V160 - ACCOUNT MIRROR + NATIVE IMPORT/EXPORT + NAME UNLOCK - NO BACKUPS

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"1. Login connects BG2's literal characters path directly to characters_<accountname>.
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"2. Import and Export remain BG2's normal native screens and button actions.
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"3. Imported/completed characters can reopen the Name step.
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"4. The Name edit field is explicitly enabled.
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"5. Name DONE is available for any non-empty name and calls BG2's native OnDoneButtonClick().
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"6. After Name DONE, BG2's normal main ACCEPT button finishes character creation when IsChargenComplete() is true.
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"7. No automatic character backups, copy restore, or deleted-character respawn are added.
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