Add 10-minute timeout to test commands and disable e2e in merge pipeline

Test commands in run_project_tests now use wait-timeout to enforce a
600-second ceiling, preventing hung processes (e.g. Playwright with no
server) from blocking the merge pipeline indefinitely. Also disables
e2e tests in script/test until the merge workspace can run them safely.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/agents/gates.rs

@@ -1,5 +1,10 @@
 use std::path::Path;
 use std::process::Command;
+use std::time::Duration;
+use wait_timeout::ChildExt;
+
+/// Maximum time any single test command is allowed to run before being killed.
+const TEST_TIMEOUT: Duration = Duration::from_secs(600); // 10 minutes
 
 /// Detect whether the base branch in a worktree is `master` or `main`.
 /// Falls back to `"master"` if neither is found.
@@ -65,48 +70,20 @@ pub(crate) fn run_project_tests(path: &Path) -> Result<(bool, String), String> {
     let script_test = path.join("script").join("test");
     if script_test.exists() {
         let mut output = String::from("=== script/test ===\n");
-        let result = Command::new(&script_test)
-            .current_dir(path)
-            .output()
-            .map_err(|e| format!("Failed to run script/test: {e}"))?;
-        let out = format!(
-            "{}{}",
-            String::from_utf8_lossy(&result.stdout),
-            String::from_utf8_lossy(&result.stderr)
-        );
+        let (success, out) = run_command_with_timeout(&script_test, &[], path)?;
         output.push_str(&out);
         output.push('\n');
-        return Ok((result.status.success(), output));
+        return Ok((success, output));
     }
 
     // Fallback: cargo nextest run / cargo test
     let mut output = String::from("=== tests ===\n");
-    let (success, test_out) = match Command::new("cargo")
-        .args(["nextest", "run"])
-        .current_dir(path)
-        .output()
-    {
-        Ok(o) => {
-            let combined = format!(
-                "{}{}",
-                String::from_utf8_lossy(&o.stdout),
-                String::from_utf8_lossy(&o.stderr)
-            );
-            (o.status.success(), combined)
-        }
+    let (success, test_out) = match run_command_with_timeout("cargo", &["nextest", "run"], path) {
+        Ok(result) => result,
         Err(_) => {
             // nextest not available — fall back to cargo test
-            let o = Command::new("cargo")
-                .args(["test"])
-                .current_dir(path)
-                .output()
-                .map_err(|e| format!("Failed to run cargo test: {e}"))?;
-            let combined = format!(
-                "{}{}",
-                String::from_utf8_lossy(&o.stdout),
-                String::from_utf8_lossy(&o.stderr)
-            );
-            (o.status.success(), combined)
+            run_command_with_timeout("cargo", &["test"], path)
+                .map_err(|e| format!("Failed to run cargo test: {e}"))?
         }
     };
     output.push_str(&test_out);
@@ -114,6 +91,49 @@ pub(crate) fn run_project_tests(path: &Path) -> Result<(bool, String), String> {
     Ok((success, output))
 }
 
+/// Run a command with a timeout. Returns `(success, combined_output)`.
+/// Kills the child process if it exceeds `TEST_TIMEOUT`.
+fn run_command_with_timeout(
+    program: impl AsRef<std::ffi::OsStr>,
+    args: &[&str],
+    dir: &Path,
+) -> Result<(bool, String), String> {
+    let mut child = Command::new(program)
+        .args(args)
+        .current_dir(dir)
+        .stdout(std::process::Stdio::piped())
+        .stderr(std::process::Stdio::piped())
+        .spawn()
+        .map_err(|e| format!("Failed to spawn command: {e}"))?;
+
+    match child.wait_timeout(TEST_TIMEOUT) {
+        Ok(Some(status)) => {
+            // Process exited within the timeout — collect output.
+            let stdout = child.stdout.take().map(|mut r| {
+                let mut s = String::new();
+                std::io::Read::read_to_string(&mut r, &mut s).ok();
+                s
+            }).unwrap_or_default();
+            let stderr = child.stderr.take().map(|mut r| {
+                let mut s = String::new();
+                std::io::Read::read_to_string(&mut r, &mut s).ok();
+                s
+            }).unwrap_or_default();
+            Ok((status.success(), format!("{stdout}{stderr}")))
+        }
+        Ok(None) => {
+            // Timed out — kill the child.
+            let _ = child.kill();
+            let _ = child.wait();
+            Err(format!(
+                "Command timed out after {} seconds",
+                TEST_TIMEOUT.as_secs()
+            ))
+        }
+        Err(e) => Err(format!("Failed to wait for command: {e}")),
+    }
+}
+
 /// Run `cargo clippy` and the project test suite (via `script/test` if present,
 /// otherwise `cargo nextest run` / `cargo test`) in the given directory.
 /// Returns `(gates_passed, combined_output)`.