Templates tree hides IsDerived templates by default. A "Show derived"
form-switch in the page header toggles them into the listing so users
can reach orphaned derived templates when they need to.
TemplateEdit:
- Banner on derived templates: links to the base + the composing owner /
slot name pulled from OwnerCompositionId.
- Attributes/Scripts tables grew a context-aware column:
* On derived templates: a Source badge (Inherited / Override / Local)
plus a 🔒 Base-locked badge when the base marks LockedInDerived.
* On base templates: a switch that flips LockedInDerived through
UpdateAttribute/UpdateScript.
- Effective Value / Code now resolves from the base when an inherited row
carries a stale snapshot — matches the flatten-time behavior so the UI
doesn't lie.
- Override / Revert-to-base actions added to the row kebab; delete is
hidden on inherited rows (the base owns those).
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