feat(web): redesign analysis as an Ops console#135

fix(web): retain keyboard focus when moving chart cards

fix(web): fit fine-pointer rail controls above the fold

fix(web): reflow resized chart panels without reserved gaps

fix(web): replace Layout dropdown with direct card actions

fix(web): narrow filter rail with compact option grids

fix(web): align analysis toolbar and group filter summary

fix(web): rename traffic selection to Metrics

fix(web): distinguish router lines and legend colors

fix(web): restore spectrum hue gradient in both themes

fix(web): cancel pending filter sheet open on Escape

perf(web): avoid duplicate fractional chart renders and defer filter sheet

fix(web): preserve source recovery and readable console controls

feat(web): reorganize analysis into an ops console

test(web): wait for hydration before editing reversed dates

test(web): scope date feedback assertion to validation message

test(web): restore populated bounds in date feedback regression

fix(web): preserve chart hover and clarify narrow file headings

feat(web): unify chart palette and add keyboard layout controls

feat(web): introduce compact analysis workbench design system