashboard): implement daily journal functionality with CRUD operations

- Added actions for creating, updating, and deleting daily log records in `actions.ts`.
- Introduced `journal-client.tsx` for rendering the journal UI, including log entries and statistics.
- Refactored `page.tsx` to fetch user-specific daily logs from Supabase and display them using the new client component.
- Implemented form handling for daily log creation and updates, including mood and energy scoring.

app/(dashboard)/finance/actions.ts

@@ -0,0 +1,122 @@
+"use server";
+
+import { createClient } from "@/lib/supabase/server";
+import { revalidatePath } from "next/cache";
+
+const TRANSACTION_TYPES = ["income", "expense"] as const;
+const PAYMENT_STATUSES = ["planned", "pending", "paid", "cancelled"] as const;
+
+function cleanText(value: FormDataEntryValue | null) {
+  const text = typeof value === "string" ? value.trim() : "";
+  return text.length > 0 && text !== "__none" ? text : null;
+}
+
+function readType(value: FormDataEntryValue | null) {
+  const type = typeof value === "string" ? value : "expense";
+  return TRANSACTION_TYPES.includes(type as (typeof TRANSACTION_TYPES)[number])
+    ? type
+    : "expense";
+}
+
+function readPaymentStatus(value: FormDataEntryValue | null) {
+  const status = typeof value === "string" ? value : "planned";
+  return PAYMENT_STATUSES.includes(status as (typeof PAYMENT_STATUSES)[number])
+    ? status
+    : "planned";
+}
+
+function readAmount(value: FormDataEntryValue | null) {
+  const amount = Number(typeof value === "string" ? value.replace(",", ".") : value);
+  return Number.isFinite(amount) && amount >= 0 ? amount : null;
+}
+
+async function getCurrentUserId() {
+  const supabase = await createClient();
+  const {
+    data: { user },
+    error,
+  } = await supabase.auth.getUser();
+
+  if (error || !user) {
+    throw new Error("Finans işlemi için giriş yapmış kullanıcı bulunamadı.");
+  }
+
+  return { supabase, userId: user.id };
+}
+
+function readPayload(formData: FormData) {
+  return {
+    type: readType(formData.get("type")),
+    amount: readAmount(formData.get("amount")),
+    currency: cleanText(formData.get("currency")) || "USD",
+    transaction_date: cleanText(formData.get("transaction_date")) || new Date().toISOString().slice(0, 10),
+    category: cleanText(formData.get("category")),
+    payment_status: readPaymentStatus(formData.get("payment_status")),
+    client_id: cleanText(formData.get("client_id")),
+    project_id: cleanText(formData.get("project_id")),
+    description: cleanText(formData.get("description")),
+  };
+}
+
+export async function createFinanceTransactionRecord(formData: FormData) {
+  const { supabase, userId } = await getCurrentUserId();
+  const payload = readPayload(formData);
+
+  if (payload.amount === null) {
+    throw new Error("Tutar zorunludur.");
+  }
+
+  const { error } = await supabase.from("finance_transactions").insert({
+    user_id: userId,
+    ...payload,
+  });
+
+  if (error) {
+    throw new Error(`Finans işlemi eklenemedi: ${error.message}`);
+  }
+
+  revalidatePath("/finance");
+}
+
+export async function updateFinanceTransactionRecord(formData: FormData) {
+  const { supabase, userId } = await getCurrentUserId();
+  const id = cleanText(formData.get("id"));
+  const payload = readPayload(formData);
+
+  if (!id || payload.amount === null) {
+    throw new Error("Finans işlemini güncellemek için kayıt kimliği ve tutar zorunludur.");
+  }
+
+  const { error } = await supabase
+    .from("finance_transactions")
+    .update(payload)
+    .eq("id", id)
+    .eq("user_id", userId);
+
+  if (error) {
+    throw new Error(`Finans işlemi güncellenemedi: ${error.message}`);
+  }
+
+  revalidatePath("/finance");
+}
+
+export async function deleteFinanceTransactionRecord(formData: FormData) {
+  const { supabase, userId } = await getCurrentUserId();
+  const id = cleanText(formData.get("id"));
+
+  if (!id) {
+    throw new Error("Silinecek finans işlemi bulunamadı.");
+  }
+
+  const { error } = await supabase
+    .from("finance_transactions")
+    .delete()
+    .eq("id", id)
+    .eq("user_id", userId);
+
+  if (error) {
+    throw new Error(`Finans işlemi silinemedi: ${error.message}`);
+  }
+
+  revalidatePath("/finance");
+}