fix: frontend-backend integration — 14 issues resolved

- nginx: add proxy routes for /settings/, /templates/, /ipam/, /logs/, /admin/, /health
- dashboard: fix data format mismatch (servers[] not nodes[]/vms[])
- dashboard: add WebSocket subscription to dashboard_metrics for real-time updates
- dashboard: connect activity feed to /logs/api/logs endpoint
- dashboard: reduce polling to 15s with WS as primary update source
- graphs: fix rrddata response unwrap (backend returns {data:[],timeframe:''})
- graphs: add i18n translations for chart titles
- console: add xterm.js CSS import for proper terminal rendering
- console: add i18n translations (connecting, reconnect)
- workspace: add switcher dropdown in TopBar
- workspace: add edit dialog in WorkspacesPage
- workspace: create Zustand store with localStorage persistence
- workspace: add X-Active-Workspace header to API client
- sidebar: replace generic icon with actual favicon.svg logo
- instances: translate RowActionMenu and InstanceDetailPage strings
- locales: add graphs, console, workspace, instance tab keys to en/ru

backend/app/api/auth.py

@@ -1,7 +1,6 @@
 from datetime import datetime, timedelta
 from fastapi import APIRouter, Depends, HTTPException, status, Request, Form
-from fastapi.responses import HTMLResponse, RedirectResponse
-from fastapi.templating import Jinja2Templates
+from fastapi.responses import RedirectResponse
 from sqlalchemy.orm import Session
 from loguru import logger
 
@@ -19,23 +18,9 @@ from ..auth import (
 )
 from ..config import settings, utcnow
 from ..logging_service import LoggingService
-from ..template_helpers import add_i18n_context
 from ..services.security_service import SecurityService
 
 router = APIRouter()
-templates = Jinja2Templates(directory="app/templates")
-
-
-@router.get("/login", response_class=HTMLResponse, include_in_schema=False)
-def login_page(request: Request):
-    """Login page"""
-    context = {
-        "request": request,
-        "panel_name": settings.PANEL_NAME,
-        "version": settings.VERSION,
-    }
-    context = add_i18n_context(request, context)
-    return templates.TemplateResponse("login.html", context)
 
 
 @router.post("/api/auth/login", response_model=Token)