refactor(src/user/digest.js): simplify complex boolean with Array.every

[skkuwari-alt]

Summary
Refactors the complex boolean in 'digest.send' (file: src/user/digest.js) to improve readability and resolve a Qlty-reported maintainability smell.

Specific changes.

• Replaced a long chained '&' expression with named checks and 'Array.every(Boolean)'.
• No behavior change (pure refactor).

qtly
src/user/digest.js
112 Complex binary expression

Validation (Qlty, lint, tests, manual run).

• Qlty re-run shows the smell is gone.
• npm run lint passes with no errors.
• npm test passes with good coverage (mostly green)
• anual run: inserted temporary console.log("SALWA", userObj.uid) inside refactored code, restarted NodeBB, and observed the log line in test output, confirming the code path executes.
• Removed debug log after validation.

After
Resolves #61 #61

[skkuwari-alt]

Disreagrd. Meant for team repo