~x-ai/grok-latest → A (8:1)

A deletes 1808-line legacy/parser.rs and adds a fully integrated parser (server/src/parser.rs + parser_action.rs + parser_render.rs + ui_html.rs changes + JS event wiring + integration tests) that wires the Reddit graph into live /ui morphs and primary_completion handling. B only appends one 40-line test in ranking.rs exercising an already-working spanning-tree scenario. The refactor+integration in A produces durable structure and behavior; B is incremental verification.