Add GLM 5.3 Flash support

src/server/tools.rs

@@ -365,6 +365,7 @@ pub(super) fn render_messages(
 
     let mut turns = Vec::<ChatTurn>::new();
     for message in messages {
+        validate_inline_images(&message.content)?;
         let content = content_text(&message.content);
         match message.role.as_str() {
             "system" | "developer" => {
@@ -426,6 +427,30 @@ pub(super) fn render_messages(
     Ok((system, turns))
 }
 
+fn validate_inline_images(value: &Value) -> Result<(), (u16, String)> {
+    let Some(parts) = value.as_array() else {
+        return Ok(());
+    };
+    for part in parts {
+        let Some(image) = part.get("image_url") else {
+            continue;
+        };
+        let url = image
+            .get("url")
+            .or(Some(image))
+            .and_then(Value::as_str)
+            .ok_or_else(|| (400, "invalid image input".into()))?;
+        if !url.starts_with("data:image/png;base64,") && !url.starts_with("data:image/jpeg;base64,")
+        {
+            return Err((
+                400,
+                "image input must be an inline PNG or JPEG data URI".into(),
+            ));
+        }
+    }
+    Ok(())
+}
+
 pub(super) fn validate_tool_results(
     state: &State,
     messages: &[ApiMessage],
@@ -779,8 +804,18 @@ pub(super) fn content_text(value: &Value) -> String {
         Value::Array(parts) => parts
             .iter()
             .filter_map(|part| match part {
-                Value::String(text) => Some(text.as_str()),
-                Value::Object(object) => object.get("text").and_then(Value::as_str),
+                Value::String(text) => Some(text.clone()),
+                Value::Object(object) => object
+                    .get("text")
+                    .and_then(Value::as_str)
+                    .map(str::to_owned)
+                    .or_else(|| {
+                        let url = object
+                            .get("image_url")
+                            .and_then(|value| value.get("url").or(Some(value)))
+                            .and_then(Value::as_str)?;
+                        Some(crate::engine::vision_data_marker(url))
+                    }),
                 _ => None,
             })
             .collect(),