TypeScript Foundation

[maruson08]

Goal

Establish a strict, incremental TypeScript foundation for Secure Tools without a repository-wide rewrite or changes to public behavior.

Scope

• Audit browser, shared, Node, test, locale, generated, and vendored JavaScript boundaries.
• Add locked TypeScript compiler tooling and strict configuration.
• Preserve JavaScript and TypeScript coexistence.
• Integrate controlled browser-module compilation with the manifest-driven static build.
• Migrate a small set of shared, contract-focused first-party modules.
• Require npm run typecheck in CI.
• Add regression checks for emitted JavaScript, excluded TypeScript/source maps, routes, redirects, OCR, privacy, CSP, and six locales.
• Document the incremental migration policy.

Exclusions

• No full JavaScript rewrite.
• No framework or bundler introduction.
• No vendor/generated-code conversion.
• No URL behavior changes.
• No PDF OCR, Searchable PDF, or unrelated feature work.

[maruson08]

Completed by merged PR #97. The TypeScript foundation is verified on v2.2.