working inputting characters

client/src/state/pages/auth.rs

@@ -12,6 +12,7 @@ pub struct AuthState {
     pub auth_token: Option<String>,
     pub user_id: Option<String>,
     pub role: Option<String>,
+    pub has_unsaved_changes: bool,
 }
 
 impl AuthState {
@@ -26,6 +27,7 @@ impl AuthState {
             auth_token: None,
             user_id: None,
             role: None,
+            has_unsaved_changes: false,
         }
     }
 }
@@ -36,12 +38,16 @@ impl CanvasState for AuthState {
     }
 
     fn current_cursor_pos(&self) -> usize {
-        self.current_cursor_pos
+        let len = match self.current_field {
+            0 => self.username.len(),
+            1 => self.password.len(),
+            _ => 0,
+        };
+        self.current_cursor_pos.min(len)
     }
 
     fn has_unsaved_changes(&self) -> bool {
-        // Auth form doesn't need unsaved changes tracking
-        false
+        self.has_unsaved_changes
     }
 
     fn inputs(&self) -> Vec<&String> {
@@ -52,7 +58,7 @@ impl CanvasState for AuthState {
         match self.current_field {
             0 => &self.username,
             1 => &self.password,
-            _ => "", // Return empty string for invalid index instead of panicking
+            _ => "",
         }
     }
 
@@ -68,20 +74,31 @@ impl CanvasState for AuthState {
         vec!["Username/Email", "Password"]
     }
 
-    // --- Implement the setter methods ---
     fn set_current_field(&mut self, index: usize) {
-        // AuthState only has 2 fields (0 and 1)
-        if index < 2 {
+        if index < 2 { // AuthState only has 2 fields
             self.current_field = index;
+            // IMPORTANT: Clamp cursor position to the length of the NEW field
+            let len = match self.current_field {
+               0 => self.username.len(),
+               1 => self.password.len(),
+               _ => 0,
+            };
+            self.current_cursor_pos = self.current_cursor_pos.min(len);
         }
     }
 
     fn set_current_cursor_pos(&mut self, pos: usize) {
-        // Optional: Add validation based on current input length if needed
-        self.current_cursor_pos = pos;
+        let len = match self.current_field {
+           0 => self.username.len(),
+           1 => self.password.len(),
+           _ => 0,
+        };
+        // Ensure stored position is always valid
+        self.current_cursor_pos = pos.min(len);
     }
 
-    fn set_has_unsaved_changes(&mut self, _changed: bool) {
-        // Auth form doesn't track unsaved changes, so do nothing
+    fn set_has_unsaved_changes(&mut self, changed: bool) {
+        // Allow the generic handler to signal changes
+        self.has_unsaved_changes = changed;
     }
 }