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a6f0aaf1cc
fix(filter-service, number-range-filter-input): resolve NumberRange state management and reference issues
**Root Cause:**
Filter service was experiencing reference sharing between current state and
committed state due to shallow copying in commit(), causing filters to
incorrectly appear as "changed" when mixing NumberRange with other filter
types like Checkbox.
**Changes Made:**
1. **State Management (filter.service.ts):**
- Use structuredClone() in commit() for deep copies to prevent reference sharing
- Update clear() to preserve structural properties (options array references)
- Refactor resetInput() to selectively copy only mutable properties while
preserving structural ones for isEqual() comparisons
- Simplify selectedFilterCount to use isDefaultFilterInput() consistently
2. **Default Values (number-range-filter-input.mapping.ts):**
- Parse minValue/maxValue from config (e.g., "1-" → 1) as defaults
- Use parsed defaults as initial min/max when no explicit value provided
**Impact:**
- NumberRange filters correctly display default values in UI
- Filters no longer incorrectly show as "changed" after multiple commits
- "Standardeinstellungen" works correctly when mixing NumberRange with other types
- selectedFilterCount accurately reflects changed filters including NumberRange
Ref: #5402