PR #19 (572bb4ef) swapped CharSections.dbc field indices, placing
Texture1-3 at fields 4-6 and VariationIndex/ColorIndex at 8-9. Binary
analysis of the actual DBC files (Classic, TBC, Turtle — all identical
layout, no WotLK-specific override) confirms the correct order is:
Field 4 = VariationIndex
Field 5 = ColorIndex
Field 6 = Texture1 (string)
Field 7 = Texture2 (string)
Field 8 = Texture3 (string)
Field 9 = Flags
With the wrong indices, VariationIndex/ColorIndex reads returned string
offsets (garbage values that never matched), so all CharSections lookups
failed silently — producing white untextured character models at the
login screen and in-world.
Fixes all 4 expansion JSON layouts, hardcoded fallbacks in
character_preview.cpp, application.cpp, and character_create_screen.cpp.
Also handles the single-layer edge case (body skin only, no face/underwear)
by loading the texture directly instead of skipping compositing.
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