Kept full-root rendering as the default after input and introduced an explicit host opt-in for stable-focus subtree repainting. The coding-agent default composer opts in, while extension-provided editors and other TUI consumers retain callback-safe full composition.
Scoped ordinary input frames to the focused component while retaining a full compose when input moves focus. Explicitly repainted the coding-agent pending-message sibling and covered stable focus, wrapped growth, focus movement, and queue clearing.
Fixes#5928
Allowed fully live, uncommitted anchored status segments to use the direct-write path so the production working loader avoids the full render pipeline.
Added regression coverage for nested loaders inside anchored live status containers.
Added a direct-write path for quiet visible component segments so Loader animation rewrites only its known rows instead of scheduling the full render pipeline.
Updated Loader scheduling and regression coverage for direct-write fast paths and overlay fallback behavior.
Fixes#5192
Chess Luo