WIP: 分屏动效与四分屏

[glyvut]

Summary by Sourcery

Add animated edge previews and support four-way corner tiling during window dragging.

New Features:

• Add four-corner edge tiling modes with configurable quadrant trigger zones.
• Animate edge-tile previews from the dragged window geometry to the target tile.

Enhancements:

• Extend edge-tile detection and preview updates to use the active seat and support corner targets.

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[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: glyvut

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• debian/deepin/OWNERS

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[sourcery-ai]

Reviewer's Guide

Implements animated edge-tiling preview that grows from the dragged window and adds four-corner (quadrant) tiling modes triggered by cursor position along the screen edges.

Sequence diagram for animated edge-tiling preview from dragged window

sequenceDiagram
    actor User
    participant WSeat
    participant SeatSurfaceManager
    participant RootSurfaceContainer
    participant QuickTile
    participant EdgeTilePreview

    User->>WSeat: drag window to screen edge
    WSeat->>SeatSurfaceManager: startEdgeTileDelay
    SeatSurfaceManager->>RootSurfaceContainer: detectEdgeTilingForSeat
    RootSurfaceContainer->>RootSurfaceContainer: outputAt(pos)
    RootSurfaceContainer->>QuickTile: geometry(mode, output)
    QuickTile-->>RootSurfaceContainer: QRectF geo
    RootSurfaceContainer->>RootSurfaceContainer: getSeatContainerOrDefault(seat)
    RootSurfaceContainer->>RootSurfaceContainer: moveResizeSurface
    RootSurfaceContainer-->>RootSurfaceContainer: QRectF sourceGeo
    RootSurfaceContainer->>EdgeTilePreview: setProperty(sourceGeometry, sourceGeo)
    RootSurfaceContainer->>EdgeTilePreview: setProperty(targetGeometry, geo)
    RootSurfaceContainer->>EdgeTilePreview: setVisible(true)
    EdgeTilePreview->>EdgeTilePreview: onVisibleChanged
    EdgeTilePreview->>EdgeTilePreview: applyGeometry(sourceGeometry)
    EdgeTilePreview->>EdgeTilePreview: applyGeometry(targetGeometry)
    EdgeTilePreview->>EdgeTilePreview: NumberAnimation on x,y,width,height

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File-Level Changes

Change	Details	Files
Add animation support to the edge tile preview so it transitions from the dragged surface geometry to the target tile area.	Introduce root id, sourceGeometry/targetGeometry properties, and animation control flags in EdgeTilePreview.qml Implement applyGeometry helper and visible/targetGeometry change handlers to drive geometry updates Add Behaviors with NumberAnimation on x, y, width, and height, gated by animationEnabled	src/core/qml/EdgeTilePreview.qml
Use the moved surface geometry as the starting point for the edge tile preview and propagate seat information to the preview update.	Change updateEdgeTilePreview signature to accept WSeat and default to nullptr Lookup the seat-specific container and its moveResizeSurface to fetch current window geometry Set sourceGeometry and targetGeometry properties on the preview instead of directly setting x/y/width/height Update all callers to pass the seat when triggering the edge tile preview	src/core/rootsurfacecontainer.cpp src/core/rootsurfacecontainer.h src/surface/seatsurfacemanager.cpp
Add quadrant (corner) tiling modes and geometry calculations for four-way tiling.	Extend QuickTile::Mode enum with TopLeft, TopRight, BottomLeft, BottomRight Implement geometry() handling for the new modes using half-width and half-height rectangles	src/surface/quicktile.h src/surface/quicktile.cpp
Detect corner tiling based on cursor position near screen edges using configurable quadrant zone ratio.	Read edgeQuadrantZoneRatio from configuration and derive vertical boundaries for quadrant zones Update edge-tiling detection on left/right edges to select corner modes when cursor is in top/bottom quadrant bands Ensure sampling logic for delay/preview respects the new corner modes Clarify that top edge only triggers maximize, with quadrant zones reserved for side edges	src/core/rootsurfacecontainer.cpp misc/dconfig/org.deepin.dde.treeland.user.json

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