Add WASM module registry and admin panel extensibility via manifest convention#253
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Add WASM module registry and admin panel extensibility via manifest convention#253zyrakq wants to merge 2 commits into
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Made loaded WASM modules visible to administrators Allowed modules to present a branded identity in the dashboard Enabled modules to surface their own configuration UI in admin Equipped module authors with built-in admin access control Turn WASM into a first-class extension model for the admin Remove the need for a separate admin interface per extension Spare module authors from re-implementing admin access control
Introduced tb-html-fragment custom element that attaches a shadow root and injects fragment HTML inside it, replacing direct innerHTML assignment into a light-DOM container. Prevents WASM component settings pages from leaking styles/markup into or colliding with the admin app's own DOM and CSS, enforcing isolation at the injection point rather than relying on convention.
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Closes #252.
What this adds:
GET /_/admin/wasm-modules— new API endpoint listing all loaded modules with their metadata/wasm-modules— shows each module with icon, display name, and description/_/wasm/<file-stem>/manifestwith a JSON object:display_name,icon,description,config_path. The path segment must match the file-stem of the.wasmfile; a mismatch means the manifest is silently ignored. This makes the contract opt-in and collision-free/wasm-modules/:name— when a module declares aconfig_path, the admin fetches it with admin credentials and injects the returned HTML fragment. Script tags are re-cloned so module JS initializes correctlyis_admincheck added towasm-runtime-guest— since this feature opens the door to admin-panel extensions, module endpoints that serve management UI must be able to guard access. The project didn't previously need this in the guest crate, but shipping admin-facing modules without a built-in auth check would push that burden onto every extension author individuallyStyle isolation:
The settings fragment is injected directly into the admin page DOM, so TrailBase's own styles will bleed into it. Extension authors should wrap their settings UI in a Web Component using Shadow DOM to get full style isolation. This is the recommended approach for any
config_pathimplementation.Real-world example:
To verify the manifest convention end-to-end, wcauth-tb-component can be used as a test module — it already implements the manifest endpoint and exposes a settings page. Build it from source, place the resulting binary as wcauth.wasm in traildepot, and it should appear in the WASM Modules page with its manifest applied.
Compatibility:
Non-breaking. Modules without a manifest endpoint continue to work exactly as before and appear in the list using their file-stem as the display name.