diff --git a/src/components/admin/enrollment-manager.tsx b/src/components/admin/enrollment-manager.tsx
index dc82aad..49d3417 100644
--- a/src/components/admin/enrollment-manager.tsx
+++ b/src/components/admin/enrollment-manager.tsx
@@ -3,7 +3,7 @@
 import { useState, useTransition } from "react";
 import { Input } from "@/components/ui/input";
 import { Button } from "@/components/ui/button";
-import { grantAccess, revokeAccess } from "@/app/admin/courses/[courseId]/actions";
+import { grantAccess, revokeAccess } from "@/lib/actions/course-actions";
 
 interface Student {
   id: string;
diff --git a/src/components/admin/sortable-lessons.tsx b/src/components/admin/sortable-lessons.tsx
index b72e504..4e14d01 100644
--- a/src/components/admin/sortable-lessons.tsx
+++ b/src/components/admin/sortable-lessons.tsx
@@ -25,7 +25,7 @@ import {
   reorderLessons,
   toggleLessonPublished,
   moveLessonToModule,
-} from "@/app/admin/courses/[courseId]/modules/[moduleId]/actions";
+} from "@/lib/actions/module-actions";
 
 interface Lesson {
   id: string;
diff --git a/src/components/admin/sortable-modules.tsx b/src/components/admin/sortable-modules.tsx
index 07d23d4..c64fadb 100644
--- a/src/components/admin/sortable-modules.tsx
+++ b/src/components/admin/sortable-modules.tsx
@@ -17,7 +17,7 @@ import {
 } from "@dnd-kit/sortable";
 import { CSS } from "@dnd-kit/utilities";
 import Link from "next/link";
-import { createModule, deleteModule, updateModule, reorderModules } from "@/app/admin/courses/[courseId]/actions";
+import { createModule, deleteModule, updateModule, reorderModules } from "@/lib/actions/course-actions";
 
 interface Module {
   id: string;
diff --git a/src/components/admin/user-enrollment-manager.tsx b/src/components/admin/user-enrollment-manager.tsx
index aa73085..ed5edd0 100644
--- a/src/components/admin/user-enrollment-manager.tsx
+++ b/src/components/admin/user-enrollment-manager.tsx
@@ -3,7 +3,7 @@
 import { useState, useTransition } from "react";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
-import { bulkGrantAccess, revokeUserAccess } from "@/app/admin/users/[userId]/actions";
+import { bulkGrantAccess, revokeUserAccess } from "@/lib/actions/user-actions";
 
 interface Course {
   id: string;
diff --git a/src/components/student/homework-section.tsx b/src/components/student/homework-section.tsx
index c750d77..7eecf7c 100644
--- a/src/components/student/homework-section.tsx
+++ b/src/components/student/homework-section.tsx
@@ -1,7 +1,7 @@
 "use client";
 
 import { useState, useTransition } from "react";
-import { submitHomework } from "@/app/(student)/courses/[slug]/lessons/[lessonId]/homework-actions";
+import { submitHomework } from "@/lib/actions/student-actions";
 import { AudioRecorder } from "@/components/curator/audio-recorder";
 
 interface HWFile { name: string; url: string; size: number }
diff --git a/src/components/student/lesson-comments.tsx b/src/components/student/lesson-comments.tsx
index 742749f..eb1229e 100644
--- a/src/components/student/lesson-comments.tsx
+++ b/src/components/student/lesson-comments.tsx
@@ -1,7 +1,7 @@
 "use client";
 
 import { useState, useTransition } from "react";
-import { addComment, deleteComment } from "@/app/(student)/courses/[slug]/lessons/[lessonId]/comment-actions";
+import { addComment, deleteComment } from "@/lib/actions/student-actions";
 
 type Comment = {
   id: string;
diff --git a/src/components/student/lesson-complete-button.tsx b/src/components/student/lesson-complete-button.tsx
index 8bb48fe..5c820c0 100644
--- a/src/components/student/lesson-complete-button.tsx
+++ b/src/components/student/lesson-complete-button.tsx
@@ -2,7 +2,7 @@
 
 import { useTransition } from "react";
 import { Check } from "lucide-react";
-import { toggleLessonProgress } from "@/app/(student)/courses/[slug]/lessons/[lessonId]/actions";
+import { toggleLessonProgress } from "@/lib/actions/student-actions";
 
