xammen3/16/2026, 3:05:22 PM

- New JsonFileSettingsBag: stores settings in ./config/settings.json
- StorageFactory detects 'portable.marker' file next to exe
- If portable.marker exists: JSON file backend, no registry
- If not: normal Registry/WindowsStorage backend (unchanged)
- Portable mode can run from USB stick with zero system footprint
- Thread-safe with lock, auto-creates config/ directory

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