feat: managed entities (read-only) + AbleSign auto-creates entity

- Entity type: add 'ablesign' to EntityType + CellContentType
- Entity.managed boolean: true for auto-created entities (camera sync,
  cloud cams, AbleSign). UI blocks editing managed entities.
- Entity.ablesign_screen_id: links to ablesign_screens row
- ensureCameraEntity now sets managed=true
- AbleSign screen creation auto-creates managed entity with
  web_url=player.ablesign.tv and ablesign_screen_id FK
- PG migration: alter entities CHECK constraint + add columns
- Entity edit route rejects POST for managed entities

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server/src/plugins/service-admin-http/routes-ablesign.ts

@@ -96,15 +96,34 @@ export function registerAbleSignRoutes(app: H3, deps: AdminDeps): void {
     try {
       const apiKey = deps.secrets.decryptString(account.api_key_encrypted, "ablesign-key");
       const opts = { apiKey, workspaceId: account.workspace_id || undefined };
-      const { screen } = await ablesign.headlessPairScreen(opts, title);
+      const { screen, registrationCode } = await ablesign.headlessPairScreen(opts, title);
 
-      await deps.repo.createAbleSignScreen({
+      // Poll once for token (may not be available immediately).
+      let screenToken: string | undefined;
+      try {
+        const poll = await ablesign.pollRegistration(registrationCode);
+        screenToken = poll.screenToken;
+      } catch { /* token may not be ready yet — kiosk can work without it initially */ }
+
+      const screenRowId = await deps.repo.createAbleSignScreen({
         account_id: accountId,
         ablesign_screen_id: String(screen.id),
+        ablesign_screen_token_encrypted: screenToken
+          ? deps.secrets.encryptString(screenToken, "ablesign-token")
+          : undefined,
         title: screen.title,
         orientation: screen.orientation,
       });
 
+      await deps.repo.createEntity({
+        name: `AbleSign: ${screen.title}`,
+        type: "ablesign",
+        description: `AbleSign screen (ID: ${String(screen.id)})`,
+        web_url: "https://player.ablesign.tv",
+        ablesign_screen_id: screenRowId,
+        managed: true,
+      });
+
       await deps.repo.updateAbleSignAccount(accountId, {
         screen_count: (account.screen_count ?? 0) + 1,
       });

server/src/plugins/service-admin-http/routes-admin.ts

@@ -790,6 +790,9 @@ export function registerAdminRoutes(app: H3, deps: AdminDeps): void {
     const id = (getRouterParam(event, "id") ?? "");
     const ent = await deps.repo.getEntityById(id);
     if (!ent) return new Response(null, { status: 302, headers: { location: "/admin/entities" } });
+    if ((ent as any).managed) {
+      return new Response(null, { status: 302, headers: { location: `/admin/entities/${String(id)}` } });
+    }
     const body = await readBody<Record<string, string>>(event);
     const patch: {
       name?: string;

server/src/shared/db/mappers.ts

@@ -258,6 +258,8 @@ export function rowToEntity(r: Row): Entity {
     html_content: sn(r["html_content"]),
     web_url: sn(r["web_url"]),
     dashboard_id: sn(r["dashboard_id"]),
+    ablesign_screen_id: sn(r["ablesign_screen_id"]),
+    managed: !!r["managed"],
     created_at: s(r["created_at"]),
   };
 }

server/src/shared/db/migrations-pg.ts

@@ -514,6 +514,12 @@ export const TENANT_MIGRATIONS: readonly string[] = [
   `CREATE INDEX IF NOT EXISTS idx_ablesign_screens_account ON ablesign_screens(account_id)`,
   `CREATE INDEX IF NOT EXISTS idx_ablesign_screens_kiosk ON ablesign_screens(kiosk_id)`,
 
+  // Add ablesign entity type + ablesign_screen_id column to entities
+  `ALTER TABLE entities DROP CONSTRAINT IF EXISTS entities_type_check`,
+  `ALTER TABLE entities ADD CONSTRAINT entities_type_check CHECK(type IN ('camera', 'html', 'web', 'dashboard', 'ablesign'))`,
+  `ALTER TABLE entities ADD COLUMN IF NOT EXISTS ablesign_screen_id TEXT REFERENCES ablesign_screens(id) ON DELETE CASCADE`,
+  `ALTER TABLE entities ADD COLUMN IF NOT EXISTS managed BOOLEAN NOT NULL DEFAULT false`,
+
   // ---- UUIDv7 PK migration for existing databases ----
   // Databases created before UUIDv7 migration have INTEGER PKs.
   // This migration converts them to TEXT in-place. Safe to run on

server/src/shared/db/repository.ts

@@ -2307,11 +2307,13 @@ export class Repository {
     html_content?: string | null;
     web_url?: string | null;
     dashboard_id?: string | null;
+    ablesign_screen_id?: string | null;
+    managed?: boolean;
   }): Promise<Entity> {
     const id = uuidv7();
     await this._run(
-      `INSERT INTO entities (id, name, type, description, camera_id, html_content, web_url, dashboard_id)
-       VALUES (?, ?, ?, ?, ?, ?, ?, ?)`,
+      `INSERT INTO entities (id, name, type, description, camera_id, html_content, web_url, dashboard_id, ablesign_screen_id, managed)
+       VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
       [
         id,
         input.name,
@@ -2319,8 +2321,10 @@ export class Repository {
         input.description ?? null,
         input.type === "camera" ? (input.camera_id ?? null) : null,
         input.type === "html" ? (input.html_content ?? null) : null,
-        input.type === "web" ? (input.web_url ?? null) : null,
+        input.type === "web" || input.type === "ablesign" ? (input.web_url ?? null) : null,
         input.type === "dashboard" ? (input.dashboard_id ?? null) : null,
+        input.type === "ablesign" ? (input.ablesign_screen_id ?? null) : null,
+        input.managed ?? false,
       ],
     );
     void this.notify("entities", "create", id);
@@ -2405,7 +2409,7 @@ export class Repository {
     if (await this.getEntityByName(name)) {
       name = `${camera.name} (cam ${camera.id.slice(0, 8)})`;
     }
-    return this.createEntity({ name, type: "camera", camera_id: camera.id });
+    return this.createEntity({ name, type: "camera", camera_id: camera.id, managed: true });
   }
 
   async updateKiosk(id: string, patch: Partial<Kiosk>): Promise<void> {

server/src/shared/types.ts

@@ -12,8 +12,8 @@ export type StreamRole = "main" | "sub" | "other";
 export type StreamSelector = "auto" | "main" | "sub";
 export type StreamPolicy = "auto" | "always_main" | "always_sub";
 export type LayoutPriority = "hot" | "normal" | "cold";
-export type CellContentType = "none" | "camera" | "web" | "html";
-export type EntityType = "camera" | "html" | "web" | "dashboard";
+export type CellContentType = "none" | "camera" | "web" | "html" | "ablesign";
+export type EntityType = "camera" | "html" | "web" | "dashboard" | "ablesign";
 
 export interface Entity {
   id: string;
@@ -25,6 +25,10 @@ export interface Entity {
   web_url: string | null;
   /** Node-RED dashboard tab id; populated when type === "dashboard". */
   dashboard_id: string | null;
+  /** AbleSign screen row id; populated when type === "ablesign". */
+  ablesign_screen_id: string | null;
+  /** True for entities auto-created by camera sync, cloud cams, AbleSign. Read-only in UI. */
+  managed: boolean;
   created_at: string;
 }
 export type DesiredPowerState = "follow_layout" | "on" | "standby";