test: align new chat guard static coverage

Update the older #1432 static regression to assert the extracted reusable-empty helper owns the message-count and in-flight checks, while both New Chat entry points call the helper. This keeps the test aligned with the shared guard introduced in PR #5206.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

tests/test_1432_newchat_and_1423_profile_input.py

@@ -14,6 +14,13 @@ def _read(filename):
     return open(os.path.join(STATIC_DIR, filename), encoding='utf-8').read()
 
 
+def _current_session_is_reusable_empty_chat_body(src):
+    start = src.find("function _currentSessionIsReusableEmptyChat()")
+    end = src.find("$('fileInput').onchange", start)
+    assert start >= 0 and end >= 0, "empty-session reuse helper not found in boot.js"
+    return src[start:end]
+
+
 class TestIssue1432NewChatGuardInFlight:
     """`+` button and Cmd/Ctrl+K must create a new chat even while the current
     session is still streaming. The empty-session guard from #1171 was checking
@@ -26,38 +33,48 @@ class TestIssue1432NewChatGuardInFlight:
 
     def test_btnNewChat_handler_checks_in_flight_state(self):
         src = _read('boot.js')
-        # Locate the btnNewChat onclick handler
+        helper = _current_session_is_reusable_empty_chat_body(src)
+
+        # The empty-session guard must check all three in-flight signals.
+        assert 'message_count' in helper, \
+            "shared New Chat guard missing message_count check"
+        assert 'S.busy' in helper, \
+            "shared New Chat guard missing S.busy check (#1432)"
+        assert 'active_stream_id' in helper, \
+            "shared New Chat guard missing active_stream_id check (#1432)"
+        assert 'pending_user_message' in helper, \
+            "shared New Chat guard missing pending_user_message check (#1432)"
+
+        # Locate the btnNewChat onclick handler and verify it uses the helper.
         m = re.search(
             r"\$\('btnNewChat'\)\.onclick=async\(\)=>\{(.*?)\};",
             src, re.DOTALL,
         )
         assert m, "btnNewChat onclick handler not found in boot.js"
         body = m.group(1)
-        # The empty-session guard must check all three in-flight signals
-        assert 'message_count' in body, \
-            "btnNewChat guard missing message_count check"
-        assert 'S.busy' in body, \
-            "btnNewChat guard missing S.busy check (#1432)"
-        assert 'active_stream_id' in body, \
-            "btnNewChat guard missing active_stream_id check (#1432)"
-        assert 'pending_user_message' in body, \
-            "btnNewChat guard missing pending_user_message check (#1432)"
+        assert '_currentSessionIsReusableEmptyChat()' in body, \
+            "btnNewChat handler must use the shared empty-session guard"
 
     def test_cmdK_handler_checks_in_flight_state(self):
         src = _read('boot.js')
+        helper = _current_session_is_reusable_empty_chat_body(src)
+
+        assert 'message_count' in helper, \
+            "shared New Chat guard missing message_count check"
+        assert 'S.busy' in helper, \
+            "shared New Chat guard missing S.busy check (#1432)"
+        assert 'active_stream_id' in helper, \
+            "shared New Chat guard missing active_stream_id check (#1432)"
+        assert 'pending_user_message' in helper, \
+            "shared New Chat guard missing pending_user_message check (#1432)"
+
         # Locate the Cmd/Ctrl+K branch — it sits inside a keydown listener
         idx = src.find("(e.metaKey||e.ctrlKey)&&e.key==='k'")
         assert idx >= 0, "Cmd/Ctrl+K handler not found in boot.js"
         # Read the next ~1500 chars (handler body)
         body = src[idx:idx + 1500]
-        assert 'message_count' in body, \
-            "Cmd/Ctrl+K guard missing message_count check"
-        assert 'S.busy' in body, \
-            "Cmd/Ctrl+K guard missing S.busy check (#1432)"
-        assert 'active_stream_id' in body, \
-            "Cmd/Ctrl+K guard missing active_stream_id check (#1432)"
-        assert 'pending_user_message' in body, \
-            "Cmd/Ctrl+K guard missing pending_user_message check (#1432)"
+        assert '_currentSessionIsReusableEmptyChat()' in body, \
+            "Cmd/Ctrl+K handler must use the shared empty-session guard"
 
     def test_in_flight_signal_matches_restoreSettledSession(self):
         """The new in-flight check uses the same signal as the canonical