feat(campaign): complete reusable template workflow

webui/tests/template-preview-draft.test.ts

@@ -1,4 +1,5 @@
 import { campaignJsonForAttachmentPreview } from "../src/features/campaigns/utils/templatePreviewDraft";
+import { checkContentLibraryCompatibility } from "../src/features/campaigns/utils/contentLibraryCompatibility";
 
 function assert(condition: unknown, message = "assertion failed"): void {
   if (!condition) throw new Error(message);
@@ -52,3 +53,18 @@ assert(to.length === 1 && to[0].email === "alice@example.org", "empty recipient
 assert(defaults.email === undefined, "empty defaults email is stripped");
 assert(Array.isArray(defaults.to) && (defaults.to as unknown[]).length === 0, "empty defaults recipients are removed");
 assert((asRecord(draft.entries).inline as Record<string, unknown>[])[0].email === "", "original draft is not mutated");
+
+const compatibility = checkContentLibraryCompatibility([
+  { path: "local::display_name", value_type: "string", label: "Display name", required: true },
+  { path: "global.case_reference", value_type: "string", label: "Case reference", required: true },
+  { path: "count", value_type: "number", label: "Count", required: true },
+  { path: "local.to.2.email", value_type: "string", label: "Second recipient", required: true },
+  { path: "optional", value_type: "string", required: false }
+], new Map([
+  ["local:display_name", "string"],
+  ["local:to", "string"],
+  ["count", "boolean"]
+]));
+assert(!compatibility.compatible, "missing or wrong-typed fields are incompatible");
+assert(compatibility.missing.length === 1 && compatibility.missing[0].path === "global:case_reference", "namespaced missing fields are normalized");
+assert(compatibility.incompatible.length === 1 && compatibility.incompatible[0].actual === "boolean", "type mismatches are reported");