The RequestConflictResolution Func was declared on 5 VMs and hand-threaded shell->details->merge-section->diff->merge-modal. Replaced with a DI-singleton IMergeCoordinator (MergeCoordinator holder; shell wires its Handler at composition, breaking the shell<->island cycle). Invokers (MergeModal, DetailsIsland, WorktreesOverview) depend on the interface; the two pass-through VMs (DiffModal, MergeSection) drop the seam entirely. No behavior change; conflict-seam + batch tests rewired to assert via the coordinator.
Kontext: src/ClaudeDo.Ui/ViewModels/Islands/DetailsIslandViewModel.cs ist mit 1431 Zeilen ein God-VM mit ~12 Concerns (Log-Streaming, Titel/Description-Editing, Subtasks, Child-Outcomes, Merge-Preview/-Targets, Diff, Agent-Settings-Overrides, Notes-Mode, Prep-Mode, Tabs, Session-Outcome/Roadblocks, Worktree-Info). Jedes neue Feature landet dort.
Änderungen — drei klar abgrenzbare Sektionen als ei
ClaudeDo-Task: 483e419f-1ec8-46ba-986b-8b90d6596b49
