L2 Aufträge & Backoffice: Service-Schicht Aufträge + Tests

Statusmaschine (transitionWorkOrder inkl. eventData), Zuweisung, Completion-Guards,
Materialvorgabe, Checklisten/Pflichtfotos, Liste/Dashboard-Presets, Suche,
Sync-Konflikte, Einstellungen (Auftragsarten, Vorlagen, Nummernkreise).
Tests: Übergangsmatrix je Rolle, Kernlogik, Scope/Mandantentrennung, Nummernkreis-Parallelität.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/lib/work-orders/action-state.ts

@@ -0,0 +1,17 @@
+import type { CompletionBlocker } from "@/lib/work-orders/status";
+
+/** Result of a work order server action (client-safe; rendered by components/work-orders/action-form.tsx). */
+export type ActionState =
+  | { status: "idle" }
+  | { status: "ok"; at: number }
+  | {
+      status: "error";
+      /** ServiceError code: not_found | forbidden | invalid | conflict | blocked | internal */
+      code: string;
+      /** message key below `errors.` (falls back to the code) */
+      message: string;
+      blockers?: CompletionBlocker[];
+      at: number;
+    };
+
+export const IDLE_STATE: ActionState = { status: "idle" };