feat: keep track of window size and position

src/config.rs

@@ -229,6 +229,8 @@ impl Default for EndpointConfig {
 pub struct InterfaceConfig {
     pub sidebar_collapsed: bool,
     pub sidebar_width: i32,
+    pub window_size: [u32; 2],
+    pub window_position: Option<[i32; 2]>,
     /// Project the app reopens on. Cleared when that project goes away.
     pub last_project_id: Option<i32>,
 }
@@ -238,6 +240,8 @@ impl Default for InterfaceConfig {
         Self {
             sidebar_collapsed: false,
             sidebar_width: 276,
+            window_size: [1120, 720],
+            window_position: None,
             last_project_id: None,
         }
     }
@@ -348,6 +352,11 @@ mod tests {
                 whitespace: GitDiffWhitespace::IgnoreEndOfLine,
                 ..GitConfig::default()
             },
+            interface: InterfaceConfig {
+                window_size: [1280, 800],
+                window_position: Some([120, -40]),
+                ..InterfaceConfig::default()
+            },
             ..Config::default()
         };
         config.save(&path).unwrap();
@@ -358,7 +367,8 @@ mod tests {
             "model: glm-5.2\ndefault_permission_mode: ai\na2ui_enabled: false\n\
              generation:\n  context_tokens: 65536\n  reasoning_mode: none\n\
              runtime:\n  ssd:\n    enabled: true\n    cache: 64GB\n\
-             git:\n  diff_layout: split\n  diff_algorithm: patience\n  context_lines: 5\n  whitespace: ignore-end-of-line\n"
+             git:\n  diff_layout: split\n  diff_algorithm: patience\n  context_lines: 5\n  whitespace: ignore-end-of-line\n\
+             interface:\n  window_size:\n  - 1280\n  - 800\n  window_position:\n  - 120\n  - -40\n"
         );
         assert_eq!(Config::load(&path).unwrap(), config);
         fs::remove_dir_all(&directory).unwrap();