diff --git a/docker-compose.yml b/docker-compose.yml
index aa300bd..eee1ca1 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -11,7 +11,7 @@ services:
       - ./data/db:/var/lib/postgresql/data
     networks:
       - proxy
-    ports: # !сменить внешний порт перед использованием!
+    ports: # !только локальный тест!
       - 5432:5432
     env_file:
       - ./.env
@@ -31,23 +31,6 @@ services:
       timeout: 5s
       retries: 5
 
-  replication-setup:
-      image: postgres:17-alpine
-      container_name: replication-setup
-      restart: "no"
-      networks:
-          - proxy
-      env_file:
-          - ./.env
-      volumes:
-          - ./setup-replication.sh:/setup-replication.sh
-      entrypoint: ["/bin/sh", "/setup-replication.sh"]
-      depends_on:
-          api:
-              condition: service_started
-          db:
-              condition: service_healthy
-
   llm:
       image: ollama/ollama:latest
       container_name: llm
diff --git a/example-docker.env b/example-docker.env
index 5ad23bc..7ff5b73 100644
--- a/example-docker.env
+++ b/example-docker.env
@@ -4,9 +4,6 @@ POSTGRES_PORT=5432
 POSTGRES_USER=postgres
 POSTGRES_PASSWORD=postgres
 POSTGRES_DB=lib
-REMOTE_HOST=
-REMOTE_PORT=
-NODE_ID=
 
 # Ollama
 OLLAMA_URL="http://llm:11434"
diff --git a/init-replication.sql b/init-replication.sql
deleted file mode 100644
index b2b3ee8..0000000
--- a/init-replication.sql
+++ /dev/null
@@ -1,4 +0,0 @@
-CREATE PUBLICATION all_tables_pub FOR ALL TABLES;
-
-ALTER SYSTEM SET password_encryption = 'scram-sha-256';
-SELECT pg_reload_conf();
diff --git a/library_service/main.py b/library_service/main.py
index 9ba4581..0c4f8d4 100644
--- a/library_service/main.py
+++ b/library_service/main.py
@@ -73,15 +73,20 @@ app = get_app(lifespan)
 
 @app.exception_handler(status.HTTP_404_NOT_FOUND)
 async def custom_not_found_handler(request: Request, exc: HTTPException):
-    path = request.url.path
+    if exc.detail == "Not Found":
+        path = request.url.path
 
-    if path.startswith("/api"):
-        return JSONResponse(
-            status_code=status.HTTP_404_NOT_FOUND,
-            content={"detail": "API endpoint not found", "path": path},
-        )
+        if path.startswith("/api/"):
+            return JSONResponse(
+                status_code=status.HTTP_404_NOT_FOUND,
+                content={"detail": "API endpoint not found", "path": path},
+            )
+        return await unknown(request, app)
 
-    return await unknown(request, app)
+    return JSONResponse(
+        status_code=exc.status_code,
+        content={"detail": exc.detail},
+    )
 
 
 @app.middleware("http")
diff --git a/library_service/routers/auth.py b/library_service/routers/auth.py
index 5b68ae7..6becbea 100644
--- a/library_service/routers/auth.py
+++ b/library_service/routers/auth.py
@@ -287,7 +287,8 @@ def enable_2fa(
 
     if not current_user.totp_secret:
         raise HTTPException(
-            status_code=status.HTTP_400_BAD_REQUEST, detail="Secret key not generated"
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Secret key not generated",
         )
 
     if not verify_totp_code(secret, data.code):
@@ -299,7 +300,8 @@ def enable_2fa(
     decrypted = cipher.decrypt(base64.b64decode(current_user.totp_secret.encode()))
     if secret != decrypted.decode():
         raise HTTPException(
-            status_code=status.HTTP_400_BAD_REQUEST, detail="Incorret secret"
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Incorret secret",
         )
 