 export function LessonCompleteButton({
   lessonId,
diff --git a/src/lib/actions/course-actions.ts b/src/lib/actions/course-actions.ts
new file mode 100644
index 0000000..34ec2fd
--- /dev/null
+++ b/src/lib/actions/course-actions.ts
@@ -0,0 +1,103 @@
+"use server";
+
+import { prisma } from "@/lib/prisma";
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { revalidatePath } from "next/cache";
+import { redirect } from "next/navigation";
+import { sendCourseAccessEmail } from "@/lib/email";
+
+async function requireAdmin() {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session || session.user.role !== "admin") throw new Error("Forbidden");
+  return session;
+}
+
+// ── Modules ──────────────────────────────────────────────────────────────────
+
+export async function createModule(courseId: string, formData: FormData) {
+  await requireAdmin();
+  const title = formData.get("title") as string;
+  const count = await prisma.module.count({ where: { courseId } });
+  const mod = await prisma.module.create({ data: { courseId, title, order: count } });
+  revalidatePath(`/admin/courses/${courseId}`);
+  redirect(`/admin/courses/${courseId}/modules/${mod.id}`);
+}
+
+export async function updateModule(moduleId: string, courseId: string, formData: FormData) {
+  await requireAdmin();
+  const title = formData.get("title") as string;
+  const description = (formData.get("description") as string | null)?.trim() || null;
+  await prisma.module.update({ where: { id: moduleId }, data: { title, description } });
+  revalidatePath(`/admin/courses/${courseId}`);
+}
+
+export async function deleteModule(moduleId: string, courseId: string) {
+  await requireAdmin();
+  await prisma.module.delete({ where: { id: moduleId } });
+  revalidatePath(`/admin/courses/${courseId}`);
+}
+
+export async function reorderModules(courseId: string, orderedIds: string[]) {
+  await requireAdmin();
+  await Promise.all(
+    orderedIds.map((id, index) =>
+      prisma.module.update({ where: { id }, data: { order: index } })
+    )
+  );
+  revalidatePath(`/admin/courses/${courseId}`);
+}
+
+// ── Enrollment ───────────────────────────────────────────────────────────────
+
+export async function grantAccess(
+  courseId: string,
+  userId: string,
+  expiresAt?: string | null,
+  note?: string
+) {
+  const session = await requireAdmin();
+  await prisma.courseEnrollment.upsert({
+    where: { userId_courseId: { userId, courseId } },
+    update: { expiresAt: expiresAt ? new Date(expiresAt) : null },
+    create: { userId, courseId, expiresAt: expiresAt ? new Date(expiresAt) : null },
+  });
+  await prisma.accessLog.create({
+    data: {
+      courseId,
+      userId,
+      action: "granted",
+      method: "manual",
+      grantedById: session.user.id,
+      note: note || null,
+    },
+  });
+
+  const [user, course] = await Promise.all([
+    prisma.user.findUnique({ where: { id: userId }, select: { email: true, name: true } }),
+    prisma.course.findUnique({ where: { id: courseId }, select: { title: true } }),
+  ]);
+  if (user && course) {
+    await sendCourseAccessEmail(user.email, user.name, course.title);
+  }
+
+  revalidatePath(`/admin/courses/${courseId}`);
+}
+
+export async function revokeAccess(courseId: string, userId: string, note?: string) {
+  const session = await requireAdmin();
+  await prisma.courseEnrollment.delete({
+    where: { userId_courseId: { userId, courseId } },
+  });
+  await prisma.accessLog.create({
+    data: {
+      courseId,
+      userId,
+      action: "revoked",
+      method: "manual",
+      grantedById: session.user.id,
+      note: note || null,
+    },
+  });
+  revalidatePath(`/admin/courses/${courseId}`);
+}
diff --git a/src/lib/actions/module-actions.ts b/src/lib/actions/module-actions.ts
new file mode 100644
index 0000000..6ef6e32
--- /dev/null
+++ b/src/lib/actions/module-actions.ts
@@ -0,0 +1,89 @@
+"use server";
+
+import { prisma } from "@/lib/prisma";
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { revalidatePath } from "next/cache";
+import { redirect } from "next/navigation";
+
+async function requireAdmin() {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session || session.user.role !== "admin") throw new Error("Forbidden");
+}
+
+export async function createLesson(moduleId: string, courseId: string, formData: FormData) {
+  await requireAdmin();
+  const title = formData.get("title") as string;
+  const kinescopeId = (formData.get("kinescopeId") as string | null)?.trim() || null;
+  const count = await prisma.lesson.count({ where: { moduleId } });
