Prevent duplicate desktop model sessions and record calibration evidence

apps/desktop/src-tauri/Cargo.toml

@@ -22,6 +22,7 @@ tauri-plugin-opener = "2"
 tauri-plugin-global-shortcut = "2"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
+sha2 = "0.10"
 tempfile = "3"
 searchi-core = { path = "../../../crates/searchi-core" }
 searchi-service = { path = "../../../crates/searchi-service" }
@@ -30,6 +31,7 @@ searchi-media = { path = "../../../crates/searchi-media" }
 searchi-ai = { path = "../../../crates/searchi-ai" }
 uuid = { version = "1", features = ["v4"] }
 image = { version = "0.25", default-features = false, features = ["jpeg", "png", "webp", "bmp"] }
+tauri-plugin-single-instance = "2"
 
 [target.'cfg(windows)'.dependencies]
 window-vibrancy = "=0.8.1"