[misaelalves99]

Closes #1785.

Summary

Clarify the Datahub's rolling collection-date filters so their labels accurately describe the applied time windows.

Changes

• Replace ambiguous calendar-period labels with explicit rolling-period labels in English, Spanish, and French.
• Make the remaining collection-date presets consistently describe past periods.
• Clamp month and year offsets to valid calendar dates, preventing rollover errors at month-end and leap-year boundaries.
• Reuse shared timeframe calculation logic.
• Add unit and Playwright regression tests for filter labels and date-window behavior.

Validation

Validated against the original pinned contribution base:

• Vitest: 29/29 targeted unit tests passed.
• ESLint / Prettier: all 7 changed files passed.
• TypeScript: Web, Testing, and API checks passed.
• Playwright: 8/8 passed (5 setup, 2 targeted regressions, 1 teardown).
• Scope: exactly 7 files changed, with no additional dependencies or migrations.

The full monorepo suite was not run. The target main has advanced by 41 commits since the validated base; integration with the latest upstream remains subject to CI verification.

Implementation notes

• Preserves the intended rolling-window semantics instead of introducing calendar-period behavior.
• Includes regression coverage for shorter months and month-end boundaries.
• Keeps the change limited to collection-date filtering, shared timeframe logic, and associated tests.