feat: SAC 0.7.4 sidebar system stats block with UI toggle

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/alembic/versions/012_ui_settings.py

@@ -0,0 +1,31 @@
+"""ui_settings singleton for SAC UI preferences
+
+Revision ID: 012
+Revises: 011
+"""
+
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+revision: str = "012"
+down_revision: Union[str, None] = "011"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "ui_settings",
+        sa.Column("id", sa.Integer(), nullable=False),
+        sa.Column("show_sidebar_system_stats", sa.Boolean(), nullable=False, server_default=sa.text("true")),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.execute(
+        "INSERT INTO ui_settings (id, show_sidebar_system_stats) VALUES (1, true)"
+    )
+
+
+def downgrade() -> None:
+    op.drop_table("ui_settings")

backend/app/api/v1/auth.py

@@ -1,78 +1,156 @@
-from fastapi import APIRouter, Depends, HTTPException, Request
-
-from pydantic import BaseModel, Field
-
-from sqlalchemy.orm import Session
-
-
-
-from app.auth.jwt_auth import CurrentUser, create_access_token, get_current_user
-
-from app.config import get_settings
-
-from app.database import get_db
-
-from app.services.login_rate_limit import (
-
-    ensure_login_allowed,
-
-    record_login_failure,
-
-    record_login_success,
-
-)
-
-from app.services.user_auth import authenticate_user
-
-
-
-router = APIRouter(prefix="/auth", tags=["auth"])
-
-
-
-
-
-class LoginRequest(BaseModel):
-
-    username: str
-
-    password: str
-
-
-
-
-
-class TokenResponse(BaseModel):
-
-    access_token: str
-
-    token_type: str = "bearer"
-
-    username: str
-
-    role: str
-
-
-
-
-
-class MeResponse(BaseModel):
-
-    username: str
-
-    role: str
-
-
-
-
-
-@router.post("/login", response_model=TokenResponse)
-
-def login(body: LoginRequest, request: Request, db: Session = Depends(get_db)) -> TokenResponse:
-
-    settings = get_settings()
-
-    if not settings.sac_admin_password and not _has_any_user(db):
-
-        raise HTTPException(
-
+from fastapi import APIRouter, Depends, HTTPException, Request
+
+from pydantic import BaseModel, Field
+
+from sqlalchemy.orm import Session
+
+
+
+from app.auth.jwt_auth import CurrentUser, create_access_token, get_current_user
+
+from app.config import get_settings
+
+from app.database import get_db
+
+from app.services.login_rate_limit import (
+
+    ensure_login_allowed,
+
+    record_login_failure,
+
+    record_login_success,
+
+)
+
+from app.services.user_auth import authenticate_user
+
+
+
+router = APIRouter(prefix="/auth", tags=["auth"])
+
+
+
+
+
+class LoginRequest(BaseModel):
+
+    username: str
+
+    password: str
+
+
+
+
+
+class TokenResponse(BaseModel):
+
+    access_token: str
+
+    token_type: str = "bearer"
+
+    username: str
+
+    role: str
+
+
+
+
+
+class MeResponse(BaseModel):
+
+    username: str
+
+    role: str
+
+
+
+
+
+@router.post("/login", response_model=TokenResponse)
+
+def login(body: LoginRequest, request: Request, db: Session = Depends(get_db)) -> TokenResponse:
+
+    settings = get_settings()
+
+    if not settings.sac_admin_password and not _has_any_user(db):
+
+        raise HTTPException(
+
+            status_code=503,
+
+            detail="SAC UI users are not configured (run alembic upgrade and set SAC_ADMIN_PASSWORD for bootstrap)",
+
+        )
+
+
+
+    ip_address = ensure_login_allowed(db, request)
+
+
+
+    user = authenticate_user(db, body.username, body.password)
+
+    if user is None:
+
+        record_login_failure(db, ip_address=ip_address, username=body.username)
+
+        db.commit()
+
+        raise HTTPException(status_code=401, detail="Invalid username or password")
+
+
+
+    record_login_success(db, ip_address=ip_address, username=user.username)
+
+    db.commit()
+
+
+
+    token = create_access_token(user.username, user.role)
+
+    return TokenResponse(
+
+        access_token=token,
+
+        username=user.username,
+
+        role=user.role,
+
+    )
+
+
+
+
+
+@router.get("/me", response_model=MeResponse)
+
+def me(current_user: CurrentUser = Depends(get_current_user)) -> MeResponse:
+
+    return MeResponse(username=current_user.username, role=current_user.role)
+
+
+
+
+
+def _has_any_user(db: Session) -> bool:
+
+    from sqlalchemy import func, select
+
+
+
+    from app.models.user import User
+
+
+
+    try:
+
+        count = db.scalar(select(func.count()).select_from(User)) or 0
+
+        return count > 0
+
+    except Exception:
+
+        db.rollback()
+
+        return False
+

