feat: static sites feature with Gitea/GitHub/GitLab support and Deno backend

Deploy static content from Git repository folders with optional server-side
API endpoints. Supports Gitea/Forgejo/Gogs, GitHub, and GitLab with provider
autodetection.

- New Sites entity with CRUD, encrypted secrets, and manual/push/tag sync triggers
- Pluggable GitProvider interface with three implementations
- Deno container mode: auto-generates router from API_{method}_{name} exports
- Static container mode: nginx serving files with optional markdown rendering
- Wizard UI with provider selector, repo picker, branch/folder tree pickers
- Deploy pipeline builds fresh image, starts container, configures NPM proxy
- Stop/Start buttons, force redeploy on manual trigger
- Periodic health checker detects crashed containers
- Proxy route existence check during auto-sync

web/src/lib/i18n/en.json

@@ -17,7 +17,8 @@
     "events": "Events",
     "settings": "Settings",
     "logout": "Log out",
-    "dns": "DNS Records"
+    "dns": "DNS Records",
+    "sites": "Sites"
   },
   "dashboard": {
     "title": "Dashboard",
@@ -539,6 +540,77 @@
     },
     "lastChecked": "Last checked"
   },
+  "sites": {
+    "title": "Static Sites",
+    "addSite": "New Site",
+    "newSite": "New Static Site",
+    "createSite": "Create Site",
+    "noSites": "No static sites",
+    "noSitesDesc": "Deploy static content from a Git repository folder.",
+    "searchPlaceholder": "Search sites by name, domain, or repo...",
+    "noMatching": "No sites match your search.",
+    "name": "Name",
+    "domain": "Domain",
+    "mode": "Mode",
+    "status": "Status",
+    "lastSync": "Last Sync",
+    "deploy": "Deploy",
+    "stop": "Stop",
+    "start": "Start",
+    "openSite": "Open Site",
+    "confirmDelete": "Delete Site",
+    "confirmDeleteMsg": "This will permanently delete the site and remove its container",
+    "siteInfo": "Site Information",
+    "folder": "Folder",
+    "syncTrigger": "Sync Trigger",
+    "commitSha": "Commit SHA",
+    "secrets": "Secrets",
+    "addSecret": "Add Secret",
+    "noSecrets": "No secrets configured. Add secrets if your site needs server-side API keys.",
+    "secretKey": "Key",
+    "secretValue": "Value",
+    "encryptSecret": "Encrypt value",
+    "saveSecret": "Add Secret",
+    "step1Title": "1. Repository",
+    "step2Title": "2. Select Branch",
+    "step3Title": "3. Select Folder",
+    "step4Title": "4. Configuration",
+    "step5Title": "5. Review & Create",
+    "fullRepoUrl": "Repository URL",
+    "fullRepoUrlHelp": "Paste a full URL to auto-fill the fields below (e.g., https://git.example.com/owner/repo)",
+    "serverUrl": "Server URL",
+    "repoUrl": "Git Server URL",
+    "repoUrlHelp": "Paste a full repo URL or enter the server base URL (Gitea, Forgejo, Gogs)",
+    "repoOwner": "Owner",
+    "repoName": "Repository",
+    "accessToken": "Access Token",
+    "accessTokenPlaceholder": "Optional — for private repos",
+    "accessTokenHelp": "Personal access token with repo read permissions. Leave empty for public repos.",
+    "noToken": "None (public repo)",
+    "testConnection": "Test Connection",
+    "connectionSuccess": "Repository is accessible",
+    "loadingBranches": "Loading branches...",
+    "selectBranch": "Select a branch",
+    "chooseBranch": "Choose a branch...",
+    "branch": "Branch",
+    "loadingTree": "Loading repository tree...",
+    "selectFolder": "Select the folder containing your site files",
+    "selectedFolder": "Selected folder",
+    "siteName": "Site Name",
+    "domainHelp": "Public domain for the site. Proxy will be configured automatically.",
+    "modeStaticDesc": "HTML, CSS, JS, images served via Nginx",
+    "modeDenoDesc": "Static files + server-side API from api/ folder",
+    "triggerManual": "Manual",
+    "triggerPush": "On Push",
+    "triggerTag": "On Tag",
+    "tagPattern": "Tag Pattern",
+    "tagPatternHelp": "Glob pattern for matching tags (e.g., v*, pages-*)",
+    "renderMarkdown": "Render Markdown files to HTML",
+    "provider": "Git Provider",
+    "detectedProvider": "Auto-detected",
+    "browseRepos": "Browse repositories",
+    "selectRepo": "Select a repository"
+  },
   "common": {
     "cancel": "Cancel",
     "confirm": "Confirm",
@@ -556,7 +628,11 @@
     "restart": "Restart",
     "remove": "Remove",
     "instance": "instance",
-    "instances": "instances"
+    "instances": "instances",
+    "next": "Next",
+    "yes": "Yes",
+    "no": "No",
+    "saving": "Saving..."
   },
   "instance": {
     "stopConfirm": "This will stop the running container. The instance can be started again later.",