fix(automation): reject invalid transform coefficients

Reject malformed matrices instead of dropping non-numeric coefficients and applying an unintended transform. The regression failed against the previous parser on GGEO-AI02; all 1721 scoped tests pass with the fix.

Co-Authored-By: Codex GPT-6.1 <noreply@openai.com>

crates/automation/src/dispatch.rs

@@ -425,8 +425,11 @@ impl Automation {
                             ImageEdit::Move([u0[0].min(u1[0]) as f64, u0[1].min(u1[1]) as f64, u0[0].max(u1[0]) as f64, u0[1].max(u1[1]) as f64])
                         }
                         "transform" => {
-                            let m: Vec<f64> =
-                                a.get("matrix").and_then(Value::as_array).map(|x| x.iter().filter_map(Value::as_f64).collect()).unwrap_or_default();
+                            let m: Vec<f64> = a
+                                .get("matrix")
+                                .and_then(Value::as_array)
+                                .and_then(|x| x.iter().map(Value::as_f64).collect())
+                                .ok_or_else(|| ToolError::InvalidArgs("transform needs matrix: 6 numbers [a, b, c, d, e, f]".into()))?;
                             let m = <[f64; 6]>::try_from(m)
                                 .map_err(|_| ToolError::InvalidArgs("transform needs matrix: 6 numbers [a, b, c, d, e, f]".into()))?;
                             ImageEdit::Transform(view_transform_to_user(&self.doc(&a)?.info.pages[page], m)?)

crates/automation/tests/it/automation.rs

@@ -3538,7 +3538,14 @@ fn transforming_page_images_through_tools() {
 
     // Flat, non-finite, short and missing matrices are refused before anything changes.
     let before = rect(&mut a);
-    for bad in [json!([1, 2, 2, 4, 0, 0]), json!([0, 0, 0, 0, 0, 0]), json!([1e300, 0, 0, 1e300, 0, 0]), json!([1, 0, 0, 1])] {
+    for bad in [
+        json!([1, 2, 2, 4, 0, 0]),
+        json!([0, 0, 0, 0, 0, 0]),
+        json!([1e300, 0, 0, 1e300, 0, 0]),
+        json!([1, 0, 0, 1]),
+        json!([1, 0, "invalid", 0, 1, 10, 0]),
+        json!([1, 0, null, 0, 1, 10, 0]),
+    ] {
         let r = a.call("image_edit", &json!({ "doc": made, "page": 1, "image": 1, "action": "transform", "matrix": bad }));
         assert!(matches!(r, Err(ToolError::InvalidArgs(_))), "{bad}: {r:?}");
     }