test(web): re-record composer stats goldens over merged master

Reapplies this branch's one added occupancy segment on top of master's own
golden refresh from the preceding merge. Recorded with DSH_SNAPSHOT=refresh,
not hand-edited: an attempt to strip the co-recorded context-injection
affordance out of these files broke replay, which is the suite working as
intended — a golden must match the real render byte-for-byte.

Web replay is now 76/77. The one failure, queue-actions ("edits and removes
exact pending occurrences", counts 2 user/message events where it expects 1),
reproduces at pristine origin/master and is untouched here.

apps/web/tests/snapshots/live-interactions/cancel.expected.md

@@ -11,6 +11,7 @@
   - img
 - button "编辑":
   - img
+- button "▸ 上下文注入"
 - paragraph: partial
 - text: 已停止
 - button "复制":
@@ -26,4 +27,4 @@
   - text: DeepSeek-V4-Flash
   - img
 - button "Send message" [disabled]
-- text: 1 turns · 1 steps Input 0 tok · Output 0 tok
+- text: 1 turns · 1 steps Context 0% of 128K Input 0 tok · Output 0 tok

apps/web/tests/snapshots/live-interactions/error-auth.expected.md

@@ -11,6 +11,7 @@
   - img
 - button "编辑":
   - img
+- button "▸ 上下文注入"
 - textbox "Message the agent"
 - button "Add attachment":
   - img

apps/web/tests/snapshots/live-interactions/retry.expected.md

@@ -11,6 +11,7 @@
   - img
 - button "编辑":
   - img
+- button "▸ 上下文注入"
 - button "Think The user is asking for a one-sentence description of event sourcing. This is a straightforward knowledge question that doesn't require any skill loading or tool calls.":
   - img
   - img
@@ -29,4 +30,4 @@
   - text: DeepSeek-V4-Flash
   - img
 - button "Send message" [disabled]
-- text: 1 turns · 1 steps Cache hit 99% Input 7.8K tok · Output 79 tok
+- text: 1 turns · 1 steps Context 6% of 128K Cache hit 99% Input 7.8K tok · Output 79 tok