fix(plugin-center): renew coalesced load intent

.project-docs/30-worklog/tasks/20260827-plugin-ml07-remediation-r4-8a5b3e02.md

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+# Task: Remediate accepted MakeLore ML-07 R4 finding
+
+## Identity
+
+- Task ID: 20260827-plugin-ml07-remediation-r4-8a5b3e02
+- Mode: Feature
+- Branch: codex/20260827-plugin-ml07-remediation-r4-8a5b3e02-plugin-ml07-remediation-r4
+- Worktree: D:\Datas\OthersProjects\makelore-plugin-ml07-remediation-r4-8a5b3e02
+- Base commit: 07ea9da858b4a412191747a6c80f465cf2d46d45
+- Owner: ml07-remediator
+- Status: Ready for integration
+
+## Scope
+
+- Fix the existing Plugin Center store load-flight generation handling for the exact pending A1 → pending B → A2 sequence.
+- Add focused regression coverage for both A/B completion orders while retaining consecutive duplicate-A coalescing, stable public pending keys, ordinary A-to-B latest selection, and all R3 mutation-epoch/reload behavior.
+- Change only `src/stores/coding-plugins.ts`, `tests/unit/coding-plugins-store.test.ts`, and this task record.
+
+## Intent And Constraints
+
+- A2 is a renewed latest intent for project A even when it shares A1's in-flight request; that shared flight must be promoted to the newest load generation so B cannot commit and A can commit without retry.
+- Do not merely add a latest-project check to B, because the old-generation A flight would still be unable to commit. Do not blindly increment generation before returning a coalesced flight without promoting that flight, because consecutive duplicate loads would lose commit eligibility.
+- Preserve epoch-specific load invalidation, authoritative mutation reloads, stable `load:<projectId>` pending keys, and project-scoped mutation guards from R3. Add no UI behavior or new abstraction layer.
+- Work only in the isolated exact-base task worktree; do not touch the user root/coordinator, revert peers, push, or open a PR.
+
+## Project Context Loaded
+
+- Concurrent Task Gate and Planning Gate passed for the exact task ID, feature mode, branch, worktree, base `07ea9da858b4a412191747a6c80f465cf2d46d45`, and owner `ml07-remediator`.
+- Read the project memory startup set, architecture/data-flow/domain/success criteria, ADR-006, evidence/reflection/commitment/stale indexes, coordinator scope, R4 reviewer scopes, implementation spec §§8 and 10.3, and ML-07 fixed review/remediation ticket.
+- Coordinator owns integration; R4 standards/spec tasks are read-only. No active peer has a competing semantic decision or ownership overlap with the two product/test files.
+- Plugin Center mutations must remain pending/deduplicated, project state stays Renderer-local/project-scoped, and this correction does not change Main/Pi/plugin policy authority.
+
+## Plan
+
+1. Add a red table test for A1 pending → B pending → A2, resolving B/A in both orders; assert A1/A2 share one request/promise, B never wins, final A contains A's response, and public pending keys contain no internal generation.
+2. Attach mutable generation ownership to each in-flight load. A repeated intent promotes the shared flight to a newly allocated latest generation before returning it; its completion remains eligible, while intervening B becomes stale.
+3. Run the store suite plus adjacent Plugin Center client/page/settings tests, typecheck, scoped/full lint, diff/doc gates, then return one clean sole-parent commit.
+
+## Outcome
+
+- Added intent-aware generation ownership for keyed load flights. Re-selecting a pending load promotes that existing flight to the newest generation without issuing a second request, so an intervening project load cannot commit and the renewed flight can commit without retry.
+- Preserved epoch invalidation, mutation-triggered authoritative reloads, ordinary latest-project selection, shared-flight promise identity, and stable public `load:<projectId>` pending keys.
+- Added both A1/B/A2 completion-order regressions. Before the implementation, the B-first case committed B immediately and the A-first case ended on B; both now end on the renewed A response.
+
+## Verification
+
+- RED: `corepack pnpm exec vitest run tests/unit/coding-plugins-store.test.ts` — 2 new failures / 13 existing passes, demonstrating both incorrect completion orders.
+- GREEN: `corepack pnpm exec vitest run tests/unit/coding-plugins-store.test.ts` — 15/15 passed.
+- Adjacent focused suite: `corepack pnpm exec vitest run tests/unit/coding-plugins-store.test.ts tests/unit/coding-plugins-client.test.ts tests/unit/project-plugins-page.test.tsx tests/unit/data-service-plugin-settings.test.tsx` — 24/24 passed across 4 files.
+- `corepack pnpm run typecheck` — passed.
+- `corepack pnpm exec eslint src/stores/coding-plugins.ts tests/unit/coding-plugins-store.test.ts` — passed with no findings.
+- `corepack pnpm run lint:check` — passed with 0 errors and 5 pre-existing warnings in `src/pages/Home/index.tsx` and `src/pages/Makelore/index.tsx`, outside this task's ownership.
+
+## Follow-ups
+
+- None recorded.
+
+## Promotion Candidates
+
+- None recorded.