refactor: Check vision support against active model

Co-authored-by: cecli (openai/gemini_cli/gemini-2.5-pro)

Author: Your Name

cecli/commands/add.py

@@ -125,10 +125,11 @@ async def execute(cls, io, coder, args, **kwargs):
                 else:
                     io.tool_error(f"Cannot add {matched_file} as it's not part of the repository")
             else:
-                if is_image_file(matched_file) and not coder.main_model.info.get("supports_vision"):
+                active_model = coder.get_active_model()
+                if is_image_file(matched_file) and not active_model.info.get("supports_vision"):
                     io.tool_error(
                         f"Cannot add image file {matched_file} as the"
-                        f" {coder.main_model.name} does not support images."
+                        f" {active_model.name} does not support images."
                     )
                     continue
                 content = io.read_text(abs_file_path)

cecli/commands/read_only.py

@@ -156,10 +156,11 @@ def _add_read_only_file(
         source_mode="read-only",
         target_mode="read-only",
     ):
-        if is_image_file(original_name) and not coder.main_model.info.get("supports_vision"):
+        active_model = coder.get_active_model()
+        if is_image_file(original_name) and not active_model.info.get("supports_vision"):
             io.tool_error(
                 f"Cannot add image file {original_name} as the"
-                f" {coder.main_model.name} does not support images."
+                f" {active_model.name} does not support images."
             )
             return
 

cecli/commands/read_only_stub.py

@@ -156,10 +156,11 @@ def _add_read_only_file(
         source_mode="read-only",
         target_mode="read-only",
     ):
-        if is_image_file(original_name) and not coder.main_model.info.get("supports_vision"):
+        active_model = coder.get_active_model()
+        if is_image_file(original_name) and not active_model.info.get("supports_vision"):
             io.tool_error(
                 f"Cannot add image file {original_name} as the"
-                f" {coder.main_model.name} does not support images."
+                f" {active_model.name} does not support images."
             )
             return