Second UI-rework pass. The job workspace mockup's signature element is
a donut "coverage" ring for the deterministic CV match score; the app
had a linear progress bar instead. Replaced with a layered
CircularProgress ring (track + value arc, percentage centered) while
keeping every existing feature (band chip, matched/missing keyword
chips, section coverage) -- this is a pure visual upgrade to the
existing MatchScoreCard, not a feature reduction to match the mockup's
simpler single-panel layout.
Fixed match-score-panel.test.tsx's no-signal-state assertion, which
expected the removed inline "—" placeholder; restored it outside the
ring's conditional render.
cesnimda