     current_user.is_2fa_enabled = True
diff --git a/library_service/routers/authors.py b/library_service/routers/authors.py
index f3b1670..bb4dbd7 100644
--- a/library_service/routers/authors.py
+++ b/library_service/routers/authors.py
@@ -67,7 +67,8 @@ def get_author(
     author = session.get(Author, author_id)
     if not author:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="Author not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Author not found",
         )
 
     books = session.exec(
@@ -98,7 +99,8 @@ def update_author(
     db_author = session.get(Author, author_id)
     if not db_author:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="Author not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Author not found",
         )
 
     update_data = author.model_dump(exclude_unset=True)
@@ -125,7 +127,8 @@ def delete_author(
     author = session.get(Author, author_id)
     if not author:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="Author not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Author not found",
         )
 
     author_read = AuthorRead(**author.model_dump())
diff --git a/library_service/routers/books.py b/library_service/routers/books.py
index 2bfbe4a..528676a 100644
--- a/library_service/routers/books.py
+++ b/library_service/routers/books.py
@@ -1,23 +1,20 @@
 """Модуль работы с книгами"""
-from library_service.services import transcode_image
-import shutil
-from uuid import uuid4
-
-from pydantic import Field
 from typing_extensions import Annotated
-
-from sqlalchemy.orm import selectinload, defer
-
-from sqlalchemy import text, case, distinct
+from uuid import uuid4
+import shutil
 
 from datetime import datetime, timezone
 from typing import List
 
 from fastapi import APIRouter, Depends, HTTPException, Path, Query, status, UploadFile, File
 from ollama import Client
+from pydantic import Field
+from sqlalchemy import text, case, distinct
+from sqlalchemy.orm import selectinload, defer
 from sqlmodel import Session, select, col, func
 
 from library_service.auth import RequireStaff
+from library_service.services import transcode_image
 from library_service.settings import get_session, OLLAMA_URL, BOOKS_PREVIEW_DIR
 from library_service.models.enums import BookStatus
 from library_service.models.db import (
@@ -139,7 +136,8 @@ def create_book(
     session.commit()
     session.refresh(db_book)
 
-    book_data = db_book.model_dump(exclude={"embedding", "preview_id"})
+    book_dict = {k: v for k, v in db_book.__dict__.items() if not k.startswith('_')}
+    book_data = {k: v for k, v in book_dict.items() if k not in {"embedding", "preview_id"}}
     book_data["preview_urls"] = {
         "png": f"/static/books/{db_book.preview_id}.png",
         "jpeg": f"/static/books/{db_book.preview_id}.jpg",
@@ -160,12 +158,17 @@ def read_books(session: Session = Depends(get_session)):
 
     books_data = []
     for book in books:
-        book_data = book.model_dump(exclude={"embedding", "preview_id"})
+        book = book[0]
+        book_dict = dict(book)
+
+        book_data = {k: v for k, v in book_dict.items() if k not in {"embedding", "preview_id"}}
+
         book_data["preview_urls"] = {
             "png": f"/static/books/{book.preview_id}.png",
             "jpeg": f"/static/books/{book.preview_id}.jpg",
             "webp": f"/static/books/{book.preview_id}.webp",
         } if book.preview_id else {}
+
         books_data.append(book_data)
 
     return BookList(
@@ -188,7 +191,8 @@ def get_book(
     book = session.get(Book, book_id)
     if not book:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="Book not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Book not found",
         )
 
     authors = session.scalars(
@@ -203,7 +207,8 @@ def get_book(
 
     genre_reads = [GenreRead(**genre.model_dump()) for genre in genres]
 
