Implements a new download path configuration UI and backend logic:
- Add Subfolder fill mode: Suggested (existing), Template, Manual
- Add Base Model Path Mappings to override detected base-model folders
- Add Default Root settings to control root directory per category
- Add Detect From Existing Folders button that infers templates and mappings from local model folders
- Add backend /model_resolver/root-directories and /model_resolver/path-template-suggestions routes
- Refactor resolver settings into core/settings.py for shared frontend/backend use
- Extract path template inference logic into core/path_templates.py
- Update download panel, context menu, and loading flow to use new path settings
Dariusz L
47d286620f