backend/app/api/v1/router.py

@@ -1,6 +1,6 @@
 from fastapi import APIRouter
 
-from app.api.v1 import auth, dashboards, events, health, hosts, problems, settings, stream, users
+from app.api.v1 import auth, dashboards, events, health, hosts, problems, settings, stream, system, users
 
 api_router = APIRouter()
 api_router.include_router(health.router)
@@ -10,5 +10,6 @@ api_router.include_router(hosts.router)
 api_router.include_router(problems.router)
 api_router.include_router(dashboards.router)
 api_router.include_router(settings.router)
+api_router.include_router(system.router)
 api_router.include_router(users.router)
 api_router.include_router(stream.router)

backend/app/api/v1/settings.py

@@ -28,6 +28,10 @@ from app.services.event_severity_overrides import (
     list_severity_override_items,
     replace_severity_overrides,
 )
+from app.services.ui_settings import (
+    get_effective_ui_settings,
+    upsert_ui_settings,
+)
 
 router = APIRouter(prefix="/settings", tags=["settings"])
 
@@ -392,3 +396,37 @@ def update_severity_overrides(
         ],
         source=SOURCE_DB,
     )
+
+
+class UiSettingsResponse(BaseModel):
+    show_sidebar_system_stats: bool
+    source: str = Field(description="db или default")
+
+
+class UiSettingsUpdate(BaseModel):
+    show_sidebar_system_stats: bool
+
+
+@router.get("/ui", response_model=UiSettingsResponse)
+def get_ui_settings(
+    db: Session = Depends(get_db),
+    _user=Depends(require_admin),
+) -> UiSettingsResponse:
+    cfg = get_effective_ui_settings(db)
+    return UiSettingsResponse(
+        show_sidebar_system_stats=cfg.show_sidebar_system_stats,
+        source=cfg.source,
+    )
+
+
+@router.put("/ui", response_model=UiSettingsResponse)
+def update_ui_settings(
+    body: UiSettingsUpdate,
+    db: Session = Depends(get_db),
+    _user=Depends(require_admin),
+) -> UiSettingsResponse:
+    cfg = upsert_ui_settings(db, show_sidebar_system_stats=body.show_sidebar_system_stats)
+    return UiSettingsResponse(
+        show_sidebar_system_stats=cfg.show_sidebar_system_stats,
+        source=cfg.source,
+    )

backend/app/api/v1/system.py

@@ -0,0 +1,30 @@
+from fastapi import APIRouter, Depends
+from pydantic import BaseModel, Field
+from sqlalchemy.orm import Session
+
+from app.auth.jwt_auth import get_current_user
+from app.database import get_db
+from app.services.system_stats import collect_system_stats
+from app.services.ui_settings import get_effective_ui_settings
+
+router = APIRouter(prefix="/system", tags=["system"])
+
+
+class SystemStatsResponse(BaseModel):
+    visible: bool = Field(description="Показывать блок в боковой панели (глобальная настройка)")
+    collected_at: str
+    cpu_percent: float | None = None
+    memory: dict | None = None
+    disk: dict | None = None
+    database: dict
+    app: dict
+
+
+@router.get("/stats", response_model=SystemStatsResponse)
+def get_system_stats(
+    db: Session = Depends(get_db),
+    _user=Depends(get_current_user),
+) -> SystemStatsResponse:
+    ui = get_effective_ui_settings(db)
+    payload = collect_system_stats(db)
+    return SystemStatsResponse(visible=ui.show_sidebar_system_stats, **payload)

