test(web): refresh plan and goal recorded session metadata

These two current fixtures already contain system/message, so searching
only for stale request/header.system misses their persisted replay drift.
Both omit the shipped standard agentPreset. Plan exit must replace the
first system message (sequence 10), not append a second system prompt.
The Goal fixture's first get_goal result must reference its own tool call
at sequence 18 rather than the preceding bash call at sequence 16.

Refresh both owning browser scenarios. Retain the writer's canonical
embedded Assistant stream packing and refreshed timing where repacking
requires it. Expanded stream chunks, all 44 user/model/tool messages and
calls, and the deliberate shuf command failure remain unchanged. The
plan title remains before request/header on this lower branch. No UI,
runtime, normalizer, test-driver, or frozen v0/v1 files change.

Evidence at lower d29574fed9, reusing the dedicated tree's own prior build
(the intervening subagent spacing edits do not affect these owners):
- DSH_SNAPSHOT=replay pnpm exec vitest run --config vitest.web.config.ts apps/web/tests/{plan-review,goal-multi-turn-actions}.e2e.ts: before refresh, both owners failed persisted-session comparisons.
- DSH_SNAPSHOT=refresh pnpm exec vitest run --config vitest.web.config.ts apps/web/tests/{plan-review,goal-multi-turn-actions}.e2e.ts: 2 files passed, 4 tests passed, 1 record-only test skipped (10.24s).
- DSH_SNAPSHOT=replay pnpm exec vitest run --config vitest.web.config.ts apps/web/tests/{plan-review,goal-multi-turn-actions}.e2e.ts: 2 files passed, 4 tests passed, 1 record-only test skipped (10.24s).
- JSON payload comparison: all 44 messages/calls and expanded chunk content
  across all 14 Assistant streams preserved; stream timing is excluded.
- git diff --check passed; only the two current session.v2.jsonl files changed.

