test(web): refresh aria goldens for message IconActions and clocks

Settled history now exposes user/assistant chrome (including date-aware
clocks) in the accessibility tree; collapse clocks via scaffold and update
keyless scenario goldens.

apps/web/tests/snapshots/fresh-round-trip/ui.expected.md

@@ -5,7 +5,7 @@
     - tab "Chat" [selected]
     - tab "Trajectory"
     - tab "Waterfall"
-- text: "Use the bash tool to run exactly: echo WEB_E2E_OK. Then reply with the single word DONE and stop."
+- text: "Use the bash tool to run exactly: echo WEB_E2E_OK. Then reply with the single word DONE and stop. {{clock}}"
 - button "复制":
   - img
 - button "在新对话中分支":
@@ -16,6 +16,11 @@
   - img
   - img
   - text: Think The user wants me to run a simple bash command and reply with "DONE".
+- button "复制":
+  - img
+- button "在新对话中分支":
+  - img
+- text: {{clock}}
 - img
 - text: Bash Echo the test string
 - button "Think The command executed successfully and output \"WEB_E2E_OK\". I just need to reply with \"DONE\".":
@@ -23,7 +28,11 @@
   - img
   - text: Think The command executed successfully and output "WEB_E2E_OK". I just need to reply with "DONE".
 - paragraph: DONE
-- text: cache hit 99% · 15,818 tokens · 1 turns · 2 steps
+- button "复制":
+  - img
+- button "在新对话中分支":
+  - img
+- text: {{clock}} cache hit 99% · 15,818 tokens · 1 turns · 2 steps
 - textbox "Message the agent"
 - button "Add attachment":
   - img