backend/app/auth/jwt_auth.py

@@ -1,171 +1,341 @@
-from dataclasses import dataclass
-
-
-
-from datetime import datetime, timedelta, timezone
-
-
-
-
-
-
-
-from fastapi import Depends, HTTPException, status
-
-
-
-from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
-
-
-
-from jose import JWTError, jwt
-
-
-
-from sqlalchemy import func, select
-
-
-
-from sqlalchemy.orm import Session
-
-
-
-
-
-
-
-from app.config import get_settings
-
-
-
-from app.database import get_db
-
-
-
-from app.models.user import USER_ROLE_ADMIN, User
-
-
-
-
-
-
-
-bearer_scheme = HTTPBearer(auto_error=False)
-
-
-
-
-
-
-
-
-
-
-
-@dataclass(frozen=True)
-
-
-
-class CurrentUser:
-
-
-
-    username: str
-
-
-
-    role: str
-
-
-
-
-
-
-
-    @property
-
-
-
-    def is_admin(self) -> bool:
-
-
-
-        return self.role == USER_ROLE_ADMIN
-
-
-
-
-
-
-
-
-
-
-
-def create_access_token(subject: str, role: str) -> str:
-
-
-
-    settings = get_settings()
-
-
-
-    expire = datetime.now(timezone.utc) + timedelta(minutes=settings.jwt_expire_minutes)
-
-
-
-    payload = {"sub": subject, "role": role, "exp": expire}
-
-
-
-    return jwt.encode(payload, settings.jwt_secret, algorithm=settings.jwt_algorithm)
-
-
-
-
-
-
-
-
-
-
-
-def _user_from_db(db: Session, username: str) -> User:
-
-
-
-    normalized = username.strip()
-
-
-
-    user = db.scalar(select(User).where(func.lower(User.username) == normalized.lower()))
-
-
-
-    if user is None or not user.is_active:
-
-
-
-        raise HTTPException(status_code=401, detail="Invalid token")
-
-
-
-    return user
-
-
-
-
-
-
-
-
-
-
-
-def _decode_current_user(token: str, db: Session | None = None) -> CurrentUser:
-
-
-
-    settings = get_settings()
-
-
+from dataclasses import dataclass
+
+
+
+from datetime import datetime, timedelta, timezone
+
+
+
+
+
+
+
+from fastapi import Depends, HTTPException, status
+
+
+
+from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
+
+
+
+from jose import JWTError, jwt
+
+
+
+from sqlalchemy import func, select
+
+
+
+from sqlalchemy.orm import Session
+
+
+
+
+
+
+
+from app.config import get_settings
+
+
+
+from app.database import get_db
+
+
+
+from app.models.user import USER_ROLE_ADMIN, User
+
+
+
+
+
+
+
+bearer_scheme = HTTPBearer(auto_error=False)
+
+
+
+
+
+
+
+
+
+
+
+@dataclass(frozen=True)
+
+
+
+class CurrentUser:
+
+
+
+    username: str
+
+
+
+    role: str
+
+
+
+
+
+
+
+    @property
+
+
+
+    def is_admin(self) -> bool:
+
+
+
+        return self.role == USER_ROLE_ADMIN
+
+
+
+
+
+
+
+
+
+
+
+def create_access_token(subject: str, role: str) -> str:
+
+
+
+    settings = get_settings()
+
+
+
+    expire = datetime.now(timezone.utc) + timedelta(minutes=settings.jwt_expire_minutes)
+
+
+
+    payload = {"sub": subject, "role": role, "exp": expire}
+
+
+
+    return jwt.encode(payload, settings.jwt_secret, algorithm=settings.jwt_algorithm)
+
+
+
+
+
+
+
+
+
+
+
+def _user_from_db(db: Session, username: str) -> User:
+
+
+
+    normalized = username.strip()
+
+
+
+    user = db.scalar(select(User).where(func.lower(User.username) == normalized.lower()))
+
+
+
+    if user is None or not user.is_active:
+
+
+
+        raise HTTPException(status_code=401, detail="Invalid token")
+
+
+
+    return user
+
+
+
+
+
+
+
+
+
+
+
+def _decode_current_user(token: str, db: Session | None = None) -> CurrentUser:
+
+
+
+    settings = get_settings()
+
+
+
+    try:
+
+
+
+        payload = jwt.decode(
+
+
+
+            token,
+
+
+
+            settings.jwt_secret,
+
+
+
+            algorithms=[settings.jwt_algorithm],
+
+
+
+        )
+
+
+
+        username = payload.get("sub")
+
+
+
+        if not username:
+
+
+
+            raise HTTPException(status_code=401, detail="Invalid token")
+
+
+
+        if db is not None:
+
+
+
+            user = _user_from_db(db, str(username))
+
+
+
+            return CurrentUser(username=user.username, role=user.role)
+
+
+
+        role = str(payload.get("role") or USER_ROLE_ADMIN)
+
+
+
+        return CurrentUser(username=str(username), role=role)
+
+
+
+    except JWTError as exc:
+
+
+
+        raise HTTPException(status_code=401, detail="Invalid token") from exc
+
+
+
+
+
+
+
+
+
+
+
+def verify_access_token(token: str, db: Session | None = None) -> str:
+
+
+
+    """Проверка JWT (в т.ч. query-параметр для SSE). Возвращает username."""
+
+
+
+    return _decode_current_user(token, db=db).username
+
+
+
+
+
+
+
+
+
+
+
+def get_current_user(
+
+
+
+    credentials: HTTPAuthorizationCredentials | None = Depends(bearer_scheme),
+
+
+
+    db: Session = Depends(get_db),
+
+
+
+) -> CurrentUser:
+
+
+
+    if credentials is None or credentials.scheme.lower() != "bearer":
+
+
+
+        raise HTTPException(
+
+
+
+            status_code=status.HTTP_401_UNAUTHORIZED,
+
+
+
+            detail="Not authenticated",
+
+
+
+        )
+
+
+
+    return _decode_current_user(credentials.credentials, db=db)
+
+
+
+
+
+
+
+
+
+
+
+def require_admin(user: CurrentUser = Depends(get_current_user)) -> CurrentUser:
+
+
+
+    if not user.is_admin:
+
+
+
+        raise HTTPException(
+
+
+
+            status_code=status.HTTP_403_FORBIDDEN,
+
+
+
+            detail="Admin access required",
+
+
+
+        )
+
+
+
+    return user
+
+
+
+