-    book_data = book.model_dump(exclude={"embedding", "preview_id"})
+    book_dict = {k: v for k, v in book.__dict__.items() if not k.startswith('_')}
+    book_data = {k: v for k, v in book_dict.items() if k not in {"embedding", "preview_id"}}
     book_data["preview_urls"] = {
         "png": f"/static/books/{book.preview_id}.png",
         "jpeg": f"/static/books/{book.preview_id}.jpg",
@@ -231,7 +236,8 @@ def update_book(
     db_book = session.get(Book, book_id)
     if not db_book:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="Book not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Book not found",
         )
 
     if book_update.status is not None:
@@ -292,7 +298,8 @@ def delete_book(
     book = session.get(Book, book_id)
     if not book:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="Book not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Book not found",
         )
     book_read = BookRead(
         id=(book.id or 0),
@@ -313,10 +320,16 @@ async def upload_book_preview(
     session: Session = Depends(get_session)
 ):
     if not (file.content_type or "").startswith("image/"):
-        raise HTTPException(status.HTTP_415_UNSUPPORTED_MEDIA_TYPE, "Image required")
+        raise HTTPException(
+            status_code=status.HTTP_415_UNSUPPORTED_MEDIA_TYPE,
+            detail="Image required",
+        )
 
     if (file.size or 0) > 32 * 1024 * 1024:
-        raise HTTPException(status.HTTP_413_REQUEST_ENTITY_TOO_LARGE, "File larger than 10 MB")
+        raise HTTPException(
+            status_code=status.HTTP_413_REQUEST_ENTITY_TOO_LARGE,
+            detail="File larger than 10 MB",
+        )
 
     file_uuid= uuid4()
     tmp_path = BOOKS_PREVIEW_DIR / f"{file_uuid}.upload"
@@ -327,7 +340,10 @@ async def upload_book_preview(
     book = session.get(Book, book_id)
     if not book:
         tmp_path.unlink()
-        raise HTTPException(status.HTTP_404_NOT_FOUND, "Book not found")
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Book not found",
+        )
 
     transcode_image(tmp_path)
     tmp_path.unlink()
diff --git a/library_service/routers/cap.py b/library_service/routers/cap.py
index bb83f51..bdfb145 100644
--- a/library_service/routers/cap.py
+++ b/library_service/routers/cap.py
@@ -27,11 +27,13 @@ async def challenge(request: Request, ip: str = Depends(get_ip)):
     """Возвращает задачу capjs"""
     if challenges_by_ip[ip] >= MAX_CHALLENGES_PER_IP:
         raise HTTPException(
-            status_code=status.HTTP_429_TOO_MANY_REQUESTS, detail="Too many challenges"
+            status_code=status.HTTP_429_TOO_MANY_REQUESTS,
+            detail="Too many challenges",
         )
     if len(active_challenges) >= MAX_TOTAL_CHALLENGES:
         raise HTTPException(
-            status_code=status.HTTP_503_SERVICE_UNAVAILABLE, detail="Server busy"
+            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
+            detail="Server busy",
         )
 
     token = secrets.token_hex(25)
@@ -60,17 +62,22 @@ async def redeem(request: Request, payload: dict, ip: str = Depends(get_ip)):
 
     if token not in active_challenges:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="Invalid challenge"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Invalid challenge",
         )
 
     ch = active_challenges.pop(token)
     challenges_by_ip[ch["ip"]] -= 1
 
     if now_ms() > ch["expires"]:
-        raise HTTPException(status_code=status.HTTP_410_GONE, detail="Expired")
+        raise HTTPException(
+            status_code=status.HTTP_410_GONE,
+            detail="Expired"
+        )
     if len(solutions) < ch["c"]:
         raise HTTPException(
-            status_code=status.HTTP_400_BAD_REQUEST, detail="Bad solutions"
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Bad solutions",
         )
 
     def verify(i: int) -> bool:
@@ -84,7 +91,8 @@ async def redeem(request: Request, payload: dict, ip: str = Depends(get_ip)):
     )
     if not all(results):
         raise HTTPException(
-            status_code=status.HTTP_400_BAD_REQUEST, detail="Invalid solution"
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Invalid solution",
         )
 
     r_token = ch["redeem_token"]
diff --git a/library_service/routers/genres.py b/library_service/routers/genres.py
index be0a134..2e06999 100644
--- a/library_service/routers/genres.py
+++ b/library_service/routers/genres.py
@@ -66,7 +66,8 @@ def get_genre(
     genre = session.get(Genre, genre_id)
     if not genre:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="Genre not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Genre not found",
         )
 
