Apps tab — AppListItem and AppDetailPanel groups

[cliffhall]

Context

Build the two presentational group components that the new AppsScreen will compose. See Apps Screen feature spec and the storybook component plan entries 2.3a and 2.5a.

Legacy v1 reference: AppsTab.tsx — see the list rendering (renderItem callback) and the input form panel block ("App Input" container with the "Open App" button).

Mirror the patterns used by ToolListItem (clients/web/src/components/groups/ToolListItem/ToolListItem.tsx) and ToolDetailPanel (clients/web/src/components/groups/ToolDetailPanel/ToolDetailPanel.tsx).

Scope

AppListItem

• Path: clients/web/src/components/groups/AppListItem/
• Props: tool: Tool, selected: boolean, onClick: () => void.
• Renders tool.icons (real MCP Tool.icons) when present (size sm), name, two-line description, and a trailing IconChevronRight affordance.
• Reuses the same active-state highlight as ToolListItem.

AppDetailPanel

• Path: clients/web/src/components/groups/AppDetailPanel/
• Props: tool: Tool, formValues, isOpening: boolean, onFormChange, onOpenApp.
• Layout: icon + title (tool.title ?? tool.name), description, SchemaForm for tool.inputSchema, full-width Button "Open App" with IconPlayerPlay.
• No annotations group, no progress display, no cancel — execution is delegated to the embedded app.
• Disabled state while isOpening or while the form has validation errors.

Stories

• AppListItem: Default, Selected, WithIcon, NoDescription, LongName.
• AppDetailPanel: NoFields, SimpleStringParam, MultipleParams, WithIcon, Opening, ComplexSchema.

Acceptance criteria

• Components are presentation-only (props + callbacks; no store access).
• Use only real MCP types (Tool) from @modelcontextprotocol/sdk/types.js — no v1.5 wrapper types.
• Mantine theme variants where reusable; no inline styles, no raw hex colors.
• Storybook stories cover each meaningful state.
• Tests pass and coverage is ≥ 90%.

Dependencies

• Blocked by: Apps tab — add @modelcontextprotocol/ext-apps dep and isAppTool helper in core (for the Tool.icons typing path; can run in parallel if SDK types already include icons).
• Can run in parallel with: AppRenderer issue.

Branch / Base

• Base: v2/main
• Label: v2