feat(app): remember window size/position across restarts (window-state plugin)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/src-tauri/Cargo.lock

@@ -3228,6 +3228,7 @@ dependencies = [
  "tauri",
  "tauri-build",
  "tauri-plugin-notification",
+ "tauri-plugin-window-state",
  "tokio",
 ]
 
@@ -3549,6 +3550,21 @@ dependencies = [
  "url",
 ]
 
+[[package]]
+name = "tauri-plugin-window-state"
+version = "2.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73736611e14142408d15353e21e3cca2f12a3cfb523ad0ce85999b6d2ef1a704"
+dependencies = [
+ "bitflags 2.13.0",
+ "log",
+ "serde",
+ "serde_json",
+ "tauri",
+ "tauri-plugin",
+ "thiserror 2.0.18",
+]
+
 [[package]]
 name = "tauri-runtime"
 version = "2.11.2"

app/src-tauri/Cargo.toml

@@ -15,6 +15,7 @@ tauri-build = { version = "2", features = [] }
 [dependencies]
 tauri = { version = "2", features = [] }
 tauri-plugin-notification = "2"
+tauri-plugin-window-state = "2"
 spacesh-proto = { path = "../../crates/spacesh-proto" }
 tokio = { version = "1", features = ["full"] }
 serde = { version = "1", features = ["derive"] }

app/src-tauri/capabilities/default.json

@@ -11,6 +11,7 @@
     "core:resources:default",
     "core:menu:default",
     "core:tray:default",
-    "notification:default"
+    "notification:default",
+    "window-state:default"
   ]
 }

app/src-tauri/src/lib.rs

@@ -5,6 +5,8 @@ use tauri::Manager;
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run() {
     tauri::Builder::default()
+        // Persist + restore the window's size, position and maximized state across restarts.
+        .plugin(tauri_plugin_window_state::Builder::default().build())
         .plugin(tauri_plugin_notification::init())
         .setup(|app| {
             let handle = app.handle().clone();