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/proxmox/networks.py

@@ -1,34 +1,16 @@
 from fastapi import APIRouter, Depends, Request, HTTPException
-from fastapi.responses import HTMLResponse, JSONResponse
+from fastapi.responses import JSONResponse
 from sqlalchemy.orm import Session
 from loguru import logger
 
 from ...db import get_db
 from ...models import ProxmoxServer, User, IPAMNetwork
 from ...auth import PermissionChecker
-from ...template_helpers import add_i18n_context
-from ._helpers import _get_proxmox_client, templates
+from ._helpers import _get_proxmox_client
 
 router = APIRouter()
 
 
-# ==================== HTML Page ====================
-
-@router.get("/networks", response_class=HTMLResponse, include_in_schema=False)
-def networks_page(request: Request, db: Session = Depends(get_db)):
-    """Страница управления сетями PVE (SDN + интерфейсы нод)"""
-    from ...i18n import t
-    lang = request.cookies.get("language", "en")
-    proxmox_servers = db.query(ProxmoxServer).all()
-    context = {
-        "request": request,
-        "proxmox_servers": proxmox_servers,
-        "page_title": t("nav_networks", lang),
-    }
-    context = add_i18n_context(request, context)
-    return templates.TemplateResponse("networks.html", context)
-
-
 # ==================== Node list ====================
 
 @router.get("/api/servers/{server_id}/nodes")