backend/app/models/__init__.py

@@ -6,6 +6,7 @@ from app.models.notification_cooldown import NotificationCooldown
 from app.models.notification_policy import NotificationPolicy
 from app.models.problem import Problem, ProblemEvent
 from app.models.login_attempt import LoginAttempt
+from app.models.ui_settings import UiSettings
 from app.models.event_severity_override import EventSeverityOverride
 from app.models.user import User
 
@@ -21,4 +22,5 @@ __all__ = [
     "User",
     "EventSeverityOverride",
     "LoginAttempt",
+    "UiSettings",
 ]

backend/app/models/ui_settings.py

@@ -0,0 +1,15 @@
+from sqlalchemy import Boolean
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.database import Base
+
+UI_SETTINGS_ROW_ID = 1
+
+
+class UiSettings(Base):
+    """Singleton: глобальные настройки интерфейса SAC."""
+
+    __tablename__ = "ui_settings"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    show_sidebar_system_stats: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)

backend/app/services/system_stats.py

@@ -0,0 +1,115 @@
+"""Host and DB metrics for SAC sidebar (best-effort, no heavy queries)."""
+
+from __future__ import annotations
+
+import os
+import shutil
+import time
+from datetime import datetime, timedelta, timezone
+from pathlib import Path
+
+from sqlalchemy import func, select, text
+from sqlalchemy.orm import Session
+
+from app.models import Event, Problem
+
+
+def _disk_path() -> str:
+    explicit = os.environ.get("SAC_STATS_DISK_PATH", "").strip()
+    if explicit:
+        return explicit
+    return str(Path("/").resolve())
+
+
+def _read_cpu_percent() -> float | None:
+    try:
+        import psutil  # type: ignore[import-untyped]
+
+        return round(float(psutil.cpu_percent(interval=None)), 1)
+    except Exception:
+        return None
+
+
+def _read_memory() -> dict[str, float | int] | None:
+    try:
+        import psutil  # type: ignore[import-untyped]
+
+        vm = psutil.virtual_memory()
+        return {
+            "used_mb": int(vm.used / (1024 * 1024)),
+            "total_mb": int(vm.total / (1024 * 1024)),
+            "percent": round(float(vm.percent), 1),
+        }
+    except Exception:
+        return None
+
+
+def _read_disk(path: str) -> dict[str, float | int | str] | None:
+    try:
+        usage = shutil.disk_usage(path)
+        total = int(usage.total)
+        used = int(usage.used)
+        if total <= 0:
+            return None
+        return {
+            "path": path,
+            "used_gb": round(used / (1024**3), 1),
+            "total_gb": round(total / (1024**3), 1),
+            "percent": round(100.0 * used / total, 1),
+        }
+    except Exception:
+        return None
+
+
+def collect_system_stats(db: Session) -> dict:
+    collected_at = datetime.now(timezone.utc).isoformat()
+    disk_path = _disk_path()
+
+    db_status = "ok"
+    db_latency_ms: float | None = None
+    db_connections: int | None = None
+    t0 = time.perf_counter()
+    try:
+        db.execute(text("SELECT 1"))
+        db_latency_ms = round((time.perf_counter() - t0) * 1000, 1)
+        try:
+            db_connections = int(
+                db.scalar(
+                    text(
+                        "SELECT count(*) FROM pg_stat_activity "
+                        "WHERE datname = current_database() AND pid <> pg_backend_pid()"
+                    )
+                )
+                or 0
+            )
+        except Exception:
+            db_connections = None
+    except Exception:
+        db_status = "error"
+
+    since = datetime.now(timezone.utc) - timedelta(hours=1)
+    events_last_hour = 0
+    problems_open = 0
+    if db_status == "ok":
+        events_last_hour = int(
+            db.scalar(select(func.count()).select_from(Event).where(Event.received_at >= since)) or 0
+        )
+        problems_open = int(
+            db.scalar(select(func.count()).select_from(Problem).where(Problem.status == "open")) or 0
+        )
+
+    return {
+        "collected_at": collected_at,
+        "cpu_percent": _read_cpu_percent(),
+        "memory": _read_memory(),
+        "disk": _read_disk(disk_path),
+        "database": {
+            "status": db_status,
+            "latency_ms": db_latency_ms,
+            "active_connections": db_connections,
+        },
+        "app": {
+            "events_last_hour": events_last_hour,
+            "problems_open": problems_open,
+        },
+    }

