fix: correct find precedence in jsdoc-validation and deploy from dist/ in deploy-s3

[Copilot]

Two workflow bugs: find operator precedence causing over-broad file matching, and Vite build output being ignored during S3 deployment.

Changes

• jsdoc-validation.yml: Wrap -name predicates in parentheses so -o is scoped to the target directories, not the entire filesystem

  # Before — matches *.ts everywhere due to -o binding
  find src/browser scripts -name "*.js" -o -name "*.ts"
  
  # After — correctly constrained to specified directories
  find src/browser scripts \( -name "*.js" -o -name "*.ts" \)

• deploy-s3.yml: Change SRC="." → SRC="dist" so all aws s3 sync commands deploy Vite-built artifacts instead of source files — the build step was effectively a no-op before this fix

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