feat: proxy routes page, OIDC login fix, NPM test connection, webhook URL fix, and UX improvements

- Add /proxies page showing deploy-managed proxy routes with project/stage links, search, and status
- Add GET /api/proxies endpoint joining instances with project/stage names
- Add POST /api/settings/npm/test endpoint for NPM connection validation
- Add GET /api/auth/mode public endpoint for auth mode detection
- Add NPM Test Connection button with validation on save
- Fix OIDC SSO button only shown when auth_mode is oidc
- Fix webhook URL showing empty when domain not set (fallback to request host)
- Fix quick deploy double-tag (image:latest:latest) by splitting tag from image URL
- Fix trim() errors on number inputs in deploy and settings forms
- Fix NPM client auto-append /api to base URL
- Sanitize NPM test error messages (no raw HTML)
- Remove healthcheck field from Quick Deploy form
- Fix env vars placeholder newline
- Make domain field optional in settings
- Set polling interval minimum to 60s
- Add Proxies and Events to sidebar navigation
- Fix SSL cert name flash on NPM settings page
- Fix empty state icon on proxies page

web/src/lib/i18n/en.json

@@ -281,7 +281,7 @@
     "varTag": "Image tag",
     "varPort": "Container port",
     "pollingInterval": "Polling Interval (seconds)",
-    "pollingIntervalHelp": "How often to check registries for new tags (10-86400)",
+    "pollingIntervalHelp": "How often to check registries for new tags (60-86400)",
     "notificationUrl": "Notification URL",
     "notificationUrlHelp": "Webhook URL for deploy notifications",
     "saveSettings": "Save Settings",
@@ -367,6 +367,13 @@
     "healthConnected": "Connected",
     "healthUnreachable": "Unreachable"
   },
+  "settingsNpm": {
+    "testConnection": "Test Connection",
+    "testing": "Testing...",
+    "testSuccess": "NPM connection successful",
+    "testFailed": "NPM connection failed",
+    "saveFailedConnection": "Cannot save \u2014 connection test failed"
+  },
   "settingsCredentials": {
     "title": "Credentials",
     "description": "Manage credentials for Nginx Proxy Manager and registry tokens. All values are encrypted at rest.",
@@ -544,7 +551,7 @@
     "invalidIp": "Invalid IP format",
     "invalidEmail": "Invalid email format",
     "invalidPort": "Port must be between 1 and 65535",
-    "invalidPollingInterval": "Polling interval must be between 10 and 86400 seconds",
+    "invalidPollingInterval": "Polling interval must be between 60 and 86400 seconds",
     "invalidProjectName": "Only lowercase letters, numbers, and hyphens allowed",
     "requiredWhenUpdating": "{field} is required when updating credentials",
     "requiredForNew": "{field} is required for new registries"
@@ -628,6 +635,23 @@
       "skipped": "Skipped"
     }
   },
+  "proxies": {
+    "title": "Proxy Routes",
+    "description": "Active proxy routes created by deployments.",
+    "domain": "Domain",
+    "project": "Project",
+    "stage": "Stage",
+    "tag": "Tag",
+    "port": "Port",
+    "status": "Status",
+    "noRoutes": "No proxy routes",
+    "noRoutesDesc": "Proxy routes are created automatically when you deploy a container with proxy enabled.",
+    "searchPlaceholder": "Search by domain, project, or tag...",
+    "noMatch": "No routes match your search.",
+    "loadFailed": "Failed to load proxy routes",
+    "route": "route",
+    "routes": "routes"
+  },
   "events": {
     "title": "Event Log",
     "noEvents": "No events found",