     books = session.exec(
@@ -97,7 +98,8 @@ def update_genre(
     db_genre = session.get(Genre, genre_id)
     if not db_genre:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="Genre not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Genre not found",
         )
 
     update_data = genre.model_dump(exclude_unset=True)
@@ -124,7 +126,8 @@ def delete_genre(
     genre = session.get(Genre, genre_id)
     if not genre:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="Genre not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Genre not found",
         )
 
     genre_read = GenreRead(**genre.model_dump())
diff --git a/library_service/routers/loans.py b/library_service/routers/loans.py
index 48e3df5..1ac1455 100644
--- a/library_service/routers/loans.py
+++ b/library_service/routers/loans.py
@@ -41,7 +41,8 @@ def create_loan(
     book = session.get(Book, loan.book_id)
     if not book:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="Book not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Book not found",
         )
 
     if book.status != BookStatus.ACTIVE:
@@ -53,7 +54,8 @@ def create_loan(
     target_user = session.get(User, loan.user_id)
     if not target_user:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="User not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="User not found",
         )
 
     db_loan = BookUserLink(
@@ -253,14 +255,16 @@ def get_loan(
 
     if not loan:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="Loan not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Loan not found",
         )
 
     is_staff = is_user_staff(current_user)
 
     if not is_staff and loan.user_id != current_user.id:
         raise HTTPException(
-            status_code=status.HTTP_403_FORBIDDEN, detail="Access denied to this loan"
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="Access denied to this loan",
         )
 
     return LoanRead(**loan.model_dump())
@@ -282,7 +286,8 @@ def update_loan(
     db_loan = session.get(BookUserLink, loan_id)
     if not db_loan:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="Loan not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Loan not found",
         )
 
     is_staff = is_user_staff(current_user)
@@ -296,7 +301,8 @@ def update_loan(
     book = session.get(Book, db_loan.book_id)
     if not book:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="Book not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Book not found",
         )
 
     if loan_update.user_id is not None:
@@ -308,7 +314,8 @@ def update_loan(
         new_user = session.get(User, loan_update.user_id)
         if not new_user:
             raise HTTPException(
-                status_code=status.HTTP_404_NOT_FOUND, detail="User not found"
+                status_code=status.HTTP_404_NOT_FOUND,
+                detail="User not found",
             )
         db_loan.user_id = loan_update.user_id
 
@@ -347,18 +354,21 @@ def confirm_loan(
     loan = session.get(BookUserLink, loan_id)
     if not loan:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="Loan not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Loan not found",
         )
 
     if loan.returned_at:
         raise HTTPException(
-            status_code=status.HTTP_400_BAD_REQUEST, detail="Loan is already returned"
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Loan is already returned",
         )
 
     book = session.get(Book, loan.book_id)
     if not book:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="Book not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Book not found",
         )
 
     if book.status not in [BookStatus.RESERVED, BookStatus.ACTIVE]:
@@ -392,12 +402,14 @@ def return_loan(
     loan = session.get(BookUserLink, loan_id)
     if not loan:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="Loan not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Loan not found",
         )
 
     if loan.returned_at:
         raise HTTPException(
-            status_code=status.HTTP_400_BAD_REQUEST, detail="Loan is already returned"
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Loan is already returned",
         )
 
     loan.returned_at = datetime.now(timezone.utc)
@@ -429,7 +441,8 @@ def delete_loan(
     loan = session.get(BookUserLink, loan_id)
     if not loan:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="Loan not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Loan not found",
         )
 
     is_staff = is_user_staff(current_user)
@@ -499,7 +512,8 @@ def issue_book_directly(
     book = session.get(Book, loan.book_id)
     if not book:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="Book not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Book not found",
         )
 
     if book.status != BookStatus.ACTIVE:
@@ -511,7 +525,8 @@ def issue_book_directly(
     target_user = session.get(User, loan.user_id)
     if not target_user:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="User not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="User not found",
         )
 
     db_loan = BookUserLink(
diff --git a/library_service/routers/misc.py b/library_service/routers/misc.py
index 7fde233..0eac8a5 100644
--- a/library_service/routers/misc.py
+++ b/library_service/routers/misc.py
@@ -56,8 +56,14 @@ async def create_genre(request: Request, app=Depends(lambda: get_app())):
 