backend/app/services/ui_settings.py

@@ -0,0 +1,30 @@
+from dataclasses import dataclass
+
+from sqlalchemy.orm import Session
+
+from app.models.ui_settings import UI_SETTINGS_ROW_ID, UiSettings
+
+
+@dataclass(frozen=True)
+class UiSettingsConfig:
+    show_sidebar_system_stats: bool
+    source: str = "db"
+
+
+def get_effective_ui_settings(db: Session) -> UiSettingsConfig:
+    row = db.get(UiSettings, UI_SETTINGS_ROW_ID)
+    if row is None:
+        return UiSettingsConfig(show_sidebar_system_stats=True, source="default")
+    return UiSettingsConfig(show_sidebar_system_stats=bool(row.show_sidebar_system_stats), source="db")
+
+
+def upsert_ui_settings(db: Session, *, show_sidebar_system_stats: bool) -> UiSettingsConfig:
+    row = db.get(UiSettings, UI_SETTINGS_ROW_ID)
+    if row is None:
+        row = UiSettings(id=UI_SETTINGS_ROW_ID, show_sidebar_system_stats=show_sidebar_system_stats)
+        db.add(row)
+    else:
+        row.show_sidebar_system_stats = show_sidebar_system_stats
+    db.commit()
+    db.refresh(row)
+    return get_effective_ui_settings(db)

backend/app/version.py

@@ -1,5 +1,5 @@
 """Единый источник версии SAC (API, health, логи, OpenAPI)."""
 
 APP_NAME = "Security Alert Center"
-APP_VERSION = "0.7.3"
+APP_VERSION = "0.7.4"
 APP_VERSION_LABEL = f"{APP_NAME} v.{APP_VERSION}"

backend/requirements.txt

@@ -10,6 +10,7 @@ jsonschema>=4.23.0,<5
 passlib[bcrypt]>=1.7.4,<2
 python-jose[cryptography]>=3.3.0,<4
 httpx>=0.28.0,<1
+psutil>=6.1.0,<8
 
 # dev
 pytest>=8.3.0,<9

backend/tests/test_health.py

@@ -4,6 +4,6 @@ from app.version import APP_NAME, APP_VERSION, APP_VERSION_LABEL
 
 
 def test_version_constants():
-    assert APP_VERSION == "0.7.3"
+    assert APP_VERSION == "0.7.4"
     assert APP_NAME == "Security Alert Center"
-    assert APP_VERSION_LABEL == "Security Alert Center v.0.7.3"
+    assert APP_VERSION_LABEL == "Security Alert Center v.0.7.4"

backend/tests/test_system_stats.py

@@ -0,0 +1,30 @@
+"""GET /api/v1/system/stats"""
+
+from app.services.ui_settings import upsert_ui_settings
+
+
+def test_system_stats_requires_auth(client):
+    response = client.get("/api/v1/system/stats")
+    assert response.status_code == 401
+
+
+def test_system_stats_visible_default(jwt_headers, client):
+    response = client.get("/api/v1/system/stats", headers=jwt_headers)
+    assert response.status_code == 200
+    body = response.json()
+    assert body["visible"] is True
+    assert "collected_at" in body
+    assert "database" in body
+    assert body["database"]["status"] in ("ok", "error")
+    assert "app" in body
+    assert "events_last_hour" in body["app"]
+    assert "problems_open" in body["app"]
+
+
+def test_system_stats_respects_ui_setting(jwt_headers, client, db_session):
+    upsert_ui_settings(db_session, show_sidebar_system_stats=False)
+    db_session.commit()
+
+    response = client.get("/api/v1/system/stats", headers=jwt_headers)
+    assert response.status_code == 200
+    assert response.json()["visible"] is False

