tlc: visual polish V1-V6 — focused borders, sparkline, size coloring, fractional gauge, color cache, disk-free
V1: Focused panel border — active uses theme.accent+BOLD, inactive uses darken(border,30)
V2: Transfer-rate sparkline in ProgressDialog — ring buffer, 0.5s throttle, block glyphs
V3: Dynamic file-size coloring — warmth gradient by size (GB+20, 100MB+12, 10MB+6, 1MB+3, <512B dim)
V4: Sub-cell fractional progress bars — 8x resolution via ▏▎▍▌▋▊▉█ glyphs
V5: Pre-resolve MC skin color pairs — global Mutex<HashMap> cache, null-separated key
V6: Disk-free indicator in status bar — df subprocess, green/yellow/red thresholds
1381 tests pass (+12 new)
vasilito
193d2926d0