feat(fs): delegate win --server file reading to CM (#13736)

- Route Windows server-to-client file reads through CM instead of the connection layer
- Add FS IPC commands (ReadFile, CancelRead, SendConfirmForRead, ReadAllFiles) and CM data messages
  (ReadJobInitResult, FileBlockFromCM, FileReadDone, FileReadError, FileDigestFromCM, AllFilesResult)
- Track pending read validations and read jobs to coordinate CM-driven file transfers and clean them up
  on completion, cancellation, and errors
- Enforce a configurable file-transfer-max-files limit for ReadAllFiles and add stronger file name/path
  validation on the CM side
- Improve Flutter file transfer UX and robustness:
  - Use explicit percent/percentText progress fields
  - Derive speed and cancel actions from the active job
  - Handle job errors via FileModel.handleJobError and complete pending recursive tasks on failure
  - Wrap recursive directory operations in try/catch and await sendRemoveEmptyDir when removing empty directories

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

src/server/input_service.rs

@@ -17,13 +17,12 @@ use rdev::{self, EventType, Key as RdevKey, KeyCode, RawKey};
 use rdev::{CGEventSourceStateID, CGEventTapLocation, VirtualInput};
 #[cfg(target_os = "linux")]
 use scrap::wayland::pipewire::RDP_SESSION_INFO;
+#[cfg(target_os = "linux")]
+use std::sync::mpsc;
 use std::{
     convert::TryFrom,
     ops::{Deref, DerefMut},
-    sync::{
-        atomic::{AtomicBool, Ordering},
-        mpsc,
-    },
+    sync::atomic::{AtomicBool, Ordering},
     thread,
     time::{self, Duration, Instant},
 };