Add panel-wide styles and the Morph hub (#26)

Panel appearance now applies to the whole panel, with seven styles: Floating, Capsules, Notch, Edge to edge, Fused islands, Adaptive and Morph.

- Share composition, geometry, and motion through the renderer-independent `ferese-panel` crate, including native materials, input regions, and Settings previews.
- Add the Morph hub with media, calendar, notifications, controls, workspace previews, hover feedback, and attached mode. Keep recording and low-battery status visible and respect window clearance.
- Cache workspace preview geometry, draw thumbnails directly, centralize Morph transitions, and keep rendering settings local to each shell instance.
- Put Record Screen in the Morph header and show the display control only when an external monitor is connected. Update panel documentation, the desktop screenshot, and native check style names.

Local validation included 660 compositor tests, 191 shell tests, isolated preview-cache checks, GPU Morph captures at 1×/1.25×/1.5×, formatting, and Clippy with warnings denied. The final header change passed all 23 Morph tests. Release workflow jobs are skipped for this PR.

protocols/ferese-shell-v1.xml

@@ -22,7 +22,7 @@
     DEALINGS IN THE SOFTWARE.
   </copyright>
 
-  <interface name="ferese_shell_manager_v1" version="6">
+  <interface name="ferese_shell_manager_v1" version="8">
     <description summary="create a capability-scoped Ferese shell controller">
       This private global is visible only to clients granted the shell-control
       capability. It does not assign a Wayland surface role.
@@ -35,7 +35,7 @@
     <request name="destroy" type="destructor"/>
   </interface>
 
-  <interface name="ferese_shell_v1" version="6">
+  <interface name="ferese_shell_v1" version="8">
     <description summary="managed-window metadata and shell control">
       Window, workspace, and output identifiers are unsigned 64-bit values
       encoded as high and low 32-bit words. Each snapshot atomically replaces
@@ -72,6 +72,7 @@
       <entry name="urgent" value="2"/>
       <entry name="fullscreen" value="4"/>
       <entry name="floating" value="8"/>
+      <entry name="maximized" value="16" since="7"/>
     </enum>
 
     <enum name="failed_request">
@@ -79,6 +80,7 @@
       <entry name="close_window" value="1"/>
       <entry name="select_overview_window" value="2"/>
       <entry name="activate_workspace" value="3"/>
+      <entry name="move_window_to_workspace" value="4" since="8"/>
     </enum>
 
     <event name="snapshot_begin">
@@ -181,5 +183,27 @@
         disabled monitors and mirror targets without a logical wl_output.
       </description>
     </event>
+    <event name="window_geometry" since="8">
+      <description summary="window layout rectangle for workspace previews">
+        Follows its window event inside a snapshot. Coordinates are compositor
+        logical coordinates at the layout target, independent of animations.
+        Width and height are positive. An omitted event means unavailable geometry.
+      </description>
+      <arg name="window_hi" type="uint"/>
+      <arg name="window_lo" type="uint"/>
+      <arg name="x" type="fixed"/>
+      <arg name="y" type="fixed"/>
+      <arg name="width" type="fixed"/>
+      <arg name="height" type="fixed"/>
+    </event>
+    <request name="move_window_to_workspace" since="8">
+      <description summary="move an identified window without switching workspaces">
+        Both IDs must exist and belong to the same output. A stale ID is rejected.
+      </description>
+      <arg name="window_hi" type="uint"/>
+      <arg name="window_lo" type="uint"/>
+      <arg name="workspace_hi" type="uint"/>
+      <arg name="workspace_lo" type="uint"/>
+    </request>
   </interface>
 </protocol>