fix(macos): resolve build warnings, memory leaks, and thread safety

- Remove deprecated `cocoa` crate in favor of direct `objc` usage to fix future-incompatibilities warning from `block` dependency.
- Fix irrefutable `if let` pattern warning in macOS `SleepPreventer::Drop`.
- Fix memory leaks by properly releasing `alloc`-ed `NSString` and `NSAppleScript` objects.
- Fix AppKit thread safety by routing dock badge updates to the main thread via `run_on_main_thread`.

src-tauri/Cargo.lock

@@ -362,12 +362,6 @@ dependencies = [
  "wyz",
 ]
 
-[[package]]
-name = "block"
-version = "0.1.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0d8c1fef690941d3e7788d328517591fecc684c084084702d6ff1641e993699a"
-
 [[package]]
 name = "block-buffer"
 version = "0.10.4"
@@ -650,36 +644,6 @@ dependencies = [
  "windows-link 0.2.1",
 ]
 
-[[package]]
-name = "cocoa"
-version = "0.25.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f6140449f97a6e97f9511815c5632d84c8aacf8ac271ad77c559218161a1373c"
-dependencies = [
- "bitflags 1.3.2",
- "block",
- "cocoa-foundation",
- "core-foundation 0.9.4",
- "core-graphics 0.23.2",
- "foreign-types 0.5.0",
- "libc",
- "objc",
-]
-
-[[package]]
-name = "cocoa-foundation"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8c6234cbb2e4c785b456c0644748b1ac416dd045799740356f8363dfe00c93f7"
-dependencies = [
- "bitflags 1.3.2",
- "block",
- "core-foundation 0.9.4",
- "core-graphics-types 0.1.3",
- "libc",
- "objc",
-]
-
 [[package]]
 name = "combine"
 version = "4.6.7"
@@ -755,19 +719,6 @@ version = "0.8.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "773648b94d0e5d620f64f280777445740e61fe701025087ec8b57f45c791888b"
 
-[[package]]
-name = "core-graphics"
-version = "0.23.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c07782be35f9e1140080c6b96f0d44b739e2278479f64e02fdab4e32dfd8b081"
-dependencies = [
- "bitflags 1.3.2",
- "core-foundation 0.9.4",
- "core-graphics-types 0.1.3",
- "foreign-types 0.5.0",
- "libc",
-]
-
 [[package]]
 name = "core-graphics"
 version = "0.25.0"
@@ -776,22 +727,11 @@ checksum = "064badf302c3194842cf2c5d61f56cc88e54a759313879cdf03abdd27d0c3b97"
 dependencies = [
  "bitflags 2.13.0",
  "core-foundation 0.10.1",
- "core-graphics-types 0.2.0",
+ "core-graphics-types",
  "foreign-types 0.5.0",
  "libc",
 ]
 
-[[package]]
-name = "core-graphics-types"
-version = "0.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "45390e6114f68f718cc7a830514a96f903cccd70d02a8f6d9f643ac4ba45afaf"
-dependencies = [
- "bitflags 1.3.2",
- "core-foundation 0.9.4",
- "libc",
-]
-
 [[package]]
 name = "core-graphics-types"
 version = "0.2.0"
@@ -1375,7 +1315,6 @@ dependencies = [
  "async-trait",
  "axum",
  "chrono",
- "cocoa",
  "futures-util",
  "hmac",
  "keepawake",
@@ -4711,7 +4650,7 @@ dependencies = [
  "bitflags 2.13.0",
  "block2",
  "core-foundation 0.10.1",
- "core-graphics 0.25.0",
+ "core-graphics",
  "crossbeam-channel",
  "dbus",
  "dispatch2",