feat: Add relative mouse mode (#13928)

* feat: Add relative mouse mode

- Add "Relative Mouse Mode" toggle in desktop toolbar and bind to InputModel
- Implement relative mouse movement path: Flutter pointer deltas -> `type: move_relative` -> new `MOUSE_TYPE_MOVE_RELATIVE` in Rust
- In server input service, simulate relative movement via Enigo and keep latest cursor position in sync
- Track pointer-lock center in Flutter (local widget + screen coordinates) and re-center OS cursor after each relative move
- Update pointer-lock center on window move/resize/restore/maximize and when remote display geometry changes
- Hide local cursor when relative mouse mode is active (both Flutter cursor and OS cursor), restore on leave/disable
- On Windows, clip OS cursor to the window rect while in relative mode and release clip when leaving/turning off
- Implement platform helpers: `get_cursor_pos`, `set_cursor_pos`, `show_cursor`, `clip_cursor` (no-op clip/hide on Linux for now)
- Add keyboard shortcut Ctrl+Alt+Shift+M to toggle relative mode (enabled by default, works on all platforms)
- Remove `enable-relative-mouse-shortcut` config option - shortcut is now always available when keyboard permission is granted
- Handle window blur/focus/minimize events to properly release/restore cursor constraints
- Add MOUSE_TYPE_MASK constant and unit tests for mouse event constants

Note: Relative mouse mode state is NOT persisted to config (session-only).
Note: On Linux, show_cursor and clip_cursor are no-ops; cursor hiding is handled by Flutter side.

Signed-off-by: fufesou <linlong1266@gmail.com>

* feat(mouse): relative mouse mode, exit hint

Signed-off-by: fufesou <linlong1266@gmail.com>

* refact(relative mouse): shortcut

Signed-off-by: fufesou <linlong1266@gmail.com>

---------

Signed-off-by: fufesou <linlong1266@gmail.com>

.github/workflows/flutter-build.yml

@@ -39,7 +39,7 @@ env:
   # 2. Update the `VCPKG_COMMIT_ID` in `ci.yml` and `playground.yml`.
   VCPKG_COMMIT_ID: "120deac3062162151622ca4860575a33844ba10b"
   ARMV7_VCPKG_COMMIT_ID: "6f29f12e82a8293156836ad81cc9bf5af41fe836" # 2025.01.13, got "/opt/artifacts/vcpkg/vcpkg: No such file or directory" with latest version
-  VERSION: "1.4.4"
+  VERSION: "1.4.5"
   NDK_VERSION: "r27c"
   #signing keys env variable checks
   ANDROID_SIGNING_KEY: "${{ secrets.ANDROID_SIGNING_KEY }}"

.github/workflows/playground.yml

@@ -17,7 +17,7 @@ env:
   TAG_NAME: "nightly"
   VCPKG_BINARY_SOURCES: "clear;x-gha,readwrite"
   VCPKG_COMMIT_ID: "120deac3062162151622ca4860575a33844ba10b"
-  VERSION: "1.4.4"
+  VERSION: "1.4.5"
   NDK_VERSION: "r26d"
   #signing keys env variable checks
   ANDROID_SIGNING_KEY: "${{ secrets.ANDROID_SIGNING_KEY }}"

.github/workflows/winget.yml

@@ -10,6 +10,6 @@ jobs:
       - uses: vedantmgoyal9/winget-releaser@main
         with:
           identifier: RustDesk.RustDesk
-          version: "1.4.4"
-          release-tag: "1.4.4"
+          version: "1.4.5"
+          release-tag: "1.4.5"
           token: ${{ secrets.WINGET_TOKEN }}