feat: add test-cases media upload-url CLI command (API parity)

.gitignore

@@ -3,3 +3,4 @@
 .DS_Store
 *.log
 .claude/
+.worktrees/

src/client/mod.rs

@@ -494,6 +494,22 @@ impl TestCasesClient<'_> {
         let url = self.0.url(&format!("/v1/test-cases/{id}"));
         self.0.delete(url).await
     }
+
+    pub async fn media_upload_url(
+        &self,
+        test_case_id: &str,
+        filename: &str,
+        mime_type: &str,
+    ) -> Result<models::MediaUploadUrlResponse, ApiError> {
+        let url = self
+            .0
+            .url(&format!("/v1/test-cases/{test_case_id}/media:upload-url"));
+        let req = models::MediaUploadUrlRequest {
+            filename: filename.to_string(),
+            mime_type: mime_type.to_string(),
+        };
+        self.0.post(url, &req).await
+    }
 }
 
 impl PersonasClient<'_> {

src/client/models/test_case.rs

@@ -122,3 +122,17 @@ fn truncate(s: &str, max: usize) -> String {
         format!("{}...", end)
     }
 }
+
+#[derive(Debug, Serialize)]
+pub struct MediaUploadUrlRequest {
+    pub filename: String,
+    pub mime_type: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct MediaUploadUrlResponse {
+    pub upload_url: String,
+    pub s3_key: String,
+    pub s3_bucket: String,
+    pub url_expires_in_seconds: i64,
+}

src/commands/test_cases.rs

@@ -22,6 +22,8 @@ pub enum TestCaseCommands {
     Create(CreateArgs),
     Update(UpdateArgs),
     Delete(DeleteArgs),
+    #[command(name = "media-upload-url")]
+    MediaUploadUrl(MediaUploadUrlArgs),
 }
 
 impl TestCaseCommands {
@@ -33,6 +35,7 @@ impl TestCaseCommands {
             Self::Create(_) => "create",
             Self::Update(_) => "update",
             Self::Delete(_) => "delete",
+            Self::MediaUploadUrl(_) => "media-upload-url",
         }
     }
 }
@@ -125,6 +128,18 @@ pub struct DeleteArgs {
     test_case_id: String,
 }
 
+#[derive(Args)]
+pub struct MediaUploadUrlArgs {
+    /// Test case ID (8-char)
+    test_case_id: String,
+    /// Name of the file to upload
+    #[arg(long)]
+    filename: String,
+    /// MIME type of the file to upload
+    #[arg(long, default_value = "application/octet-stream")]
+    mime_type: String,
+}
+
 pub async fn execute(
     cmd: TestCaseCommands,
     client: &CovalClient,
@@ -285,6 +300,13 @@ pub async fn execute(
                 ],
             );
         }
+        TestCaseCommands::MediaUploadUrl(args) => {
+            let result = client
+                .test_cases()
+                .media_upload_url(&args.test_case_id, &args.filename, &args.mime_type)
+                .await?;
+            emit_one_with_actions(ctx, "test-cases", operation, &result, vec![]);
+        }
     }
     Ok(())
 }