Address round-1 @claude review of #1588 (no behavior change to the
enforced policy):
- approveCspSources / buildSandboxCspPolicy: document that
resourceDomains intentionally feeds script-src/style-src per the
McpUiResourceCsp contract, and that approve screens injection-safety
only (not breadth — a bare `*` is accepted; safe under the
opaque-origin sandbox).
- CSP_KEYS: replace the `satisfies` (proves listed keys valid) with an
exhaustiveCspKeys() helper that ALSO fails to compile if the upstream
ext-apps type gains a domain key CSP_KEYS omits, so a requested
restriction can never be silently dropped.
- SAFE_CSP_SOURCE: accept case-insensitive schemes (URL schemes are
case-insensitive); previously over-rejected `HTTPS://…`. Adds tests.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S3fTN8H3R8YV4yUGvZjYnX
cb54de50d8