fix(isMobilePhone): fix es-PA regex to validate only Panamanian mobile numbers

[Shrawak]

Fixes #2433 — Panamanian mobile phone number regex was too permissive.

What changed

The previous regex /^(\+?507)\d{7,8}$/ had three problems:

1. Accepted any starting digit — Panamanian mobile numbers must start with 6
2. Wrong length — allowed 7 or 8 digits, mobile numbers are exactly 8 digits after country code
3. No hyphen support — valid format 6XXX-XXXX was rejected

The new regex /^(\+?507)6\d{3}-?\d{4}$/ enforces:

• Mobile prefix 6 after country code 507
• Exactly 8 digits total
• Optional hyphen (+507 6123-4567 and +50761234567 are both valid)

Before:

'+50712345678' // was valid ❌ (starts with 1, not 6)
'+5073456789'  // was valid ❌ (starts with 3, not 6)

After:

'+50761234567' // valid ✅
'+5076123-4567' // valid ✅
'+50712345678' // invalid ✅

References

References:

• https://en.wikipedia.org/wiki/Telephone_numbers_in_Panama

Checklist

• PR contains only changes related; no stray files, etc.
• README updated (where applicable)
• Tests written (where applicable)
• References provided in PR (where applicable)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (9fa1e3a) to head (0419be0).

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #2694   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files          114       114           
  Lines         2595      2595           
  Branches       659       659           
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  Hits          2595      2595           

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[Copilot]

Pull request overview

Updates the es-PA locale in isMobilePhone to properly validate Panamanian mobile numbers only (prefix 6, exact length, optional intra-number hyphen), aligning validation with the intended national format and tightening an overly permissive regex.

Changes:

• Tightened es-PA regex to require mobile prefix 6 and exact digit counts, with optional hyphen.
• Updated es-PA validator fixtures to reflect the corrected mobile-only behavior and add new invalid cases.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
src/lib/isMobilePhone.js	Replaces the es-PA regex to enforce Panama mobile number structure (6XXX-XXXX / 6XXXXXXX).
test/validators.test.js	Updates es-PA valid/invalid examples to match the new stricter Panama mobile validation.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

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