snapshots/web/plan-review/session.v2.jsonl

@@ -1,4 +1,4 @@
-{"version":2,"isSeeded":false,"createdAt":0,"cwd":"{{cwd}}","delegationDepth":0,"type":"session","id":"{{session:1}}"}
+{"type":"session","version":2,"id":"{{session:1}}","createdAt":0,"cwd":"{{cwd}}","isSeeded":false,"delegationDepth":0,"agentPreset":"standard"}
 {"type":"permission/preset","data":{"preset":"workspace-write"}}
 {"type":"sandbox/mode","data":{"mode":"workspace-write"}}
 {"type":"approval/policy","data":{"policy":"ask"}}
@@ -21,8 +21,8 @@
 {"type":"step/end","data":{"turn":1,"step":1}}
 {"type":"plan/mode","data":{"active":false}}
 {"type":"step/start","data":{"turn":1,"step":2}}
-{"type":"system/message","data":{"turn":1,"step":2,"message":{"role":"system","content":[{"type":"text","text":"{{system}}"}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"id":"{{message:6}}"}},"surfaceOp":"append"}
+{"type":"system/message","data":{"turn":1,"step":2,"message":{"role":"system","content":[{"type":"text","text":"{{system}}"}],"source":{"kind":"plugin","plugin":"@deepseek-ai/dsh-system-prompt"},"id":"{{message:6}}"}},"sourceEventSeqs":[10],"surfaceOp":{"op":"replace","start":10,"end":10}}
 {"type":"request/header","data":{"header":{"config":{"provider":"deepseek-official","model":"deepseek-v4-flash"},"tools":"{{tools}}"},"reason":"series"}}
-{"type":"assistant/message","data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The plan was approved. The user's last instruction says: \"Once the plan is approved, reply with the single word DONE and stop.\" So I should just reply with DONE and stop."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{message:7}}"},"usage":{"inputTokens":441,"outputTokens":43,"cacheReadTokens":4608,"reasoningTokens":40},"stream":[{"type":"chunk","time":0,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}},{"type":"reasoning-chunks","time0":0,"index":0,"dt":[16,17,16,16,17,16,17,17,17,16,16,17,16,17,15,16,17,17,17,16,16,16,16,17,16,17,15,16,16,16,19,16,17,16,16,17,17,16,18],"texts":["The"," plan"," was"," approved","."," The"," user","'s"," last"," instruction"," says",":"," \"","Once"," the"," plan"," is"," approved",","," reply"," with"," the"," single"," word"," D","ONE"," and"," stop",".\""," So"," I"," should"," just"," reply"," with"," D","ONE"," and"," stop","."]},{"type":"chunk","time":0,"chunk":{"type":"block-start","index":1,"blockType":"text"}},{"type":"chunk","time":0,"chunk":{"type":"text-delta","index":1,"text":"D"}},{"type":"chunk","time":0,"chunk":{"type":"text-delta","index":1,"text":"ONE"}},{"type":"chunk","time":0,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The plan was approved. The user's last instruction says: \"Once the plan is approved, reply with the single word DONE and stop.\" So I should just reply with DONE and stop."}}},{"type":"chunk","time":0,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"DONE"}}},{"type":"chunk","time":0,"chunk":{"type":"usage","usage":{"inputTokens":441,"outputTokens":43,"cacheReadTokens":4608,"reasoningTokens":40}}},{"type":"chunk","time":0,"chunk":{"type":"finish","reason":{"kind":"stop"}}}]},"surfaceOp":"append"}
+{"type":"assistant/message","data":{"turn":1,"step":2,"message":{"role":"assistant","content":[{"type":"reasoning","text":"The plan was approved. The user's last instruction says: \"Once the plan is approved, reply with the single word DONE and stop.\" So I should just reply with DONE and stop."},{"type":"text","text":"DONE"}],"source":{"kind":"model","provider":"deepseek-official","model":"deepseek-v4-flash"},"id":"{{message:7}}"},"usage":{"inputTokens":441,"outputTokens":43,"cacheReadTokens":4608,"reasoningTokens":40},"stream":[{"type":"chunk","time":1788682199938,"chunk":{"type":"block-start","index":0,"blockType":"reasoning"}},{"type":"reasoning-chunks","time0":1788682199954,"index":0,"dt":[16,16,15,15,16,15,17,16,16,16,16,17,16,16,17,17,16,16,15,16,17,17,16,17,16,17,17,16,16,15,17,16,17,16,17,16,16,16,17],"texts":["The"," plan"," was"," approved","."," The"," user","'s"," last"," instruction"," says",":"," \"","Once"," the"," plan"," is"," approved",","," reply"," with"," the"," single"," word"," D","ONE"," and"," stop",".\""," So"," I"," should"," just"," reply"," with"," D","ONE"," and"," stop","."]},{"type":"chunk","time":1788682200602,"chunk":{"type":"block-start","index":1,"blockType":"text"}},{"type":"text-chunks","time0":1788682200617,"index":1,"dt":[16],"texts":["D","ONE"]},{"type":"chunk","time":1788682200648,"chunk":{"type":"block-end","index":0,"block":{"type":"reasoning","text":"The plan was approved. The user's last instruction says: \"Once the plan is approved, reply with the single word DONE and stop.\" So I should just reply with DONE and stop."}}},{"type":"chunk","time":1788682200665,"chunk":{"type":"block-end","index":1,"block":{"type":"text","text":"DONE"}}},{"type":"chunk","time":1788682200681,"chunk":{"type":"usage","usage":{"inputTokens":441,"outputTokens":43,"cacheReadTokens":4608,"reasoningTokens":40}}},{"type":"chunk","time":1788682200698,"chunk":{"type":"finish","reason":{"kind":"stop"}}}]},"surfaceOp":"append"}
 {"type":"step/end","data":{"turn":1,"step":2}}
 {"type":"turn/end","data":{"turn":1,"reason":{"kind":"completed"}}}