Extract the standard form drawer (width 640, footer actions, destroyOnClose)
as FormDrawer; reuse existing usePolling hook. IntelligentEvals becomes the
first consumer — create drawer and both 5s pollings switched with zero
behaviour change. Includes ui-consistency spec, tickets, and ADR-0005.
Give EvalRun.summary a typed RunSummary value (unified RunError, lenient
legacy parsing) so readers stop reaching into a schemaless dict, and route
every cross-run rollup — dashboard, scenario ranking, trend, campaign
report — through one aggregate_runs seam. Fixes the divergence where
stats averaged pass_rate over completed-only runs while the campaign
report counted faults as 0.0. Cross-run rule (ADR-0004): genuine faults
count 0.0, user-cancelled runs are excluded from both denominators.
