Sync wiki with docs/ at c57b573
Sync wiki with docs/ at 53de091
Sync wiki with docs/ at ca3a675 Adds the Design System page — token vocabulary, the two vendored faces, control heights and radii, the icon grid, and the accessibility floors with the pairings that currently fall short of them. Also brings across drift that had accumulated since the last sync: the CI cost section, the Smoke Test Checklist, the macOS signing setup, and the licenseFile warning in Platform Notes.
docs: sync — backend test layers, Phase 0 counts
docs: sync wiki with docs/ — add Phase 1 plan, fix cross-links, MSRV 1.88
docs: publish Flume wiki (architecture, engine notes, platform, CI, roadmap)