+  const lesson = await prisma.lesson.create({
+    data: { moduleId, title, kinescopeId, order: count },
+  });
+  revalidatePath(`/admin/courses/${courseId}/modules/${moduleId}`);
+  redirect(`/admin/courses/${courseId}/modules/${moduleId}/lessons/${lesson.id}`);
+}
+
+export async function updateLesson(lessonId: string, courseId: string, moduleId: string, formData: FormData) {
+  await requireAdmin();
+  const title = formData.get("title") as string;
+  await prisma.lesson.update({ where: { id: lessonId }, data: { title } });
+  revalidatePath(`/admin/courses/${courseId}/modules/${moduleId}`);
+}
+
+export async function deleteLesson(lessonId: string, courseId: string, moduleId: string) {
+  await requireAdmin();
+  await prisma.lesson.delete({ where: { id: lessonId } });
+  revalidatePath(`/admin/courses/${courseId}/modules/${moduleId}`);
+}
+
+export async function reorderLessons(moduleId: string, courseId: string, orderedIds: string[]) {
+  await requireAdmin();
+  await Promise.all(
+    orderedIds.map((id, index) =>
+      prisma.lesson.update({ where: { id }, data: { order: index } })
+    )
+  );
+  revalidatePath(`/admin/courses/${courseId}/modules/${moduleId}`);
+}
+
+export async function toggleLessonPublished(
+  lessonId: string,
+  courseId: string,
+  moduleId: string,
+  currentValue: boolean
+) {
+  await requireAdmin();
+  await prisma.lesson.update({
+    where: { id: lessonId },
+    data: { published: !currentValue },
+  });
+  revalidatePath(`/admin/courses/${courseId}/modules/${moduleId}`);
+  revalidatePath(`/admin/courses/${courseId}`);
+}
+
+export async function moveLessonToModule(
+  lessonId: string,
+  targetModuleId: string,
+  courseId: string,
+  sourceModuleId: string
+) {
+  await requireAdmin();
+  const target = await prisma.module.findFirst({
+    where: { id: targetModuleId, courseId },
+  });
+  if (!target) throw new Error("Module not found");
+
+  const maxOrder = await prisma.lesson.aggregate({
+    where: { moduleId: targetModuleId },
+    _max: { order: true },
+  });
+
+  await prisma.lesson.update({
+    where: { id: lessonId },
+    data: { moduleId: targetModuleId, order: (maxOrder._max.order ?? -1) + 1 },
+  });
+
+  revalidatePath(`/admin/courses/${courseId}/modules/${sourceModuleId}`);
+  revalidatePath(`/admin/courses/${courseId}/modules/${targetModuleId}`);
+  revalidatePath(`/admin/courses/${courseId}`);
+}
diff --git a/src/lib/actions/student-actions.ts b/src/lib/actions/student-actions.ts
new file mode 100644
index 0000000..0770815
--- /dev/null
+++ b/src/lib/actions/student-actions.ts
@@ -0,0 +1,152 @@
+"use server";
+
+import { prisma } from "@/lib/prisma";
+import { auth } from "@/lib/auth";
+import { headers } from "next/headers";
+import { revalidatePath } from "next/cache";
+import { sendHomeworkSubmittedEmail } from "@/lib/email";
+
+// ── Lesson Progress ───────────────────────────────────────────────────────────
+
+export async function toggleLessonProgress(lessonId: string, slug: string) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) throw new Error("Unauthorized");
+
+  const existing = await prisma.lessonProgress.findUnique({
+    where: { userId_lessonId: { userId: session.user.id, lessonId } },
+  });
+
+  if (existing) {
+    await prisma.lessonProgress.delete({
+      where: { userId_lessonId: { userId: session.user.id, lessonId } },
+    });
+  } else {
+    await prisma.lessonProgress.create({
+      data: { userId: session.user.id, lessonId },
+    });
+  }
+
+  revalidatePath(`/courses/${slug}/lessons/${lessonId}`);
+  revalidatePath(`/courses/${slug}`);
+  revalidatePath("/dashboard");
+}
+
+// ── Homework ──────────────────────────────────────────────────────────────────
+
+interface HomeworkFile {
+  name: string;
+  url: string;
+  size: number;
+}
+
+export async function submitHomework(
+  homeworkId: string,
+  slug: string,
+  lessonId: string,
+  text: string,
+  files: HomeworkFile[],
+  audioUrl?: string | null
+) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) throw new Error("Unauthorized");
+
+  const existing = await prisma.homeworkSubmission.findFirst({
+    where: { homeworkId, userId: session.user.id },
+    include: { feedbacks: true },
+  });
+
+  if (existing?.feedbacks && existing.feedbacks.length > 0) {
+    throw new Error("Работа уже проверена");
+  }
+
+  let submissionId: string;
+  if (existing) {
+    const updated = await prisma.homeworkSubmission.update({
+      where: { id: existing.id },
+      data: { text, files: files as object[], audioUrl: audioUrl ?? null, submittedAt: new Date() },
+    });