 
 @router.get("/genre/{genre_id}/edit", include_in_schema=False)
-async def edit_genre(request: Request, genre_id: int, app=Depends(lambda: get_app())):
+async def edit_genre(request: Request, genre_id: str, app=Depends(lambda: get_app())):
     """Рендерит страницу редактирования жанра"""
+
+    try:
+        assert int(genre_id) > 0
+    except:
+        return await unknown(request, app)
+
     return templates.TemplateResponse(request, "edit_genre.html", get_info(app) | {"request": request, "title": "LiB - Редактировать жанр", "id": genre_id})
 
 
@@ -74,15 +80,32 @@ async def create_author(request: Request, app=Depends(lambda: get_app())):
 
 
 @router.get("/author/{author_id}/edit", include_in_schema=False)
-async def edit_author(request: Request, author_id: int, app=Depends(lambda: get_app())):
+async def edit_author(request: Request, author_id: str, app=Depends(lambda: get_app()), session=Depends(get_session)):
     """Рендерит страницу редактирования автора"""
-    return templates.TemplateResponse(request, "edit_author.html", get_info(app) | {"request": request, "title": "LiB - Редактировать автора", "id": author_id})
+
+    try:
+        author = session.get(Author, int(author_id))
+        assert author is not None
+    except:
+        return await unknown(request, app)
+
+    return templates.TemplateResponse(request, "edit_author.html", get_info(app) | {"request": request, "title": f"LiB - Редактировать автора \"{author.name}\"", "id": author_id})
 
 
 @router.get("/author/{author_id}", include_in_schema=False)
-async def author(request: Request, author_id: int, app=Depends(lambda: get_app())):
+async def author(request: Request, author_id: str, app=Depends(lambda: get_app()), session=Depends(get_session)):
     """Рендерит страницу просмотра автора"""
-    return templates.TemplateResponse(request, "author.html", get_info(app) | {"request": request, "title": "LiB - Автор", "id": author_id})
+
+    if author_id == "":
+        return RedirectResponse("/authors")
+
+    try:
+        author = session.get(Author, int(author_id))
+        assert author is not None
+    except:
+        return await unknown(request, app)
+
+    return templates.TemplateResponse(request, "author.html", get_info(app) | {"request": request, "title": f"LiB - Автор \"{author.name}\"", "id": author_id})
 
 
 @router.get("/books", include_in_schema=False)
@@ -98,16 +121,32 @@ async def create_book(request: Request, app=Depends(lambda: get_app())):
 
 
 @router.get("/book/{book_id}/edit", include_in_schema=False)
-async def edit_book(request: Request, book_id: int, app=Depends(lambda: get_app())):
+async def edit_book(request: Request, book_id: str, app=Depends(lambda: get_app()), session=Depends(get_session)):
     """Рендерит страницу редактирования книги"""
-    return templates.TemplateResponse(request, "edit_book.html", get_info(app) | {"request": request, "title": "LiB - Редактировать книгу", "id": book_id})
+
+    try:
+        book = session.get(Book, int(book_id))
+        assert book is not None
+    except:
+        return await unknown(request, app)
+
+    return templates.TemplateResponse(request, "edit_book.html", get_info(app) | {"request": request, "title": f"LiB - Редактировать книгу \"{book.title}\"", "id": book_id})
 
 
 @router.get("/book/{book_id}", include_in_schema=False)
-async def book(request: Request, book_id: int, app=Depends(lambda: get_app()), session=Depends(get_session)):
+async def book(request: Request, book_id: str, app=Depends(lambda: get_app()), session=Depends(get_session)):
     """Рендерит страницу просмотра книги"""
-    book = session.get(Book, book_id)
-    return templates.TemplateResponse(request, "book.html", get_info(app) | {"request": request, "title": "LiB - Книга", "id": book_id, "img": book.preview_id})
+
+    if book_id == "":
+        return RedirectResponse("/books")
+
+    try:
+        book = session.get(Book, int(book_id))
+        assert book is not None
+    except:
+        return await unknown(request, app)
+
+    return templates.TemplateResponse(request, "book.html", get_info(app) | {"request": request, "title": f"LiB - Книга \"{book.title}\"", "id": book_id, "img": book.preview_id})
 
