fix: QC matrix output changed from DOCX to XLSX (ExcelJS)

fix: move supported formats table from landing to /convert, fix ITT/TTAL/S890 status

fix: PMW writer/reader roundtrip — text now preserved through SRT→PMW conversion

feat: KNP terminology consistency check + AI translator credit detection

fix: boundary-aware sensitive term matching — eliminate substring false positives

GTS-X: Full HITL editor + QC + file converter for HuggingFace Spaces