[Change] Hero banner: multi-stage scan pipeline replaces generic line chart

[Change] Differentiate LMD banner from BFD: replace time-series chart with
         horizontal scan pipeline (MD5→SHA256→HEX→YARA→STRING stages),
         file-with-crosshair icon, sig-type prefixed tickers, per-stage
         threat detection markers with quarantine/clean action labels

Author: rfxn