feat: implement client portal project view with revision request functionality and layout structure

app/portal/projects/[id]/actions.ts

@@ -0,0 +1,36 @@
+"use server";
+
+import { createClient } from "@/lib/supabase/server";
+import { revalidatePath } from "next/cache";
+
+export async function createRevisionRequest(projectId: string, clientId: string, formData: FormData) {
+  const supabase = await createClient();
+  const { data: { user } } = await supabase.auth.getUser();
+
+  if (!user) {
+    return { error: "Oturum süresi dolmuş." };
+  }
+
+  const description = formData.get("description") as string;
+
+  if (!description?.trim()) {
+    return { error: "Revizyon açıklaması boş olamaz." };
+  }
+
+  const { error } = await supabase
+    .from("project_revisions")
+    .insert({
+      project_id: projectId,
+      client_id: clientId,
+      requested_by: user.id,
+      description,
+      status: "pending"
+    });
+
+  if (error) {
+    return { error: error.message };
+  }
+
+  revalidatePath(`/portal/projects/${projectId}`);
+  return { success: true };
+}