fresh CVL editor renders controls, sections, and preview surface

Broad CareerVector browser e2e: dashboard table, kanban board, views with group reorder, routing, layout (incl. zoomed), keyboard navigation, BYOK key entry + chain resolution, realtime collaboration over the canonical Y.Doc relay, synthetic workspace lifecycle and cleanup, MCP dispatch from the browser, profile/notes persistence, read-only workspace views, status centre frugality, perf smokes, and the import-to-tailor synthetic journey. Acts as the catch-all e2e gate for ui/e2e/*.spec.ts that is not story-, perf-, or persistence-scoped.

Routine browser proof for the most important local development loop. This is the standard browser QA gate and runs only on the corbet/unraid runner.