[djgraco]

This PR updates the Polish user guide following a native-speaker review. Several passages used older interface terminology, documented incorrect shortcuts or settings paths, or described behaviour too ambiguously. The changes make the instructions easier to follow, including when reading them with a screen reader.

The review covers:

• Interface terminology: chat categories, forwarding, last-seen information, chat access protection and the local vault.
• Default shortcuts and settings paths, including incoming-call actions and the Polish Messages menu.
• Explanations of local transcription, online AI processing, model selection, memory use and audio devices.
• Instructions for F5 resynchronization, backups, drafts and media cleanup, clarifying what each operation affects.
• More natural Polish wording and consistent use of “podręcznik” for the user guide.

The shortcut-table generator previously used the Portuguese range separator “a” in Polish output, producing ranges such as “Ctrl+Alt+1 a 9”. This PR adds a locale-specific range format so Polish uses “Ctrl+Alt+1 do 9”. Other locales retain their existing output. Four regression tests cover range formatting and grouping.

The Polish PO changes the Media tab label from “Multimedia” to “Media” to match the reviewed terminology. Its revision and template-reference dates are also updated. The four recently added business-button translations and the corresponding new guide content are preserved.

The shipped Polish HTML guide has been regenerated from the updated sources and catalog.

Validation completed locally on Windows:

• msgfmt --check --check-format: passed.
• uv run translations-check: passed for all seven locales, with zero pending entries.
• Polish guide generation: passed.
• uv run pytest tests/test_user_guide_shortcut_ranges.py tests/test_user_guide_coverage.py: 7 passed.
• git diff --cached --check: passed.

[pedro-hdias]

Hello, @djgraco! Thank you for this contribution! It was approved without further comments. We appreciate it! See you soon!