add Default implementation

src/profile.rs

@@ -24,6 +24,12 @@ pub struct Profile {
     pub config_path: PathBuf,
 }
 
+impl Default for Profile {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl Profile {
     // Constructors
 

src/profile/identity/gemini/auth/memory.rs

@@ -11,6 +11,12 @@ pub struct Memory {
     index: RefCell<HashMap<String, i64>>,
 }
 
+impl Default for Memory {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl Memory {
     // Constructors
 

src/profile/identity/gemini/memory.rs

@@ -8,6 +8,12 @@ pub struct Memory {
     index: RefCell<HashMap<i64, String>>,
 }
 
+impl Default for Memory {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl Memory {
     // Constructors