backend/tests/test_ui_settings.py

@@ -0,0 +1,32 @@
+"""GET/PUT /api/v1/settings/ui"""
+
+from app.models.ui_settings import UI_SETTINGS_ROW_ID, UiSettings
+
+
+def test_get_ui_settings_default(jwt_headers, client):
+    response = client.get("/api/v1/settings/ui", headers=jwt_headers)
+    assert response.status_code == 200
+    body = response.json()
+    assert body["show_sidebar_system_stats"] is True
+    assert body["source"] == "default"
+
+
+def test_put_ui_settings_persists(jwt_headers, client, db_session):
+    response = client.put(
+        "/api/v1/settings/ui",
+        headers=jwt_headers,
+        json={"show_sidebar_system_stats": False},
+    )
+    assert response.status_code == 200
+    body = response.json()
+    assert body["show_sidebar_system_stats"] is False
+    assert body["source"] == "db"
+
+    row = db_session.get(UiSettings, UI_SETTINGS_ROW_ID)
+    assert row is not None
+    assert row.show_sidebar_system_stats is False
+
+
+def test_ui_settings_requires_admin(jwt_monitor_headers, client):
+    response = client.get("/api/v1/settings/ui", headers=jwt_monitor_headers)
+    assert response.status_code == 403

frontend/package.json

@@ -1,7 +1,7 @@
 {
   "name": "sac-ui",
   "private": true,
-  "version": "0.7.3",
+  "version": "0.7.4",
   "type": "module",
   "scripts": {
     "dev": "vite",

frontend/src/components/AppSidebar.vue

@@ -20,6 +20,7 @@
       </RouterLink>
     </nav>
     <div class="sac-sidebar-footer">
+      <SidebarSystemStats />
       <button type="button" class="sac-nav-item sac-nav-logout" @click="logout">
         <span class="sac-nav-icon" aria-hidden="true">⏻</span>
         <span class="sac-nav-label">Выход</span>
@@ -32,6 +33,7 @@
 import { computed } from "vue";
 import { useRoute, useRouter } from "vue-router";
 import { clearToken, isAdmin } from "../api";
+import SidebarSystemStats from "./SidebarSystemStats.vue";
 import { APP_NAME, APP_VERSION } from "../version";
 
 const appName = APP_NAME;
@@ -137,6 +139,9 @@ function logout() {
   padding-top: 0.75rem;
   margin-top: auto;
   border-top: 1px solid #2a3441;
+  display: flex;
+  flex-direction: column;
+  gap: 0.35rem;
 }
 
