The #9316 merge auto-resolve left a duplicated '});' at
@omniroute/opencode-plugin/src/index.ts:5481. The plugin is a standalone
package (outside typecheck:core and both test runners), so nothing parses
it until the release build — where tsup's DTS step fails with a cascade of
"Cannot find name" errors. The same syntax error also blocked prettier
from parsing the file, so this commit necessarily carries the prettier
pass lint-staged applies on staging (formatting was frozen since the bad
merge).
Adds tests/unit/opencode-plugin-parses.test.ts: parses every plugin source
file with the TypeScript compiler and fails on syntax diagnostics, so the
next merge-resolve accident in this uncovered package dies in the unit
suite instead of at release-build time.
Validated: release build:cli passes on the 192.168.0.113 build box with
this hotfix applied.
Refs #9985
