Prevent duplicate desktop model sessions and record calibration evidence

apps/desktop/src-tauri/Cargo.lock

@@ -3814,11 +3814,13 @@ dependencies = [
  "searchi-service",
  "serde",
  "serde_json",
+ "sha2 0.10.9",
  "tauri",
  "tauri-build",
  "tauri-plugin-dialog",
  "tauri-plugin-global-shortcut",
  "tauri-plugin-opener",
+ "tauri-plugin-single-instance",
  "tempfile",
  "uuid",
  "window-vibrancy",
@@ -4586,6 +4588,22 @@ dependencies = [
  "zbus",
 ]
 
+[[package]]
+name = "tauri-plugin-single-instance"
+version = "2.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c142ed88deee222bd2d979269d35c73b6c1c0f6ebd5b79b4ff80066fcad6af1"
+dependencies = [
+ "serde",
+ "serde_json",
+ "tauri",
+ "thiserror 2.0.21",
+ "tokio",
+ "tracing",
+ "windows-sys 0.61.2",
+ "zbus",
+]
+
 [[package]]
 name = "tauri-runtime"
 version = "2.12.1"

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"

apps/desktop/src-tauri/src/instance.rs

@@ -0,0 +1,78 @@
+//! Official single-instance transport, scoped to an explicitly selected profile.
+use sha2::{Digest, Sha256};
+use std::{ffi::OsString, io, path::PathBuf};
+use tauri::{Emitter, Manager};
+
+pub fn profile_identifier(base: &str, profile: Option<OsString>) -> io::Result<String> {
+    let Some(profile) = profile else {
+        return Ok(base.to_owned());
+    };
+    let path = crate::data_directory::resolve(PathBuf::new(), Some(profile))?;
+    // Resolve the existing ancestor without creating a first-use profile.
+    let canonical = crate::data_directory::canonical_exclusion(&path)?;
+    let mut digest = Sha256::new();
+    #[cfg(windows)]
+    {
+        use std::os::windows::ffi::OsStrExt;
+        for unit in canonical.as_os_str().encode_wide() {
+            digest.update(unit.to_le_bytes());
+        }
+    }
+    #[cfg(not(windows))]
+    {
+        use std::os::unix::ffi::OsStrExt;
+        digest.update(canonical.as_os_str().as_bytes());
+    }
+    Ok(format!("{base}.profile{:x}", digest.finalize()))
+}
+
+pub fn focus_search(app: &tauri::AppHandle) {
+    if let Some(window) = app.get_webview_window("main") {
+        let result = window
+            .show()
+            .and_then(|_| window.unminimize())
+            .and_then(|_| window.set_focus());
+        if let Err(error) = result {
+            eprintln!("Could not focus searchi: {error}");
+        }
+        let _ = window.emit("focus-search", ());
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    #[test]
+    fn default_identity_is_unchanged_and_invalid_profile_rejected() {
+        assert_eq!(
+            profile_identifier("dev.searchi.desktop", None).unwrap(),
+            "dev.searchi.desktop"
+        );
+        assert!(profile_identifier("dev.searchi.desktop", Some("relative".into())).is_err());
+    }
+    #[test]
+    fn canonical_profiles_are_stable_distinct_and_do_not_expose_paths() {
+        let root = tempfile::tempdir().unwrap();
+        let first = root.path().join("Gemäß_日本_😀");
+        let second = root.path().join("other");
+        let id = profile_identifier("dev.searchi.desktop", Some(first.clone().into_os_string()))
+            .unwrap();
+        assert!(!first.exists());
+        std::fs::create_dir(&first).unwrap();
+        assert_eq!(
+            id,
+            profile_identifier(
+                "dev.searchi.desktop",
+                Some(first.join(".").into_os_string())
+            )
+            .unwrap()
+        );
+        assert_ne!(
+            id,
+            profile_identifier("dev.searchi.desktop", Some(second.into_os_string())).unwrap()
+        );
+        assert!(!id.contains("Gemäß"));
+        assert_eq!(id.len(), "dev.searchi.desktop.profile".len() + 64);
+        assert!(!root.path().join("other").exists());
+    }
+}

apps/desktop/src-tauri/src/main.rs

@@ -6,6 +6,7 @@ compile_error!("Release desktop builds require --features custom-protocol to emb
 mod ai_commands;
 mod appearance;
 mod data_directory;
+mod instance;
 mod model_download;
 mod semantic_commands;
 mod settings;
@@ -545,16 +546,22 @@ fn start_folder_watching(
 }
 
 fn main() {
+    let mut context = tauri::generate_context!();
+    context.config_mut().identifier = instance::profile_identifier(
+        &context.config().identifier,
+        std::env::var_os("SEARCHI_DATA_DIR"),
+    )
+    .expect("searchi profile identity could not be resolved");
     tauri::Builder::default()
+        // Detect duplicates before any model, database, watcher or other plugin starts.
+        .plugin(tauri_plugin_single_instance::init(|app, _args, _cwd| {
+            instance::focus_search(app);
+        }))
         .plugin(tauri_plugin_dialog::init())
         .plugin(tauri_plugin_opener::init())
         .plugin(tauri_plugin_global_shortcut::Builder::new().with_handler(|app, _, event| {
             if event.state == ShortcutState::Pressed {
-                if let Some(window) = app.get_webview_window("main") {
-                    let result = window.show().and_then(|_| window.unminimize()).and_then(|_| window.set_focus());
-                    if let Err(error) = result { eprintln!("Could not focus Searchi: {error}"); }
-                    let _ = window.emit("focus-search", ());
-                }
+                instance::focus_search(app);
             }
         }).build())
         .setup(|app| {
@@ -687,7 +694,7 @@ fn main() {
             hybrid_search,
             hybrid_search_measured
         ])
-        .build(tauri::generate_context!())
+        .build(context)
         .expect("Searchi desktop could not start")
         .run(|app, event| {
             if matches!(event, tauri::RunEvent::Exit) {