[codex] Add structured issue-thread interactions (#4244)

## Thinking Path

> - Paperclip orchestrates AI agents for zero-human companies.
> - Operators supervise that work through issues, comments, approvals,
and the board UI.
> - Some agent proposals need structured board/user decisions, not
hidden markdown conventions or heavyweight governed approvals.
> - Issue-thread interactions already provide a natural thread-native
surface for proposed tasks and questions.
> - This pull request extends that surface with request confirmations,
richer interaction cards, and agent/plugin/MCP helpers.
> - The benefit is that plan approvals and yes/no decisions become
explicit, auditable, and resumable without losing the single-issue
workflow.

## What Changed

- Added persisted issue-thread interactions for suggested tasks,
structured questions, and request confirmations.
- Added board UI cards for interaction review, selection, question
answers, and accept/reject confirmation flows.
- Added MCP and plugin SDK helpers for creating interaction cards from
agents/plugins.
- Updated agent wake instructions, onboarding assets, Paperclip skill
docs, and public docs to prefer structured confirmations for
issue-scoped decisions.
- Rebased the branch onto `public-gh/master` and renumbered branch
migrations to `0063` and `0064`; the idempotency migration uses `ADD
COLUMN IF NOT EXISTS` for old branch users.

## Verification

- `git diff --check public-gh/master..HEAD`
- `pnpm exec vitest run packages/adapter-utils/src/server-utils.test.ts
packages/mcp-server/src/tools.test.ts
packages/shared/src/issue-thread-interactions.test.ts
ui/src/lib/issue-thread-interactions.test.ts
ui/src/lib/issue-chat-messages.test.ts
ui/src/components/IssueThreadInteractionCard.test.tsx
ui/src/components/IssueChatThread.test.tsx
server/src/__tests__/issue-thread-interaction-routes.test.ts
server/src/__tests__/issue-thread-interactions-service.test.ts
server/src/services/issue-thread-interactions.test.ts` -> 9 files / 79
tests passed
- `pnpm -r typecheck` -> passed, including `packages/db` migration
numbering check

## Risks

- Medium: this adds a new issue-thread interaction model across
db/shared/server/ui/plugin surfaces.
- Migration risk is reduced by placing this branch after current master
migrations (`0063`, `0064`) and making the idempotency column add
idempotent for users who applied the old branch numbering.
- UI interaction behavior is covered by component tests, but this PR
does not include browser screenshots.

> For core feature work, check [`ROADMAP.md`](ROADMAP.md) first and
discuss it in `#dev` before opening the PR. Feature PRs that overlap
with planned core work may need to be redirected — check the roadmap
first. See `CONTRIBUTING.md`.

## Model Used

- OpenAI Codex, GPT-5-class coding agent runtime. Exact model ID and
context window are not exposed in this Paperclip run; tool use and local
shell/code execution were enabled.

## 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
- [ ] 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>

server/src/services/plugin-host-services.ts

@@ -21,11 +21,12 @@ import type {
   PluginIssueAssigneeSummary,
   PluginIssueOrchestrationSummary,
 } from "@paperclipai/plugin-sdk";
-import type { IssueDocumentSummary } from "@paperclipai/shared";
+import type { CreateIssueThreadInteraction, IssueDocumentSummary } from "@paperclipai/shared";
 import { companyService } from "./companies.js";
 import { agentService } from "./agents.js";
 import { projectService } from "./projects.js";
 import { issueService } from "./issues.js";
+import { issueThreadInteractionService } from "./issue-thread-interactions.js";
 import { goalService } from "./goals.js";
 import { documentService } from "./documents.js";
 import { heartbeatService } from "./heartbeat.js";
@@ -1506,6 +1507,29 @@ export function buildHostServices(
         });
         return comment;
       },
+      async createInteraction(params) {
+        const companyId = ensureCompanyId(params.companyId);
+        await ensurePluginAvailableForCompany(companyId);
+        const issue = requireInCompany("Issue", await issues.getById(params.issueId), companyId);
+        const interaction = await issueThreadInteractionService(db).create(issue, params.interaction as CreateIssueThreadInteraction, {
+          agentId: params.authorAgentId ?? null,
+        });
+        await logPluginActivity({
+          companyId,
+          action: "issue.thread_interaction_created",
+          entityType: "issue",
+          entityId: issue.id,
+          actor: { actorAgentId: params.authorAgentId ?? null },
+          details: {
+            identifier: issue.identifier,
+            interactionId: interaction.id,
+            interactionKind: interaction.kind,
+            interactionStatus: interaction.status,
+            continuationPolicy: interaction.continuationPolicy,
+          },
+        });
+        return interaction as any;
+      },
     },
 
     issueDocuments: {