feat: add reusable content fragments

src/govoplan_templates/backend/manifest.py

@@ -23,6 +23,7 @@ from govoplan_core.core.modules import (
 from govoplan_core.core.provider_governance import declared_module_architecture
 from govoplan_core.core.templates import (
     CAPABILITY_TEMPLATE_CATALOG,
+    CAPABILITY_TEMPLATE_CONTENT_LIBRARY,
     CAPABILITY_TEMPLATE_RENDERER,
 )
 from govoplan_core.core.views import ViewSurface
@@ -95,6 +96,41 @@ DOCUMENTATION = (
             ],
         },
     ),
+    DocumentationTopic(
+        id="templates.reusable-content",
+        title="Reusable content fragments and campaign parts",
+        summary="Create scoped, versioned content that authorized consumers can insert without copying a private library.",
+        body=(
+            "Content fragments retain text and HTML variants, usage constraints, locale, scope, revision, and publication state in Templates. "
+            "Campaign can load a fragment or complete email part through the optional content-library capability. Saving from Campaign creates "
+            "a draft and never publishes it automatically. Inserting content changes only the current Campaign draft; existing Campaign versions "
+            "and Template revisions remain unchanged."
+        ),
+        layer="available",
+        documentation_types=("admin", "user"),
+        audience=("operator", "module_admin", "campaign_author"),
+        related_modules=("campaigns",),
+        translations={
+            "de": {
+                "title": "Wiederverwendbare Inhaltsbausteine und Kampagnenteile",
+                "summary": "Bereichsbezogene, versionierte Inhalte erstellen und in berechtigten Modulen verwenden.",
+                "body": (
+                    "Inhaltsbausteine speichern Text- und HTML-Fassungen, Verwendungszwecke, Sprache, Geltungsbereich, Revision und "
+                    "Veröffentlichungsstatus in Templates. Campaign kann Bausteine oder vollständige E-Mail-Teile über die optionale "
+                    "Inhaltsbibliothek laden. Das Speichern aus Campaign legt einen Entwurf an und veröffentlicht ihn niemals automatisch. "
+                    "Das Einfügen ändert nur den aktuellen Kampagnenentwurf; bestehende Kampagnenversionen und Template-Revisionen bleiben unverändert."
+                ),
+            }
+        },
+        metadata={
+            "seed": True,
+            "help_contexts": [
+                "templates.field.type",
+                "templates.field.usages",
+                "campaign.template.content-library",
+            ],
+        },
+    ),
     DocumentationTopic(
         id="templates.printable-output",
         title="Printable template output",
@@ -176,6 +212,12 @@ def _renderer(context: ModuleContext):
     return renderer_capability(context)
 
 
+def _content_library(context: ModuleContext):
+    from govoplan_templates.backend.capabilities import content_library_capability
+
+    return content_library_capability(context)
+
+
 def _tenant_summary(session, tenant_id: str) -> dict[str, int]:
     return {
         "templates": session.query(template_models.TemplateDefinition).filter(
@@ -197,6 +239,10 @@ manifest = ModuleManifest(
     optional_capabilities=(CAPABILITY_FILES_ARTIFACT_STORE,),
     provides_interfaces=(
         ModuleInterfaceProvider(name=CAPABILITY_TEMPLATE_CATALOG, version=MODULE_VERSION),
+        ModuleInterfaceProvider(
+            name=CAPABILITY_TEMPLATE_CONTENT_LIBRARY,
+            version=MODULE_VERSION,
+        ),
         ModuleInterfaceProvider(name=CAPABILITY_TEMPLATE_RENDERER, version=MODULE_VERSION),
     ),
     requires_interfaces=(
@@ -248,6 +294,7 @@ manifest = ModuleManifest(
     route_factory=_router,
     capability_factories={
         CAPABILITY_TEMPLATE_CATALOG: _catalog,
+        CAPABILITY_TEMPLATE_CONTENT_LIBRARY: _content_library,
         CAPABILITY_TEMPLATE_RENDERER: _renderer,
     },
     tenant_summary_providers=(_tenant_summary,),