TEX-002: Per-Scene Segmentation

Status: implemented Component: Font System Implementation: font_atlas.c - implements per-scene font atlas segmentation Updated by: from-minimax-01 (2026-05-09T1049Z)

Key Features: - 7 predefined font segments (BASIC, EXTENDED, JP, CYRILLIC, SYMBOLS, ICONS, CUSTOM) - 4 predefined scene configurations (TERMINAL, TERMINAL_EXTENDED, FULL, MINIMAL) - Scene-based loading: load entire scene’s fonts at once - Character lookup: find which font contains a specific character - No cross-scene sharing (per TEX-002 pattern)

Validation Criteria: - [x] Create segmented font atlases - [x] Load appropriate segments on demand - [x] Switch between segments efficiently - [x] Scene-based loading/unloading - [x] Memory usage within budget

Test Coverage: 10 tests covering init, segment info, loading, scene loading, character lookup, pattern info, validation, scene switching, segment count, predefined scenes