qrlogin: fix Export method to handle all AuthExportLoginToken response types

[fr0ster]

Problem

The Export method in qrlogin package only handled *tg.AuthLoginToken response type from AuthExportLoginToken API call, but the API can return other types like *tg.AuthLoginTokenSuccess and *tg.AuthLoginTokenMigrateTo, which would cause "unexpected type" errors.

Solution

Added proper handling for all possible response types:

• AuthLoginToken: normal case, returns new token
• AuthLoginTokenSuccess: token already accepted, returns appropriate error
• AuthLoginTokenMigrateTo: migration needed, returns MigrationNeededError

Changes

• Modified Export method to use switch statement instead of simple type assertion
• Added proper error handling for each response type
• Maintains backward compatibility

This fix prevents runtime panics when AuthExportLoginToken returns unexpected (but valid) response types.

[codecov]

Codecov Report

Attention: Patch coverage is 42.10526% with 11 lines in your changes missing coverage. Please review.

Project coverage is 68.75%. Comparing base (6de998a) to head (a219bea).

Files with missing lines	Patch %	Lines
telegram/auth/qrlogin/qrlogin.go	42.10%	9 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1571      +/-   ##
==========================================
- Coverage   69.00%   68.75%   -0.25%     
==========================================
  Files         443      443              
  Lines       21530    21545      +15     
==========================================
- Hits        14856    14813      -43     
- Misses       5740     5787      +47     
- Partials      934      945      +11     

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[fr0ster]

📝 Changes Made

✅ Fixed Commit Messages

Fixed all commit messages to follow Conventional Commits standard as required by commitlint:

• Changed qrlogin: fix ... → fix(qrlogin): ...
• Changed feat(vscode): ... → feat(qrlogin): ... (corrected scope)

📊 Significantly Improved Test Coverage

Added comprehensive tests to address codecov feedback:

Overall coverage: 67.0% → 84.6% (+17.6%)

Method-specific improvements:

• MigrationNeededError.Error(): 0% → 100% ✅
• OnLoginToken(): 0% → 100% ✅
• Token.Image(): 0% → 75% ✅
• Import(): 43.5% → 82.6% ✅

🧪 New Tests Added

• TestMigrationNeededError_Error - Tests error message formatting
• TestOnLoginToken - Tests login token handler setup and channel communication
• TestToken_Image - Tests QR code image generation with different quality levels
• TestQR_Import_WithMigration - Tests Import method with successful migration
• TestQR_Import_MigrationError - Tests Import method when migration fails

🎯 Coverage Issues Addressed

This PR addresses the codecov report showing 42.10% patch coverage with 11 missing lines. The new tests specifically target the previously uncovered code paths in:

• Error handling methods
• QR code generation
• Migration scenarios
• Login token event handling

The commitlint check should now pass ✅ and codecov coverage should be significantly improved 📈