Support keyboard window movement in Overview

[qeude]

Summary

• Add Up/Down keyboard actions to move selected windows between stacked positions and workspaces.
• Animate moved windows and preserve selection alignment during Overview updates.
• Improve workspace parking, focus handling, and fallback rendering when desktop capture is unavailable.
• Add coverage for Overview movement, projection interpolation, hotkeys, and daemon focus policy.

Testing

• Not run; automated and desktop verification should be completed before merge.

[greptile-apps]

Greptile Summary

The PR adds keyboard-driven vertical window movement in Overview, including movement within stacks and between workspaces. It also adds projection animation, capture-unavailable workspace parking, and native-focus handling intended to preserve Overview state during parking.

• Maps configured move-window Up/Down bindings to new Overview movement actions.
• Routes keyboard movement through the existing Overview drop/runtime mutation path.
• Animates moved-window projections and aligns viewport selection after updates.
• Parks managed windows when desktop capture is unavailable and restores them when Overview closes.
• Adds tests for movement, interpolation, hotkey mapping, preview fallback, scrolling, and focus policy.

Confidence Score: 5/5

The PR appears safe to merge based on the reviewed changes, with no concrete blocking or independently actionable non-blocking issue identified.

The keyboard targets conform to the existing runtime drop-index contract, asynchronous frame submissions reject superseded work, and the fallback parking, focus, and rendering paths remain internally consistent.

Important Files Changed

Filename	Overview
Sources/DefiMacOS/OverviewController.swift	Adds keyboard movement, moved-window projection animation, selection alignment, and capture-unavailable panel behavior; no actionable defect was established.
Sources/DefiCore/Overview.swift	Adds projection interpolation, foreground overlay handling, and expanded workspace projection bounds for animation continuity.
Sources/DefiDaemon/DaemonOverview.swift	Integrates Overview parking and restoration with daemon layout application.
Sources/DefiDaemon/DaemonDesktop.swift	Parks active-workspace windows while fallback Overview mode is active.
Sources/DefiDaemon/DaemonDesktopSynchronization.swift	Avoids closing a parked Overview for native focus changes lacking a newer explicit focus intent.
Sources/DefiMacOS/HotKeyModels.swift	Maps configured movement and focus commands to appropriate Overview keyboard actions.
Sources/DefiMacOS/HotKeys.swift	Passes the configured command into Overview key-action classification.

Sequence Diagram

sequenceDiagram
  participant K as HotKey Tap
  participant O as OverviewController
  participant D as Daemon
  participant R as DefiRuntime
  participant P as Overview Projection
  K->>O: moveUp / moveDown
  O->>O: Compute stack or workspace drop target
  O->>D: dropHandler(window, source, target)
  D->>R: applyOverviewDrop
  R-->>D: Updated runtime state
  D->>O: Updated Overview snapshot
  O->>P: Interpolate old and new projections
  P-->>O: Animated moved-window presentation

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