chore(deps): consolidate Dependabot updates and adopt TypeScript 7

[GeekTrainer]

Summary

• Consolidates the nine open Dependabot PRs (Bump actions/setup-node from 6 to 7 #1–Bump @types/node from 26.1.1 to 26.1.2 #9) into a single update.

• npm dependencies: astro ^7.1.2→^7.1.4 & @astrojs/check ^0.9.9→^0.9.10 (astro group, Bump the astro group with 2 updates #4), @playwright/test ^1.61.1→^1.62.0 (Bump @playwright/test from 1.61.1 to 1.62.0 in the playwright group #5), eslint ^10.7.0→^10.8.0 (Bump eslint from 10.7.0 to 10.8.0 #7), globals ^17.7.0→^17.8.0 (Bump globals from 17.7.0 to 17.8.0 #8), @types/node ^26.1.1→^26.1.2 (Bump @types/node from 26.1.1 to 26.1.2 #9).

• GitHub Actions: actions/checkout 5→7 (Bump actions/checkout from 5 to 7 #2), actions/setup-node 6→7 (Bump actions/setup-node from 6 to 7 #1), actions/upload-artifact 5→7 (Bump actions/upload-artifact from 5 to 7 #3). Also bumped the Playwright container image 1.61.1-noble→1.62.0-noble to match @playwright/test.

• TypeScript 7 (split-brain, Bump typescript from 5.9.3 to 7.0.2 #6): typescript-eslint and @astrojs/check cannot run on the native TS 7 compiler yet — ESLint hard-fails with "typescript-eslint does not support TS 7.0". Following the TS 7.0 announcement's Running Side-by-Side with TypeScript 6.0, the bare typescript import is aliased to the TS 6 API package for linting/type-checking, while TS 7 is installed for building:

  • "typescript": "npm:@typescript/typescript6@^6.0.2" → lint + astro check
  • "@typescript/native": "npm:typescript@^7.0.2" → tsc / build

  The two packages expose distinct bins (tsc6 vs tsc), so there is no conflict.

Validation

• npm run lint — passes on the TS 6 API (0 errors)
• npm run typecheck — astro check, 0 errors / 0 warnings
• npm run test:unit — 14 passed
• npm run test:e2e — 5 passed (run with PLAYWRIGHT_PORT=4399 to avoid a local 4321 clash)
• npm run build — completes

Screenshots or notes

• min-release-age note: this environment sets npm min-release-age = 7, and several Dependabot targets (astro, eslint, globals, @types/node, @astrojs/check, @playwright/test) were published within the last 7 days, so a normal npm install cannot resolve them yet. The lockfile here was generated with the age gate lifted for that single install only (no config was persisted); CI/npm ci will resolve normally once the versions age past the window (within a few days). astro resolved to the latest ^7.1.4 patch (7.1.5).
• Follow-up: revisit the split-brain once typescript-eslint ships native TS ≥7.1 support (typescript-eslint#10940); at that point the typescript alias can be collapsed back to a single TS 7 dependency.
• Once merged, the nine superseded Dependabot PRs (Bump actions/setup-node from 6 to 7 #1–Bump @types/node from 26.1.1 to 26.1.2 #9) can be closed.