Lift to SpeziSpeech 1.0, NavigationBar item improvements

[philippzagar]

Lift to SpeziSpeech 1.0, NavigationBar item improvements

♻️ Current situation & Problem

SpeziChat is still dependent on an old tagged version of SpeziSpeech.
In addition, the navigation bar share icon always allocates space (even when the icon is not shown - initially done for animation purposes), leading to issues with Views reusing the ChatView while adding navigation bar items.

⚙️ Release Notes

• Lift SpeziChat to tagged 1.0.0 version of SpeziSpeech.
• Adjust navigation bar item behaviour of export button

📚 Documentation

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✅ Testing

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📝 Code of Conduct & Contributing Guidelines

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• I agree to follow the Code of Conduct and Contributing Guidelines.

[Supereg]

Thanks for updating SpeziChat. Also good we simplified some of the ToolbarItem placement.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (8817bf4) 82.93% compared to head (7f2da02) 82.86%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #7      +/-   ##
==========================================
- Coverage   82.93%   82.86%   -0.07%     
==========================================
  Files           9        9              
  Lines         451      449       -2     
==========================================
- Hits          374      372       -2     
  Misses         77       77              

Files	Coverage Δ
Sources/SpeziChat/ChatView.swift	82.76% <100.00%> (-0.57%)	⬇️

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