Improve teacher workflows, security, and deployment

[gafapa]

What changed

• Adds guided teacher onboarding, a daily teaching workspace, attendance history, academic periods, tutoring workflows, and faster planning and grading actions.
• Strengthens local data handling with encrypted backups, an optional application lock, safer imports/exports, validation, error recovery, and online-state feedback.
• Improves accessibility, responsive navigation, empty states, reports, scheduling, and teacher-facing terminology.
• Adds PWA assets, hardened response headers, CI, linting, audit and cleanup scripts, plus separate test and production build modes.
• Documents deployment for test.profeplus.gallego.top and profeplus.gallego.top.

Why

The previous application covered core records but did not provide a complete first-run path or a cohesive day-to-day workflow for teachers with different responsibilities. Operational safeguards, automated verification, and root-domain deployment configuration were also incomplete.

Impact

Teachers get a clearer setup path and practical flows for planning, teaching, attendance, grading, tutoring, reporting, and handoff. Maintainers get repeatable quality checks and deployment-ready builds.

Validation

• npm run verify
• 30 test suites / 176 tests passed
• ESLint and TypeScript checks passed
• Test and production builds passed
• Dependency and repository audit passed
• Both public domains verified over HTTPS, including SPA route fallback, manifest, service worker, and rendered browser UI