feat(coding): nest Conversations under Agents

.project-docs/30-worklog/tasks/20260825-agent-conversation-tree-4d8a2c71.md

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+# Task: Nest Conversations under the selected Agent
+
+## Identity
+
+- Task ID: 20260825-agent-conversation-tree-4d8a2c71
+- Mode: Feature
+- Branch: codex/20260825-agent-conversation-tree-4d8a2c71-agent-conversation-tree
+- Worktree: D:\Datas\OthersProjects\makelore-agent-conversation-tree-4d8a2c71
+- Base commit: c4ca16fa198a1e5a90bd1b72bf0cee22f6ee1baa
+- Owner: codex-root
+- Status: Done
+
+## Scope
+
+- Change the Makelore Code sidebar so the selected Agent is the visible parent of its Conversations instead of rendering separate sibling `伙伴` and `对话` sections.
+- Preserve the existing `agentId` ownership/filtering, Conversation selection, lazy first-Conversation creation, unread/running indicators, and new-Conversation action.
+- Add focused Renderer coverage and an Electron E2E assertion for the hierarchy; do not change project metadata, Host APIs, Pi runtime, or user data.
+
+## Intent And Constraints
+
+- Render each Agent as a collapsible parent row. Only the selected Agent expands, and its Conversation list is placed immediately beneath it with a clear `${agent.name} 的对话` label.
+- Keep all existing interactive hit areas at least 40px and retain the product's single light visual system, exact-property press transitions, and current button semantics.
+- Do not add a compatibility layer, new state model, animation dependency, or Agent/Conversation migration. The persisted relationship is already correct.
+- The user requested direct implementation without subagents.
+
+## Project Context Loaded
+
+Task context:
+- Task ID: `20260825-agent-conversation-tree-4d8a2c71`
+- Mode: feature
+- Branch: `codex/20260825-agent-conversation-tree-4d8a2c71-agent-conversation-tree`
+- Worktree: `D:\Datas\OthersProjects\makelore-agent-conversation-tree-4d8a2c71`
+- Base commit: `c4ca16fa198a1e5a90bd1b72bf0cee22f6ee1baa`
+- Other active local tasks: eleven non-ready owners were inspected through their task records.
+- Overlap or semantic-conflict assessment: the only adjacent task is the older undefined `partner-create-model-parity` diagnosis. This task does not change partner/model semantics or its files; the old Main OpenCode integration and all Canvas/Robot/Learning tasks are unrelated. No semantic conflict blocks this UI-only change.
+
+Read:
+- `.project-docs/05-agent-entry/memory-index.md`
+- `.project-docs/05-agent-entry/read-before-planning.md`
+- `.project-docs/05-agent-entry/planning-gate.md`
+- `.project-docs/00-brief/project-positioning.md`
+- `.project-docs/00-brief/success-criteria.md`
+- `.project-docs/30-worklog/current-state.md`
+- `.project-docs/10-decisions/decision-index.md`
+- `.project-docs/20-architecture/system-overview.md`
+- `.project-docs/20-architecture/module-map.md`
+- `.project-docs/20-architecture/data-flow.md`
+- `.project-docs/40-domain/business-rules.md`
+- `.project-docs/40-domain/glossary.md`
+- `.project-docs/50-evidence/evidence-index.md`
+- `.project-docs/60-reflection/reflection-index.md`
+- `.project-docs/80-commitments/commitments.md`
+- `.project-docs/90-maintenance/stale-items.md`
+- Diagnosis record `20260825-conversation-agent-binding-8a4c2e71` and PI-120/PI-130 implementation records.
+
+Relevant understanding:
+- Project goal: keep Makelore Code local and project-scoped, with Renderer access through typed facades and Main ownership of runtime and secrets.
+- Current integrated focus: the live cumulative source is the Pi hard-cut product; shared canonical memory still contains stale OpenCode-era module descriptions.
+- Active task scope: improve only the Agent → Conversation visual hierarchy in `CodingChatPanel`.
+- Active constraints: no runtime/API/storage changes; preserve all target isolation and selection behavior.
+- Decisions affecting this task: Conversation metadata is Agent-owned through mandatory `agentId`; only the selected Agent's unarchived Conversations are rendered.
+- Evidence, reflections, or commitments affecting this task: installed `testgame` has two Conversations both uniquely owned by `ccc`; no orphaned metadata exists. No shared commitment changes this UI work.
+- Files or modules likely involved: `src/pages/Chat/CodingChatPanel.tsx`, `tests/unit/coding-chat-panel.test.tsx`, and `tests/e2e/pi-coding-first-chat.spec.ts`.
+- Unknowns, stale docs, or conflicts: canonical project positioning is a placeholder and module map is OpenCode-stale; current source plus Pi task records are authoritative. No unresolved behavior conflict remains.
+
+Gate result:
+- Passed.
+
+## Plan
+
+1. Add a focused failing Renderer test that requires the selected Agent to expose an expanded child Conversation group and hides another Agent's Conversations.
+2. Move the existing Conversation header/list/create/loading block inside the selected Agent's rendered group, using a parent surface plus an indented child rail without changing selection or creation logic.
+3. Add a small production-seam E2E assertion for the visible Agent-owned group, then run focused tests, typecheck, lint, `build:vite`, and the applicable Electron E2E.
+4. Update this task record with actual outcome and verification, run the documentation gate, and commit only task-owned changes.
+
+## Outcome
+
+- Replaced the sibling `伙伴` / `对话` sidebar sections with one `伙伴与对话` hierarchy.
+- Each Agent is now an accessible expandable parent row. The selected Agent uses a concentric selected surface, expanded chevron, `aria-expanded`, and an immediately nested child group labelled `${agent.name} 的对话`.
+- Moved the existing Conversation rows, create action, first-Conversation loading indicator, unread marker, and run spinner into the selected Agent's child group without changing any state, API, storage, or runtime behavior.
+- Kept unselected Agents collapsed, so a Conversation cannot visually appear at project level or under another Agent.
+- Updated `README.md` to describe the nested Agent-owned Conversation list.
+
+## Verification
+
+- Red phase: the new hierarchy regression failed against the prior sibling layout while the other 15 `coding-chat-panel` tests passed.
+- `corepack pnpm exec vitest run tests/unit/coding-chat-panel.test.tsx --maxWorkers=1`: passed, 1 file / 16 tests.
+- `corepack pnpm run typecheck`: passed.
+- `corepack pnpm run lint:check`: passed with 0 errors and 5 pre-existing warnings outside the changed files.
+- `corepack pnpm run build:vite`: passed; existing dynamic-import and chunk-size warnings remain.
+- `corepack pnpm test`: passed; functional stage 179 files / 1523 passed / 2 skipped, isolated pressure stage 1 file / 1 passed.
+- `corepack pnpm exec playwright test tests/e2e/pi-coding-first-chat.spec.ts`: passed, 2/2. The production Renderer seam asserts the expanded `Builder` parent, nested `Builder 的对话` group, first Conversation, and second-Conversation selection inside that group.
+
+## Follow-ups
+
+- A rebuilt installer is not part of this UI source task; package from this commit only when the user requests a new installer.
+
+## Promotion Candidates
+
+- None recorded.