docs(integration): record Square auth lifecycle merge

.project-docs/30-worklog/tasks/20260819-integrate-square-auth-client-2f7c9a.md

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+# Task: Integrate Square auth proxy into Makelore main
+
+## Identity
+
+- Task ID: 20260819-integrate-square-auth-client-2f7c9a
+- Mode: Integration
+- Branch: codex/20260819-integrate-square-auth-client-2f7c9a-integrate-square-auth-client
+- Worktree: D:\Datas\OthersProjects\makelore-integrate-square-auth-2f7c9a
+- Base commit: 1907924203a1a998182c8e44e8884682ef216d95
+- Owner: codex-root
+- Status: In Progress
+
+## Scope
+
+- Integrate feature commit `dc776ff` from task `20260819-square-auth-proxy-client-8c4f2a` into `main` based at `1907924`.
+- Promote the desktop authentication lifecycle boundary into canonical project memory.
+- Re-run merged-tree authentication and static verification before attempting a default-branch fast-forward.
+
+## Intent And Constraints
+
+- Keep Renderer credential-free and Electron Main as the sole owner of access/refresh token persistence and idle-session cleanup.
+- Route login, refresh, and logout through fixed Works Square endpoints; do not restore the embedded OAuth client secret or direct custom-service refresh.
+- Preserve the unrelated untracked task record in the primary `main` worktree; do not adopt or overwrite another task's work without explicit authorization.
+
+## Outcome
+
+- Merged source commit `dc776ff` into the isolated candidate integration branch as merge commit `f52c2c8` without conflicts.
+- Promoted the Square-owned desktop authentication lifecycle boundary into the canonical current state, architecture flow, system boundary, decision index, and ADR-004.
+- The candidate tree is verified, but local `main` still points to `1907924`: its primary worktree contains the unrelated untracked task record `.project-docs/30-worklog/tasks/20260819-package-learning-off-115-9c4d.md`, which this task is not authorized to adopt or overwrite.
+
+## Verification
+
+- `pnpm exec vitest run tests/unit/works-square-session.test.ts tests/unit/auth-routes.test.ts`: 56 passed.
+- `pnpm exec vitest run`: 184 test files and 2,190 tests passed.
+- `pnpm run typecheck`: passed.
+- `git diff --check`: passed before task-record finalization.
+
+## Follow-ups
+
+- Obtain explicit ownership/adoption of the existing primary-worktree task record, or have its owner clean/release the `main` worktree, then fast-forward `main` to this candidate integration branch.
+- Deploy and smoke-test the matching Works Square server endpoints before releasing a desktop build.
+
+## Promotion Candidates
+
+- None; the accepted boundary is already promoted in this integration worktree.