The sidebar had only single-session deletion, which made stale or noisy
session lists expensive to maintain. This adds a batch-management lane in
the desktop UI and a server endpoint that deletes multiple sessions while
preserving per-session failure reporting and cleanup behavior.
Constraint: Session deletion must preserve existing transcript and adapter cleanup semantics
Constraint: Desktop UI should reuse the shared confirmation dialog instead of introducing a second modal surface
Rejected: Delete all selected sessions through repeated client DELETE calls | weaker partial-failure handling and duplicated cleanup orchestration
Rejected: Use a generic checkmark entry icon | it did not communicate batch deletion clearly enough
Confidence: high
Scope-risk: moderate
Directive: Keep batch deletion routed through the server batch endpoint so rollback and adapter cleanup stay centralized
Tested: bun test src/server/__tests__/sessions.test.ts -t batch-delete
Tested: bun run check:server
Tested: cd desktop && bun run check:desktop
Tested: browser UI smoke for group select, shift range select, delete confirmation, 7/30 day cleanup, Cmd+A filtered selection, and Escape exit
Not-tested: Live provider-backed session generation; this change covers session list management after sessions already exist
The desktop settings and sidebar still had deletion flows that either used browser-native confirms or deleted immediately. This change consolidates destructive confirmations behind a shared dialog component, applies it to provider deletion, plugin uninstall, adapter unbind, and sidebar session deletion, and adds regression coverage so delete actions require an explicit second confirmation before mutating state.
Constraint: Other in-progress desktop work in the tree had to stay out of this commit
Constraint: Existing MCP and task confirmations needed to keep their current behavior
Rejected: Leave confirmations embedded per-page with browser dialogs | inconsistent UX and easy to regress
Rejected: Add confirmations only to provider deletion | leaves other destructive desktop flows unsafe
Confidence: high
Scope-risk: narrow
Reversibility: clean
Directive: Any new desktop delete, uninstall, or unbind action should use the shared ConfirmDialog instead of browser-native dialogs or one-click deletion
Tested: bun run test src/components/layout/Sidebar.test.tsx src/__tests__/generalSettings.test.tsx; bun run lint
Not-tested: Manual desktop click-through of every destructive action after this refactor