 .sac-nav-item {

frontend/src/components/SidebarSystemStats.vue

@@ -0,0 +1,191 @@
+<template>
+  <div v-if="visible" class="sidebar-stats" aria-label="Состояние сервера SAC">
+    <p class="sidebar-stats-title">Сервер</p>
+    <div v-if="loading && !stats" class="sidebar-stats-muted">…</div>
+    <template v-else-if="stats">
+      <div v-if="stats.cpu_percent != null" class="sidebar-stat-row">
+        <span class="sidebar-stat-label">CPU</span>
+        <div class="sidebar-stat-bar-wrap">
+          <div
+            class="sidebar-stat-bar"
+            :class="barClass(stats.cpu_percent)"
+            :style="{ width: `${Math.min(100, stats.cpu_percent)}%` }"
+          />
+        </div>
+        <span class="sidebar-stat-value">{{ stats.cpu_percent }}%</span>
+      </div>
+      <div v-if="stats.memory" class="sidebar-stat-row">
+        <span class="sidebar-stat-label">RAM</span>
+        <div class="sidebar-stat-bar-wrap">
+          <div
+            class="sidebar-stat-bar"
+            :class="barClass(stats.memory.percent)"
+            :style="{ width: `${Math.min(100, stats.memory.percent)}%` }"
+          />
+        </div>
+        <span class="sidebar-stat-value">{{ stats.memory.percent }}%</span>
+      </div>
+      <div v-if="stats.disk" class="sidebar-stat-row">
+        <span class="sidebar-stat-label">Диск</span>
+        <div class="sidebar-stat-bar-wrap">
+          <div
+            class="sidebar-stat-bar"
+            :class="barClass(stats.disk.percent)"
+            :style="{ width: `${Math.min(100, stats.disk.percent)}%` }"
+          />
+        </div>
+        <span class="sidebar-stat-value">{{ stats.disk.percent }}%</span>
+      </div>
+      <ul class="sidebar-stats-meta">
+        <li v-if="stats.database.latency_ms != null">
+          БД: {{ stats.database.latency_ms }} ms
+          <span v-if="stats.database.active_connections != null">
+            · {{ stats.database.active_connections }} conn
+          </span>
+        </li>
+        <li>События/ч: {{ stats.app.events_last_hour }}</li>
+        <li>Problems open: {{ stats.app.problems_open }}</li>
+      </ul>
+    </template>
+    <p v-else-if="error" class="sidebar-stats-error" :title="error">нет данных</p>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { onMounted, onUnmounted, ref } from "vue";
+import { apiFetch } from "../api";
+
+export interface SystemStats {
+  visible: boolean;
+  collected_at: string;
+  cpu_percent: number | null;
+  memory: { used_mb: number; total_mb: number; percent: number } | null;
+  disk: { path: string; used_gb: number; total_gb: number; percent: number } | null;
+  database: { status: string; latency_ms: number | null; active_connections: number | null };
+  app: { events_last_hour: number; problems_open: number };
+}
+
+const POLL_MS = 30_000;
+
+const visible = ref(false);
+const stats = ref<SystemStats | null>(null);
+const loading = ref(false);
+const error = ref("");
+
+let timer: ReturnType<typeof setInterval> | null = null;
+
+function barClass(percent: number): string {
+  if (percent >= 90) return "is-critical";
+  if (percent >= 70) return "is-warn";
+  return "is-ok";
+}
+
+async function refresh() {
+  loading.value = true;
+  try {
+    const data = await apiFetch<SystemStats>("/api/v1/system/stats");
+    visible.value = data.visible;
+    if (data.visible) {
+      stats.value = data;
+    } else {
+      stats.value = null;
+    }
+    error.value = "";
+  } catch (e) {
+    error.value = e instanceof Error ? e.message : "Ошибка";
+    visible.value = false;
+  } finally {
+    loading.value = false;
+  }
+}
+
+onMounted(() => {
+  void refresh();
+  timer = setInterval(() => void refresh(), POLL_MS);
+});
+
+onUnmounted(() => {
+  if (timer) clearInterval(timer);
+});
+
+defineExpose({ refresh });
+</script>
+
+<style scoped>
+.sidebar-stats {
+  flex-shrink: 0;
+  margin-bottom: 0.65rem;
+  padding: 0.55rem 0.65rem;
+  background: #0f1419;
+  border: 1px solid #2a3441;
+  border-radius: 6px;
+  font-size: 0.72rem;
+  color: #9aa4b2;
+}
+
+.sidebar-stats-title {
+  margin: 0 0 0.45rem;
+  font-size: 0.68rem;
+  font-weight: 600;
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+  color: #7eb8ff;
+}
+
+.sidebar-stat-row {
+  display: grid;
+  grid-template-columns: 2rem 1fr 2.1rem;
+  align-items: center;
+  gap: 0.35rem;
+  margin-bottom: 0.35rem;
+}
+
+.sidebar-stat-label {
+  color: #c5d0dc;
+}
+
+.sidebar-stat-bar-wrap {
+  height: 0.35rem;
+  background: #1a2332;
+  border-radius: 2px;
+  overflow: hidden;
+}
+
+.sidebar-stat-bar {
+  height: 100%;
+  border-radius: 2px;
+  transition: width 0.25s ease;
+}
+
+.sidebar-stat-bar.is-ok {
+  background: #6bcb77;
+}
+
+.sidebar-stat-bar.is-warn {
+  background: #ffc857;
+}
+
+.sidebar-stat-bar.is-critical {
+  background: #ff6b6b;
+}
+
+.sidebar-stat-value {
+  text-align: right;
+  color: #e8eaed;
+  font-variant-numeric: tabular-nums;
+}
+
+.sidebar-stats-meta {
+  list-style: none;
+  margin: 0.45rem 0 0;
+  padding: 0;
+  line-height: 1.45;
+  font-size: 0.68rem;
+}
+
+.sidebar-stats-muted,
+.sidebar-stats-error {
+  margin: 0;
+  font-size: 0.72rem;
+}
+</style>

