Add recovery handoff system notices (#5289)

## Thinking Path

> - Paperclip orchestrates AI agents for zero-human companies.
> - Agent runs can end productively while the source issue still lacks a
durable final disposition.
> - That leaves the control plane unsure whether to resume, escalate, or
close the work.
> - Issue comments also need a presentation contract so system-authored
recovery notices can render as first-class thread messages without
overloading normal comments.
> - This pull request adds successful-run handoff recovery, comment
presentation metadata, and system notice rendering.
> - The benefit is stricter task liveness with clearer operator-facing
recovery state.

## What Changed

- Added successful-run handoff decisions, wake payloads, escalation
behavior, and recovery tests.
- Added issue comment presentation metadata with migration
`0078_white_darwin.sql` and shared/server/company portability support.
- Rendered recovery/system notices in issue chat with dedicated UI
components, fixtures, tests, and storybook/lab coverage.
- Included the current recovery model-profile hint patch so automatic
recovery follow-ups use the cheap profile.

## Verification

- `pnpm install --frozen-lockfile`
- `pnpm exec vitest run
server/src/services/recovery/successful-run-handoff.test.ts
ui/src/components/SystemNotice.test.tsx
ui/src/lib/system-notice-comment.test.ts
ui/src/components/IssueChatThreadSystemNotice.test.tsx`

## Risks

- Migration-bearing PR: merge this before any other branch that might
later add a migration.
- The branch touches both recovery services and issue-thread rendering,
so review should pay attention to recovery wake idempotency and comment
metadata compatibility.

## Model Used

- OpenAI GPT-5 Codex via Paperclip `codex_local` adapter, with
shell/git/GitHub CLI tool use.

## Checklist

- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] If this change affects the UI, I have included before/after
screenshots
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [x] I will address all Greptile and reviewer comments before
requesting merge

---------

Co-authored-by: Paperclip <noreply@paperclip.ing>

ui/storybook/stories/chat-comments.stories.tsx

@@ -84,6 +84,7 @@ function ScenarioCard({
 
 function createComment(overrides: Partial<StoryComment>): StoryComment {
   const createdAt = overrides.createdAt ?? new Date("2026-04-20T14:00:00.000Z");
+  const authorAgentId = overrides.authorAgentId ?? null;
   return {
     id: "comment-default",
     companyId,
@@ -91,6 +92,9 @@ function createComment(overrides: Partial<StoryComment>): StoryComment {
     authorAgentId: null,
     authorUserId: currentUserId,
     body: "",
+    authorType: authorAgentId ? "agent" : "user",
+    presentation: null,
+    metadata: null,
     createdAt,
     updatedAt: overrides.updatedAt ?? createdAt,
     ...overrides,
@@ -384,6 +388,42 @@ const issueChatComments: IssueChatComment[] = [
     runId: "run-issue-chat-01",
     runAgentId: codexAgent.id,
   }),
+  createComment({
+    id: "comment-issue-system-warning",
+    authorType: "system",
+    authorAgentId: null,
+    authorUserId: null,
+    runId: "run-issue-chat-01",
+    runAgentId: codexAgent.id,
+    body: "Paperclip needs a disposition before this issue can continue.",
+    presentation: {
+      kind: "system_notice",
+      tone: "warning",
+      title: "Missing issue disposition",
+      detailsDefaultOpen: false,
+    },
+    metadata: {
+      version: 1,
+      sections: [
+        {
+          title: "Required action",
+          rows: [
+            { type: "issue_link", label: "Source issue", issueId: issueId, identifier: "PAP-3440", title: "Successful run handoff" },
+            { type: "agent_link", label: "Assignee", agentId: codexAgent.id, name: codexAgent.name },
+            { type: "key_value", label: "Status before", value: "in_progress" },
+          ],
+        },
+        {
+          title: "Run evidence",
+          rows: [
+            { type: "run_link", label: "Successful run", runId: "run-issue-chat-01", title: "succeeded" },
+            { type: "key_value", label: "Normalized cause", value: "Run completed without disposition" },
+          ],
+        },
+      ],
+    },
+    createdAt: new Date("2026-04-20T13:54:00.000Z"),
+  }),
   createComment({
     id: "comment-issue-queued",
     body: "@QAChecker please do a quick visual pass after the Storybook build is green.",