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/users.py

@@ -5,8 +5,6 @@ Users and Roles Management API
 from datetime import datetime, timedelta
 from typing import List, Optional
 from fastapi import APIRouter, Depends, HTTPException, status, Request
-from fastapi.responses import HTMLResponse
-from fastapi.templating import Jinja2Templates
 from sqlalchemy.orm import Session
 from pydantic import BaseModel, Field, EmailStr
 from loguru import logger
@@ -23,27 +21,8 @@ from ..auth import (
 from ..config import utcnow
 from ..services.security_service import SecurityService
 from ..logging_service import LoggingService
-from ..template_helpers import add_i18n_context
-
 
 router = APIRouter()
-templates = Jinja2Templates(directory="app/templates")
-
-
-# ==================== HTML Pages ====================
-
-@router.get("/users", response_class=HTMLResponse, include_in_schema=False)
-async def users_page(request: Request, db: Session = Depends(get_db)):
-    """Users management page (admin only) - auth checked on frontend"""
-    from ..i18n import t
-    lang = request.cookies.get("language", "en")
-    
-    context = {
-        "request": request,
-        "page_title": t('nav_users', lang),
-    }
-    context = add_i18n_context(request, context)
-    return templates.TemplateResponse("users.html", context)
 
 
 # ==================== Schemas ====================
@@ -136,24 +115,6 @@ class SecuritySettingsUpdate(BaseModel):
     password_require_special: Optional[bool] = None
 
 
-# ==================== HTML Pages ====================
-
-@router.get("/", response_class=HTMLResponse)
-async def users_page(
-    request: Request,
-):
-    """Render users management page"""
-    from ..i18n import t
-    lang = request.cookies.get("language", "en")
-    
-    context = {
-        "request": request,
-        "page_title": t('nav_users', lang),
-    }
-    context = add_i18n_context(request, context)
-    return templates.TemplateResponse("users.html", context)
-
-
 # ==================== Role API ====================
 
 @router.get("/api/roles", response_model=List[RoleResponse])