refactor(advanced-settings-dialog): extract __init__ into smaller methods to fix R0914

[josiasdev]

Why this change is necessary

The __init__ method of AdvancedSettingsDialog had 144 statements, far exceeding Pylint's default limit of 50 (R0914 – too-many-statements). This made the method hard to read, test, and maintain. All UI construction logic was concentrated in a single method.

How it was tested

• Run pytest -k advanced_settings — 19/19 tests passed (the only failure in the suite is a pre-existing locale issue in TestLanguagesComboBox, unrelated to this change)
• Pylint check with --enable=R0914 now passes with a score of 10.00/10
• Python syntax verified with ast.parse

Notes for the reviewer

The refactoring is purely structural — no behavior or logic was changed. The original __init__ body was split into four private methods:

Method	Responsibility
_setup_transcription_section	Initial prompt widget
_setup_translation_section	LLM translation checkbox, model, prompt, info button
_setup_recording_section	Silence threshold, recording mode, line separator, transcription step, hide unconfirmed, export settings
_setup_button_box	OK button

All references to the local parameter transcription_options inside the extracted methods were changed to self.transcription_options (the instance attribute already set in __init__).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.86%. Comparing base (f00473f) to head (35bcc7e).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1538      +/-   ##
==========================================
+ Coverage   82.83%   82.86%   +0.03%     
==========================================
  Files         108      108              
  Lines       11620    11627       +7     
==========================================
+ Hits         9625     9635      +10     
+ Misses       1995     1992       -3     

Flag	Coverage Δ
Linux	81.62% <100.00%> (+0.01%)	⬆️
macOS	82.37% <100.00%> (+0.03%)	⬆️

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