frontend/src/version.ts

@@ -1,3 +1,3 @@
 export const APP_NAME = "Security Alert Center";
-export const APP_VERSION = "0.7.3";
+export const APP_VERSION = "0.7.4";
 export const APP_VERSION_LABEL = `${APP_NAME} v.${APP_VERSION}`;

frontend/src/views/SettingsView.vue

@@ -11,6 +11,27 @@
     <p v-else-if="loading">Загрузка…</p>
 
     <template v-else>
+      <section class="card settings-card settings-policy">
+        <h2>Интерфейс</h2>
+        <p class="settings-hint settings-hint-top">
+          Блок «Сервер» в левой панели: CPU, RAM, диск, задержка БД и счётчики SAC. Обновляется каждые 30 секунд.
+        </p>
+        <form class="settings-form" @submit.prevent="saveUiSettings">
+          <label class="settings-field settings-inline">
+            <input v-model="uiForm.show_sidebar_system_stats" type="checkbox" />
+            Показывать блок системной информации в боковой панели
+          </label>
+          <p v-if="uiLoaded" class="settings-meta">
+            Источник: <code>{{ uiLoaded.source }}</code>
+          </p>
+          <div class="settings-actions">
+            <button type="submit" :disabled="savingUi">
+              {{ savingUi ? "Сохранение…" : "Сохранить интерфейс" }}
+            </button>
+          </div>
+        </form>
+      </section>
+
       <section class="card settings-card settings-policy">
         <h2>Правило оповещений</h2>
         <p class="settings-hint settings-hint-top">
@@ -291,6 +312,11 @@ interface NotificationPolicy {
   source: string;
 }
 
+interface UiSettings {
+  show_sidebar_system_stats: boolean;
+  source: string;
+}
+
 interface SeverityOverrideRowApi {
   event_type: string;
   default_severity: string;
@@ -303,6 +329,7 @@ interface SeverityOverrideRowUi extends SeverityOverrideRowApi {
 
 const loading = ref(true);
 const savingPolicy = ref(false);
+const savingUi = ref(false);
 const savingTelegram = ref(false);
 const savingWebhook = ref(false);
 const savingEmail = ref(false);
@@ -316,6 +343,7 @@ const telegramLoaded = ref<TelegramSettings | null>(null);
 const webhookLoaded = ref<WebhookSettings | null>(null);
 const emailLoaded = ref<EmailSettings | null>(null);
 const policyLoaded = ref<NotificationPolicy | null>(null);
+const uiLoaded = ref<UiSettings | null>(null);
 const severityRows = ref<SeverityOverrideRowUi[]>([]);
 const severityFilter = ref("");
 
@@ -326,6 +354,10 @@ const policyForm = reactive({
   use_email: false,
 });
 
+const uiForm = reactive({
+  show_sidebar_system_stats: true,
+});
+
 const telegramForm = reactive({
   enabled: false,
   bot_token: "",
@@ -429,6 +461,31 @@ async function saveSeverityOverrides() {
   }
 }
 
+async function loadUiSettings() {
+  const data = await apiFetch<UiSettings>("/api/v1/settings/ui");
+  uiLoaded.value = data;
+  uiForm.show_sidebar_system_stats = data.show_sidebar_system_stats;
+}
+
+async function saveUiSettings() {
+  savingUi.value = true;
+  error.value = "";
+  success.value = "";
+  try {
+    uiLoaded.value = await apiFetch<UiSettings>("/api/v1/settings/ui", {
+      method: "PUT",
+      body: JSON.stringify({
+        show_sidebar_system_stats: uiForm.show_sidebar_system_stats,
+      }),
+    });
+    success.value = "Настройки интерфейса сохранены.";
+  } catch (e) {
+    error.value = e instanceof Error ? e.message : "Ошибка сохранения";
+  } finally {
+    savingUi.value = false;
+  }
+}
+
 async function load() {
   loading.value = true;
   error.value = "";
@@ -463,6 +520,7 @@ async function load() {
     emailForm.mail_to = "";
     emailForm.smtp_starttls = data.email.smtp_starttls;
     emailForm.smtp_ssl = data.email.smtp_ssl;
+    await loadUiSettings();
     await loadSeverityOverrides();
   } catch (e) {
     error.value = e instanceof Error ? e.message : "Ошибка загрузки";