 
 @router.get("/auth", include_in_schema=False)
diff --git a/library_service/routers/relationships.py b/library_service/routers/relationships.py
index 4fda0fa..8892eb4 100644
--- a/library_service/routers/relationships.py
+++ b/library_service/routers/relationships.py
@@ -19,7 +19,8 @@ def check_entity_exists(session, model, entity_id, entity_name):
     entity = session.get(model, entity_id)
     if not entity:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail=f"{entity_name} not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail=f"{entity_name} not found",
         )
     return entity
 
@@ -33,7 +34,10 @@ def add_relationship(session, link_model, id1, field1, id2, field2, detail):
     ).first()
 
     if existing_link:
-        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=detail)
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail=detail,
+        )
 
     link = link_model(**{field1: id1, field2: id2})
     session.add(link)
@@ -52,7 +56,8 @@ def remove_relationship(session, link_model, id1, field1, id2, field2):
 
     if not link:
         raise HTTPException(
-            status_code=status.HTTP_404_NOT_FOUND, detail="Relationship not found"
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Relationship not found",
         )
 
     session.delete(link)
diff --git a/library_service/services/captcha.py b/library_service/services/captcha.py
index 3797364..67249db 100644
--- a/library_service/services/captcha.py
+++ b/library_service/services/captcha.py
@@ -72,6 +72,7 @@ async def require_captcha(request: Request):
     token = request.cookies.get("capjs_token")
     if not token or token not in redeem_tokens or redeem_tokens[token] < now_ms():
         raise HTTPException(
-            status_code=status.HTTP_403_FORBIDDEN, detail={"error": "captcha_required"}
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail={"error": "captcha_required"},
         )
     del redeem_tokens[token]
diff --git a/library_service/static/page/author.js b/library_service/static/page/author.js
index 157bcee..8be15f7 100644
--- a/library_service/static/page/author.js
+++ b/library_service/static/page/author.js
@@ -9,7 +9,6 @@ $(document).ready(() => {
 
   Api.get(`/api/authors/${authorId}`)
     .then((author) => {
-      document.title = `LiB - ${author.name}`;
       renderAuthor(author);
       renderBooks(author.books);
       if (window.canManage()) {
diff --git a/library_service/static/page/book.js b/library_service/static/page/book.js
index 8536564..363df31 100644
--- a/library_service/static/page/book.js
+++ b/library_service/static/page/book.js
@@ -366,7 +366,6 @@ $(document).ready(() => {
     Api.get(`/api/books/${bookId}`)
       .then((book) => {
         currentBook = book;
-        document.title = `LiB - ${book.title}`;
         renderBook(book);
         if (window.canManage()) {
           $("#edit-book-btn")
diff --git a/library_service/static/page/edit_author.js b/library_service/static/page/edit_author.js
index f984b9d..3c32ca8 100644
--- a/library_service/static/page/edit_author.js
+++ b/library_service/static/page/edit_author.js
@@ -32,7 +32,6 @@ $(document).ready(() => {
       originalAuthor = author;
       authorBooks = booksData.books || booksData || [];
 
-      document.title = `Редактирование: ${author.name} | LiB`;
       populateForm(author);
       renderAuthorBooks(authorBooks);
 
diff --git a/library_service/static/page/edit_book.js b/library_service/static/page/edit_book.js
index 29063d5..5b2e54f 100644
--- a/library_service/static/page/edit_book.js
+++ b/library_service/static/page/edit_book.js
@@ -49,7 +49,6 @@ $(document).ready(() => {
         currentGenres.set(g.id, g.name),
       );
 
