Desktop: Limit application to a single instance (#3441)

* only allow single instance

* more reliable CEF cache cleanup

* some cleanup

* fix lock file location

* add simple signal handling

* fix skew handles on desktop

* mac remove unused helpers

Cargo.lock

@@ -765,7 +765,7 @@ dependencies = [
  "thiserror 2.0.16",
  "tracing",
  "wgpu",
- "windows",
+ "windows 0.58.0",
  "windows-sys 0.61.2",
 ]
 
@@ -1242,6 +1242,17 @@ dependencies = [
  "syn 2.0.106",
 ]
 
+[[package]]
+name = "ctrlc"
+version = "3.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73736a89c4aff73035ba2ed2e565061954da00d4970fc9ac25dcc85a2a20d790"
+dependencies = [
+ "dispatch2",
+ "nix",
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "cursor-icon"
 version = "1.2.0"
@@ -1764,7 +1775,7 @@ dependencies = [
  "read-fonts 0.35.0",
  "roxmltree",
  "smallvec",
- "windows",
+ "windows 0.58.0",
  "windows-core 0.58.0",
  "yeslogic-fontconfig-sys",
 ]
@@ -2082,7 +2093,7 @@ dependencies = [
  "log",
  "presser",
  "thiserror 1.0.69",
- "windows",
+ "windows 0.58.0",
 ]
 
 [[package]]
@@ -2262,6 +2273,7 @@ dependencies = [
  "cef",
  "cef-dll-sys",
  "clap",
+ "ctrlc",
  "derivative",
  "dirs",
  "futures",
@@ -2273,6 +2285,7 @@ dependencies = [
  "objc2-app-kit",
  "objc2-foundation",
  "open",
+ "pidlock",
  "rand 0.9.2",
  "rfd",
  "ron",
@@ -2282,7 +2295,7 @@ dependencies = [
  "tracing-subscriber",
  "vello",
  "wgpu",
- "windows",
+ "windows 0.58.0",
  "winit",
 ]
 
@@ -4198,6 +4211,17 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5be167a7af36ee22fe3115051bc51f6e6c7054c9348e28deb4f49bd6f705a315"
 
+[[package]]
+name = "pidlock"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f837924d5368f9f35a1c404699de3c074311358035c77d7164f5948c08b31382"
+dependencies = [
+ "nix",
+ "thiserror 1.0.69",
+ "windows 0.62.2",
+]
+
 [[package]]
 name = "pin-project"
 version = "1.1.10"
@@ -7029,7 +7053,7 @@ dependencies = [
  "wasm-bindgen",
  "web-sys",
  "wgpu-types",
- "windows",
+ "windows 0.58.0",
  "windows-core 0.58.0",
 ]
 
@@ -7088,6 +7112,27 @@ dependencies = [
  "windows-targets 0.52.6",
 ]
 
+[[package]]
+name = "windows"
+version = "0.62.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "527fadee13e0c05939a6a05d5bd6eec6cd2e3dbd648b9f8e447c6518133d8580"
+dependencies = [
+ "windows-collections",
+ "windows-core 0.62.2",
+ "windows-future",
+ "windows-numerics",
+]
+
+[[package]]
+name = "windows-collections"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "23b2d95af1a8a14a3c7367e1ed4fc9c20e0a26e79551b1454d72583c97cc6610"
+dependencies = [
+ "windows-core 0.62.2",
+]
+
 [[package]]
 name = "windows-core"
 version = "0.58.0"
@@ -7107,13 +7152,37 @@ version = "0.61.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c0fdd3ddb90610c7638aa2b3a3ab2904fb9e5cdbecc643ddb3647212781c4ae3"
 dependencies = [
- "windows-implement 0.60.0",
- "windows-interface 0.59.1",
+ "windows-implement 0.60.2",
+ "windows-interface 0.59.3",
  "windows-link 0.1.3",
  "windows-result 0.3.4",
  "windows-strings 0.4.2",
 ]
 
+[[package]]
+name = "windows-core"
+version = "0.62.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8e83a14d34d0623b51dce9581199302a221863196a1dde71a7663a4c2be9deb"
+dependencies = [
+ "windows-implement 0.60.2",
+ "windows-interface 0.59.3",
+ "windows-link 0.2.1",
+ "windows-result 0.4.1",
+ "windows-strings 0.5.1",
+]
+
+[[package]]
+name = "windows-future"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e1d6f90251fe18a279739e78025bd6ddc52a7e22f921070ccdc67dde84c605cb"
+dependencies = [
+ "windows-core 0.62.2",
+ "windows-link 0.2.1",
+ "windows-threading",
+]
+
 [[package]]
 name = "windows-implement"
 version = "0.58.0"
@@ -7127,9 +7196,9 @@ dependencies = [
 
 [[package]]
 name = "windows-implement"
-version = "0.60.0"
+version = "0.60.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a47fddd13af08290e67f4acabf4b459f647552718f683a7b415d290ac744a836"
+checksum = "053e2e040ab57b9dc951b72c264860db7eb3b0200ba345b4e4c3b14f67855ddf"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -7149,9 +7218,9 @@ dependencies = [
 
 [[package]]
 name = "windows-interface"
-version = "0.59.1"
+version = "0.59.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bd9211b69f8dcdfa817bfd14bf1c97c9188afa36f4750130fcdf3f400eca9fa8"
+checksum = "3f316c4a2570ba26bbec722032c4099d8c8bc095efccdc15688708623367e358"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -7170,6 +7239,16 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f0805222e57f7521d6a62e36fa9163bc891acd422f971defe97d64e70d0a4fe5"
 
+[[package]]
+name = "windows-numerics"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e2e40844ac143cdb44aead537bbf727de9b044e107a0f1220392177d15b0f26"
+dependencies = [
+ "windows-core 0.62.2",
+ "windows-link 0.2.1",
+]
+
 [[package]]
 name = "windows-registry"
 version = "0.5.3"
@@ -7199,6 +7278,15 @@ dependencies = [
  "windows-link 0.1.3",
 ]
 
+[[package]]
+name = "windows-result"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7781fa89eaf60850ac3d2da7af8e5242a5ea78d1a11c49bf2910bb5a73853eb5"
+dependencies = [
+ "windows-link 0.2.1",
+]
+
 [[package]]
 name = "windows-strings"
 version = "0.1.0"
@@ -7218,6 +7306,15 @@ dependencies = [
  "windows-link 0.1.3",
 ]
 
+[[package]]
+name = "windows-strings"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7837d08f69c77cf6b07689544538e017c1bfcf57e34b4c0ff58e6c2cd3b37091"
+dependencies = [
+ "windows-link 0.2.1",
+]
+
 [[package]]
 name = "windows-sys"
 version = "0.45.0"
@@ -7311,6 +7408,15 @@ dependencies = [
  "windows_x86_64_msvc 0.53.0",
 ]
 
+[[package]]
+name = "windows-threading"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3949bd5b99cafdf1c7ca86b43ca564028dfe27d66958f2470940f73d86d75b37"
+dependencies = [
+ "windows-link 0.2.1",
+]
+
 [[package]]
 name = "windows_aarch64_gnullvm"
 version = "0.42.2"