Fixed an issue where AI Studio could be started multiple times (#803)

AGENTS.md

@@ -7,7 +7,7 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 MindWork AI Studio is a cross-platform desktop application for interacting with Large Language Models (LLMs). The app uses a hybrid architecture combining a Rust Tauri runtime (for the native desktop shell) with a .NET Blazor Server web application (for the UI and business logic).
 
 **Key Architecture Points:**
-- **Runtime:** Rust-based Tauri v1.8 application providing the native window, system integration, and IPC layer
+- **Runtime:** Rust-based Tauri v2 application providing the native window, system integration, and IPC layer
 - **App:** .NET 9 Blazor Server application providing the UI and core functionality
 - **Communication:** The Rust runtime and .NET app communicate via HTTPS with TLS certificates generated at startup
 - **Providers:** Multi-provider architecture supporting OpenAI, Anthropic, Google, Mistral, Perplexity, self-hosted models, and others
@@ -18,7 +18,7 @@ MindWork AI Studio is a cross-platform desktop application for interacting with
 ### Prerequisites
 - .NET 9 SDK
 - Rust toolchain (stable)
-- Tauri v1.6.2 CLI: `cargo install --version 1.6.2 tauri-cli`
+- Tauri v2 CLI
 - Tauri prerequisites (platform-specific dependencies)
 - **Note:** Development on Linux is discouraged due to complex Tauri dependencies that vary by distribution
 
@@ -151,7 +151,7 @@ Multi-level confidence scheme allows users to control which providers see which
 ## Dependencies and Frameworks
 
 **Rust:**
-- Tauri 1.8 - Desktop application framework
+- Tauri 2 - Desktop application framework
 - Axum - HTTPS API server
 - tokio - Async runtime
 - keyring - OS keyring integration

app/MindWork AI Studio/wwwroot/changelog/v26.6.1.md

@@ -14,4 +14,5 @@
 - Fixed an issue where renamed chat templates and profiles continued to show their old names in the chat toolbar until the app was restarted.
 - Fixed workspace creation and renaming to prevent new workspaces from using an existing name.
 - Fixed an issue on Microsoft Windows where reading attached documents could briefly open a terminal window while processing files.
+- Fixed an issue where AI Studio could be started multiple times on Microsoft Windows by launching it from different virtual desktops.
 - Upgraded dependencies.

runtime/Cargo.lock

@@ -214,7 +214,7 @@ dependencies = [
  "objc2-foundation 0.3.2",
  "parking_lot",
  "percent-encoding",
- "windows-sys 0.59.0",
+ "windows-sys 0.60.2",
  "x11rb",
 ]
 
@@ -1769,7 +1769,7 @@ dependencies = [
  "libc",
  "option-ext",
  "redox_users",
- "windows-sys 0.59.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -2066,7 +2066,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb"
 dependencies = [
  "libc",
- "windows-sys 0.59.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -3828,7 +3828,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fc2f4eb4bc735547cfed7c0a4922cbd04a4655978c09b54f1f7b228750664c34"
 dependencies = [
  "cfg-if",
- "windows-targets 0.48.5",
+ "windows-targets 0.52.6",
 ]
 
 [[package]]
@@ -4041,6 +4041,7 @@ dependencies = [
  "tauri-plugin-global-shortcut",
  "tauri-plugin-opener",
  "tauri-plugin-shell",
+ "tauri-plugin-single-instance",
  "tauri-plugin-updater",
  "tauri-plugin-window-state",
  "tempfile",
@@ -4350,7 +4351,7 @@ version = "0.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "680998035259dcfcafe653688bf2aa6d3e2dc05e98be6ab46afb089dc84f1df8"
 dependencies = [
- "proc-macro-crate 1.3.1",
+ "proc-macro-crate 3.5.0",
  "proc-macro2",
  "quote",
  "syn 2.0.117",
@@ -5393,7 +5394,7 @@ dependencies = [
  "once_cell",
  "socket2",
  "tracing",
- "windows-sys 0.59.0",
+ "windows-sys 0.60.2",
 ]
 
 [[package]]
@@ -5813,7 +5814,7 @@ dependencies = [
  "errno",
  "libc",
  "linux-raw-sys 0.12.1",
- "windows-sys 0.59.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -5872,7 +5873,7 @@ dependencies = [
  "security-framework",
  "security-framework-sys",
  "webpki-root-certs",
- "windows-sys 0.59.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -7005,6 +7006,21 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "tauri-plugin-single-instance"
+version = "2.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c8f29386f5e9fdc699182388a33ee80a56de436d91b67459e86afef426282af"
+dependencies = [
+ "serde",
+ "serde_json",
+ "tauri",
+ "thiserror 2.0.18",
+ "tracing",
+ "windows-sys 0.60.2",
+ "zbus",
+]
+
 [[package]]
 name = "tauri-plugin-updater"
 version = "2.10.1"
@@ -7163,7 +7179,7 @@ dependencies = [
  "getrandom 0.4.2",
  "once_cell",
  "rustix 1.1.4",
- "windows-sys 0.59.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]

runtime/Cargo.toml

@@ -14,6 +14,7 @@ tauri-plugin-window-state = { version = "2.4.1" }
 tauri-plugin-shell = "2.3.5"
 tauri-plugin-dialog = "2.7.1"
 tauri-plugin-opener = "2.5.4"
+tauri-plugin-single-instance = "2"
 serde = { version = "1.0.228", features = ["derive"] }
 serde_json = "1.0.150"
 keyring-core = "1.0.0"

runtime/src/app_window.rs

@@ -85,6 +85,26 @@ pub fn start_tauri() {
     });
 
     let app = tauri::Builder::default()
+        .plugin(tauri_plugin_single_instance::init(|app, args, cwd| {
+            info!(Source = "Tauri"; "Prevented second app instance from starting. cwd='{cwd}', args={args:?}");
+
+            let Some(window) = app.get_webview_window("main") else {
+                warn!(Source = "Tauri"; "Second app instance was blocked, but the main window was not available for activation.");
+                return;
+            };
+
+            if let Err(error) = window.show() {
+                warn!(Source = "Tauri"; "Failed to show main window after second app start: {error}");
+            }
+
+            if let Err(error) = window.unminimize() {
+                warn!(Source = "Tauri"; "Failed to unminimize main window after second app start: {error}");
+            }
+
+            if let Err(error) = window.set_focus() {
+                warn!(Source = "Tauri"; "Failed to focus main window after second app start: {error}");
+            }
+        }))
         .plugin(tauri_plugin_dialog::init())
         .plugin(tauri_plugin_shell::init())
         .plugin(tauri_plugin_opener::init())