-      document.title = `Редактирование: ${book.title} | LiB`;
       populateForm(book);
       initAuthorsDropdown();
       initGenresDropdown();
diff --git a/library_service/static/page/edit_genre.js b/library_service/static/page/edit_genre.js
index 3d7e33f..6974771 100644
--- a/library_service/static/page/edit_genre.js
+++ b/library_service/static/page/edit_genre.js
@@ -35,7 +35,6 @@ $(document).ready(() => {
       originalGenre = genre;
       genreBooks = booksData.books || booksData || [];
 
-      document.title = `Редактирование: ${genre.name} | LiB`;
       populateForm(genre);
       renderGenreBooks(genreBooks);
 
diff --git a/library_service/static/page/profile.js b/library_service/static/page/profile.js
index 333dbcc..9288d0c 100644
--- a/library_service/static/page/profile.js
+++ b/library_service/static/page/profile.js
@@ -17,7 +17,7 @@ $(document).ready(() => {
       Api.get("/api/auth/recovery-codes/status").catch(() => null),
     ])
       .then(async ([user, rolesData, recoveryStatus]) => {
-        document.title = `LiB - ${user.full_name || user.username}`;
+        document.title = `LiB - Профиль ${user.full_name || user.username}`;
         currentUsername = user.username;
 
