feat(trail): search-style cards for findings in a color terminal

entire trail finding, finding list, finding show and finding add get a styled view on a color terminal, laid out like entire search:

• open findings are cards, most severe first, with the summary wrapped to two lines and the age right-aligned; resolved and dismissed findings collapse to one line under Done
• the dashboard keeps its totals, reports open findings the filters hide, and says when a page is partial
• finding show uses sections, prints the body as written (no markdown rendering, which rewrote identifiers), and prints patches flush-left with diff colors so they still apply

Pipes, NO_COLOR and --json keep the plain output, pinned by goldens.