Fix 21 bugs: build failures, broken pages, IPC mismatches, and missing error handling

Critical fixes:
- Add esbuild dependency and fix Vite build target (safari13 → es2022)
- Fix StorageDetail always failing (null node parameter)
- Fix VNC/Terminal console stuck on 'Connecting...' (add onConnected callback)
- Fix Ctrl+Alt+Del not working (add data-vnc attribute and event listener)
- Add serde(rename_all='camelCase') to all 27 Rust structs crossing IPC
- Fix login methods returning empty connection_id (generate from URL hash)
- Fix add_connection not storing connections in HashMap
- Fix keyring_entry panicking on failure (replace expect with map_err)

High-severity fixes:
- Fix refresh_ticket reading wrong keyring entry for username
- Add onError handlers to all 23 mutations (toast notifications)
- Fix stale closure on activeConnectionId (use getState() instead)
- Fix WebSocket listener teardown race condition
- Add WebSocket reconnection retry limit (max 10 attempts)

Medium-severity fixes:
- Add Settings navigation to CommandPalette (Cmd+K)
- Disable dead Nodes/Containers sidebar items
- Wire up HardwareTab save button with warning toast
- Wire up QuickActions navigation buttons
- Add Dashboard error state (was stuck on 'Loading...')
- Add default case to App.tsx view switch
- Extract formatBytes/formatUptime/formatNetworkRate to shared utility
- Fix formatBytes negative input bug

32 files changed, 1073 insertions(+), 356 deletions(-)

src/components/dashboard/QuickActions.tsx

@@ -5,9 +5,10 @@ import { RefreshCw, Server, Box, HardDrive, ListTodo, Shield } from 'lucide-reac
 interface QuickActionsProps {
   onRefresh: () => void
   isRefreshing: boolean
+  onNavigate?: (view: string) => void
 }
 
-export function QuickActions({ onRefresh, isRefreshing }: QuickActionsProps) {
+export function QuickActions({ onRefresh, isRefreshing, onNavigate }: QuickActionsProps) {
   return (
     <Card>
       <CardHeader>
@@ -27,6 +28,7 @@ export function QuickActions({ onRefresh, isRefreshing }: QuickActionsProps) {
           <Button
             variant="outline"
             className="flex flex-col items-center gap-1.5 h-auto py-3"
+            onClick={() => onNavigate?.('dashboard')}
           >
             <Server className="h-4 w-4" />
             <span className="text-xs">Nodes</span>
@@ -34,6 +36,7 @@ export function QuickActions({ onRefresh, isRefreshing }: QuickActionsProps) {
           <Button
             variant="outline"
             className="flex flex-col items-center gap-1.5 h-auto py-3"
+            onClick={() => onNavigate?.('vms')}
           >
             <Box className="h-4 w-4" />
             <span className="text-xs">VMs</span>
@@ -41,6 +44,7 @@ export function QuickActions({ onRefresh, isRefreshing }: QuickActionsProps) {
           <Button
             variant="outline"
             className="flex flex-col items-center gap-1.5 h-auto py-3"
+            onClick={() => onNavigate?.('storage')}
           >
             <HardDrive className="h-4 w-4" />
             <span className="text-xs">Storage</span>
@@ -48,6 +52,7 @@ export function QuickActions({ onRefresh, isRefreshing }: QuickActionsProps) {
           <Button
             variant="outline"
             className="flex flex-col items-center gap-1.5 h-auto py-3"
+            onClick={() => onNavigate?.('tasks')}
           >
             <ListTodo className="h-4 w-4" />
             <span className="text-xs">Tasks</span>
@@ -55,6 +60,7 @@ export function QuickActions({ onRefresh, isRefreshing }: QuickActionsProps) {
           <Button
             variant="outline"
             className="flex flex-col items-center gap-1.5 h-auto py-3"
+            onClick={() => onNavigate?.('backups')}
           >
             <Shield className="h-4 w-4" />
             <span className="text-xs">Backups</span>