feat: move tailscale device discovery and settings into a plugin

Adds plugins/tailscale/ with a devices sidebar tab, admin settings
section, and re-auth dialog. Host Metrics tailscale manager card and
SSH re-auth banner parsing stay in core.

src/backend/database/database.ts

@@ -28,7 +28,7 @@ import uiPreferencesRoutes from "./routes/ui-preferences.js";
 import proxmoxDispatch from "./routes/proxmox-dispatch.js";
 import termixIdRoutes from "./routes/termix-id.js";
 import { registerAuditLogRoutes } from "./routes/audit-log-routes.js";
-import { registerTailscaleRoutes } from "./routes/tailscale-routes.js";
+import tailscaleDispatch from "./routes/tailscale-dispatch.js";
 import vaultRoutes from "./routes/vault.js";
 import secretSourceRoutes from "./routes/secret-sources.js";
 import notificationChannelsRoutes from "./routes/notification-channels-routes.js";
@@ -1771,7 +1771,7 @@ app.use("/ui-preferences", uiPreferencesRoutes);
 app.use("/proxmox", proxmoxDispatch);
 app.use("/termix-id", termixIdRoutes);
 registerAuditLogRoutes(app, authenticateJWT);
-registerTailscaleRoutes(app, authenticateJWT);
+app.use("/tailscale", tailscaleDispatch);
 app.use("/vault", vaultRoutes);
 app.use("/secret-sources", secretSourceRoutes);
 app.use("/automations", automationsDispatch);