Prevent image editing without image input

## Motivation

Kimi produces its own tool id. It gets confused when we generate our own
id.

## Changes

Add id to tool call item and parse Kimi id properly.

## Test Plan

### Manual Testing
<img width="3198" height="522" alt="image"
src="https://github.com/user-attachments/assets/d71ec2be-7f57-49dc-a569-d304cc430f4d"
/>

Long running Kimi K2.5 cluster querying itself through OpenCode running
on the same Kimi K2.5 instance.

dashboard/src/lib/components/ChatForm.svelte

@@ -254,6 +254,7 @@
 
   function handleSubmit() {
     if ((!message.trim() && uploadedFiles.length === 0) || loading) return;
+    if (isEditOnlyWithoutImage) return;
 
     const content = message.trim();
     const files = [...uploadedFiles];
@@ -278,7 +279,11 @@
       if (imageFile.preview) {
         editImage(content, imageFile.preview);
       }
-    } else if (isImageModel() && content) {
+    } else if (
+      currentModel &&
+      modelSupportsTextToImage(currentModel) &&
+      content
+    ) {
       // Use image generation for text-to-image models
       generateImage(content);
     } else {

src/exo/worker/runner/runner.py

@@ -812,7 +812,7 @@ def patch_kimi_tokenizer(tokenizer: TokenizerWrapper):
     #   functions.multiply:0 <|tool_call_argument_begin|> {"a": 2, "b": 3}
     #   Also needs to handle tools like call_0<|tool_call_argument_begin|>{"filePath": "..."}
     _func_name_regex = re.compile(
-        r"^\s*(.+)[:_](\d+)\s*<\|tool_call_argument_begin\|>", re.DOTALL
+        r"^\s*(.+)[:](\d+)\s*<\|tool_call_argument_begin\|>", re.DOTALL
     )
     _func_arg_regex = re.compile(r"<\|tool_call_argument_begin\|>\s*(.*)\s*", re.DOTALL)
 
@@ -836,10 +836,10 @@ def patch_kimi_tokenizer(tokenizer: TokenizerWrapper):
         func_name_match = _func_name_regex.search(text)
         if func_name_match is None:
             raise ValueError(f"Could not parse function name from tool call: {text!r}")
-        func_name = func_name_match.group(1)
+        original_func_name = func_name_match.group(1)
         tool_id = func_name_match.group(2)
         # strip off the `functions.` prefix, if it exists.
-        func_name = func_name[func_name.find(".") + 1 :]
+        func_name = original_func_name[original_func_name.find(".") + 1 :]
 
         func_args_match = _func_arg_regex.search(text)
         if func_args_match is None:
@@ -848,7 +848,11 @@ def patch_kimi_tokenizer(tokenizer: TokenizerWrapper):
         # the args should be valid json - no need to check against our tools to deserialize
         arg_dct = _deserialize(func_args)  # pyright: ignore[reportAny]
 
-        return dict(id=tool_id, name=func_name, arguments=arg_dct)  # pyright: ignore[reportAny]
+        return dict(
+            id=f"{original_func_name}:{tool_id}",
+            name=func_name,
+            arguments=arg_dct,  # pyright: ignore[reportAny]
+        )
 
     tokenizer._tool_call_start = tool_call_start
     tokenizer._tool_call_end = tool_call_end