- Gallery fixtures gained a `renderState` hook to render non-standard component states.
- Added a `read_group` filesystem fixture that uses `ReadToolGroupComponent` to render delimited, full-file, and range read states.
- Added gallery CLI coverage to verify grouped read fixture output and expected ranges.
- Removed the built-in `background` (`bg`) slash command and its `handleBackgroundCommand` path from the interactive flow.
- Deleted background event subscription and shutdown handling by removing `handleBackgroundEvent` from the event, input, and interactive controllers.
- Simplified `InteractiveModeContext` by dropping background-only fields and helpers such as `isBackgrounded`, background UI context creation, and background event callbacks.
- Fixed custom-rendered tools with `mergeCallAndResult` (e.g. `lsp`) emitting a redundant tool-name line above the framed result.
- Collapsed the leading blank line for self-delimiting framed boxes.
- Added gallery fidelity routing `lsp`/`task` through the custom-tool branch via a `customRendered` fixture flag.
- Added gallery harness tests guarding state coverage and the custom-branch fallback label.
- Added lazy-loaded `gallery` command registration and new filters for tool, state, width, expanded, and plain output.
- Implemented gallery state rendering with terminal-width defaults, state filtering, and unknown-tool fallback handling.
- Added shared fixture types and aggregated renderer fixtures for multiple tool families in `galleryFixtures`.
- Added tests for renderer state coverage, route-specific output (streaming/progress/success/error), and fixture fallback.
can1357