+    submissionId = updated.id;
+  } else {
+    const created = await prisma.homeworkSubmission.create({
+      data: { homeworkId, userId: session.user.id, text, files: files as object[], audioUrl: audioUrl ?? null },
+    });
+    submissionId = created.id;
+
+    const [lesson, admins] = await Promise.all([
+      prisma.homework.findUnique({
+        where: { id: homeworkId },
+        include: { lesson: { select: { title: true } } },
+      }),
+      prisma.user.findMany({
+        where: { role: { in: ["admin", "curator"] } },
+        select: { email: true, name: true },
+      }),
+    ]);
+    if (lesson) {
+      await Promise.all(
+        admins.map((a) =>
+          sendHomeworkSubmittedEmail(a.email, a.name, session.user.name, lesson.lesson.title, submissionId)
+        )
+      );
+    }
+  }
+
+  revalidatePath(`/courses/${slug}/lessons/${lessonId}`);
+}
+
+// ── Comments ──────────────────────────────────────────────────────────────────
+
+export async function addComment(lessonId: string, slug: string, text: string) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) throw new Error("Unauthorized");
+
+  const trimmed = text.trim();
+  if (!trimmed || trimmed.length > 2000) throw new Error("Invalid text");
+
+  const lesson = await prisma.lesson.findUnique({
+    where: { id: lessonId },
+    select: { module: { select: { course: { select: { id: true } } } } },
+  });
+  if (!lesson) throw new Error("Lesson not found");
+
+  const isAdmin = session.user.role === "admin";
+  if (!isAdmin) {
+    const enrollment = await prisma.courseEnrollment.findUnique({
+      where: {
+        userId_courseId: {
+          userId: session.user.id,
+          courseId: lesson.module.course.id,
+        },
+      },
+    });
+    if (!enrollment) throw new Error("Not enrolled");
+    if (enrollment.expiresAt && enrollment.expiresAt < new Date()) throw new Error("Access expired");
+  }
+
+  await prisma.lessonComment.create({
+    data: { lessonId, userId: session.user.id, text: trimmed },
+  });
+
+  revalidatePath(`/courses/${slug}/lessons/${lessonId}`);
+}
+
+export async function deleteComment(commentId: string, lessonId: string, slug: string) {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session) throw new Error("Unauthorized");
+
+  const comment = await prisma.lessonComment.findUnique({ where: { id: commentId } });
+  if (!comment) throw new Error("Not found");
+
+  const canDelete =
+    comment.userId === session.user.id ||
+    session.user.role === "curator" ||
+    session.user.role === "admin";
+  if (!canDelete) throw new Error("Forbidden");
+
+  await prisma.lessonComment.update({
+    where: { id: commentId },
+    data: { deleted: true },
+  });
+
+  revalidatePath(`/courses/${slug}/lessons/${lessonId}`);
+}
diff --git a/src/lib/actions/user-actions.ts b/src/lib/actions/user-actions.ts
new file mode 100644
index 0000000..b96a0fa
--- /dev/null
+++ b/src/lib/actions/user-actions.ts
@@ -0,0 +1,59 @@
+"use server";
+
+import { prisma } from "@/lib/prisma";
+import { headers } from "next/headers";
+import { auth } from "@/lib/auth";
+import { revalidatePath } from "next/cache";
+
+async function requireAdmin() {
+  const session = await auth.api.getSession({ headers: await headers() });
+  if (!session || session.user.role !== "admin") throw new Error("Forbidden");
+  return session;
+}
+
+export async function bulkGrantAccess(
+  userId: string,
+  courseIds: string[],
+  expiresAt?: string | null
+) {
+  const session = await requireAdmin();
+  const expiry = expiresAt ? new Date(expiresAt) : null;
+
+  await Promise.all(
+    courseIds.map(async (courseId) => {
+      await prisma.courseEnrollment.upsert({
+        where: { userId_courseId: { userId, courseId } },
+        update: { expiresAt: expiry },
+        create: { userId, courseId, expiresAt: expiry },
+      });
+      await prisma.accessLog.create({
+        data: {
+          courseId,
+          userId,
+          action: "granted",
+          method: "bulk",
+          grantedById: session.user.id,
+        },
+      });
+    })
+  );
+
+  revalidatePath(`/admin/users/${userId}`);
+}
+
+export async function revokeUserAccess(userId: string, courseId: string) {
+  const session = await requireAdmin();
+  await prisma.courseEnrollment.delete({
+    where: { userId_courseId: { userId, courseId } },
+  });
+  await prisma.accessLog.create({
+    data: {
+      courseId,
+      userId,
+      action: "revoked",
+      method: "manual",
+      grantedById: session.user.id,
+    },
+  });
+  revalidatePath(`/admin/users/${userId}`);
+}