         await renderProfileHeader(user);
diff --git a/library_service/templates/api.html b/library_service/templates/api.html
index bb62380..41252f5 100644
--- a/library_service/templates/api.html
+++ b/library_service/templates/api.html
@@ -2,10 +2,15 @@
 <html lang="en">
     <head>
         <meta charset="UTF-8" />
-        <title id="pageTitle">Loading...</title>
+        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+        <meta property="og:title" content="LiB - API Документация" />
+        <meta property="og:type" content="website" />
+        <meta property="og:description" content="Ваша персональная библиотека книг" />
+        <meta property="og:url" content="{{ request.url.scheme }}://{{ domain }}/" />
         <meta name="viewport" content="width=device-width, initial-scale=1.0" />
         <script src="https://cdnjs.cloudflare.com/ajax/libs/dagre/0.8.5/dagre.min.js"></script>
         <script src="https://cdnjs.cloudflare.com/ajax/libs/jsPlumb/2.15.6/js/jsplumb.min.js"></script>
+        <title id="pageTitle">Loading...</title>
         <style>
             body {
                 font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
diff --git a/setup-replication.sh b/setup-replication.sh
deleted file mode 100644
index 349c604..0000000
--- a/setup-replication.sh
+++ /dev/null
@@ -1,101 +0,0 @@
-#!/bin/sh
-set -e
-
-echo "=== Настройка репликации ==="
-echo "Этот узел: NODE_ID=${NODE_ID}"
-echo "Удаленный хост: ${REMOTE_HOST}"
-
-echo "Ждем локальную базу..."
-sleep 10
-
-until PGPASSWORD="${POSTGRES_PASSWORD}" psql -h db -U "${POSTGRES_USER}" -d "${POSTGRES_DB}" -c '\q' 2>/dev/null; do
-    echo "Локальная база не готова, ждем..."
-    sleep 2
-done
-echo "Локальная база готова"
-
-echo "Настройка генераторов ID (NODE_ID=${NODE_ID})..."
-
-PGPASSWORD="${POSTGRES_PASSWORD}" psql -h db -U "${POSTGRES_USER}" -d "${POSTGRES_DB}" <<EOF
-DO \$\$
-DECLARE
-    r RECORD;
-BEGIN
-    FOR r IN
-        SELECT table_schema, table_name, column_name
-        FROM information_schema.columns
-        WHERE is_identity = 'YES'
-          AND table_schema = 'public'
-    LOOP
-        EXECUTE format(
-            'ALTER TABLE %I.%I ALTER COLUMN %I SET GENERATED BY DEFAULT AS IDENTITY (START WITH %s INCREMENT BY 2)',
-            r.table_schema, r.table_name, r.column_name, ${NODE_ID}
-        );
-        RAISE NOTICE 'Настроен ID для %.%', r.table_name, r.column_name;
-    END LOOP;
-END \$\$;
-EOF
-
-echo "Проверяем/создаем публикацию..."
-
-PUB_EXISTS=$(PGPASSWORD="${POSTGRES_PASSWORD}" psql -h db -U "${POSTGRES_USER}" -d "${POSTGRES_DB}" -tAc "SELECT COUNT(*) FROM pg_publication WHERE pubname = 'all_tables_pub';")
-
-if [ "$PUB_EXISTS" -gt 0 ]; then
-    echo "Публикация уже существует"
-else
-    echo "Создаем публикацию..."
-    PGPASSWORD="${POSTGRES_PASSWORD}" psql -h db -U "${POSTGRES_USER}" -d "${POSTGRES_DB}" <<EOF
-CREATE PUBLICATION all_tables_pub FOR ALL TABLES;
-EOF
-    echo "Публикация создана!"
-fi
-
-echo "Ждем удаленный хост ${REMOTE_HOST}:${REMOTE_PORT}..."
-TIMEOUT=300
-ELAPSED=0
-
-while ! PGPASSWORD="${POSTGRES_PASSWORD}" psql -h "${REMOTE_HOST}" -p ${REMOTE_PORT} -U "${POSTGRES_USER}" -d "${POSTGRES_DB}" -c '\q' 2>/dev/null; do
-    sleep 5
-    ELAPSED=$((ELAPSED + 5))
-    if [ $ELAPSED -ge $TIMEOUT ]; then
-        echo "Таймаут ожидания удаленного хоста. Подписка НЕ настроена."
-        echo "Публикация создана - удаленный хост сможет подписаться на нас."
-        echo "Для создания подписки запустите позже:"
-        echo "docker compose restart replication-setup"
-        exit 0
-    fi
-    echo "Удаленный хост недоступен, ждем... (${ELAPSED}s/${TIMEOUT}s)"
-done
-echo "Удаленный хост доступен"
-
-REMOTE_PUB=$(PGPASSWORD="${POSTGRES_PASSWORD}" psql -h "${REMOTE_HOST}" -p ${REMOTE_PORT} -U "${POSTGRES_USER}" -d "${POSTGRES_DB}" -tAc "SELECT COUNT(*) FROM pg_publication WHERE pubname = 'all_tables_pub';" 2>/dev/null || echo "0")
-
-if [ "$REMOTE_PUB" -eq 0 ]; then
-    echo "ВНИМАНИЕ: На удалённом хосте нет публикации 'all_tables_pub'!"
-    echo "Подписка не будет создана. Сначала запустите скрипт на удалённом хосте."
-    exit 0
-fi
-
-EXISTING=$(PGPASSWORD="${POSTGRES_PASSWORD}" psql -h db -U "${POSTGRES_USER}" -d "${POSTGRES_DB}" -tAc "SELECT COUNT(*) FROM pg_subscription WHERE subname = 'sub_from_remote';")
-
-if [ "$EXISTING" -gt 0 ]; then
-    echo "Подписка уже существует, пропускаем создание"
-else
-    echo "Создаем подписку на удаленный хост..."
-
-    PGPASSWORD="${POSTGRES_PASSWORD}" psql -h db -U "${POSTGRES_USER}" -d "${POSTGRES_DB}" <<EOF
-CREATE SUBSCRIPTION sub_from_remote
-CONNECTION 'host=${REMOTE_HOST} port=${REMOTE_PORT} user=${POSTGRES_USER} password=${POSTGRES_PASSWORD} dbname=${POSTGRES_DB}'
-PUBLICATION all_tables_pub
-WITH (
-    origin = none
-);
-EOF
-
-    echo "Подписка создана!"
-fi
-
-echo ""
-echo "=== Репликация настроена! ==="
-echo "Публикация: all_tables_pub (другие могут подписаться на нас)"
-echo "Подписка: sub_from_remote (мы получаем данные от ${REMOTE_HOST})"