refactor(structure): promote app to repo root + remove redundant workspace cruft

Standard production layout: the OKR app (was nested under AINative_OKR_CASAN5/) is now
the repository root. No more wrapper directory.

- Promote AINative_OKR_CASAN5/* -> repo root (backend/ frontend/ packages/ apps/
  .specify/ docs/ infra/ nginx/ scripts/ + configs). Merge tool dirs: .gitea (kept the
  active deploy ci.yml, added harness-ci.yml + runbooks), .claude (agents/commands +
  launch.json), .github moved up.
- Remove redundant: 00_SUBMISSION_PACKAGE, scattered root notes (FPT_CASAN_Full.md,
  tu-tuong-casan.md, casan-tu-sinh..., casan_harness_assessment.md, source-review...,
  README_CASAN5_REFINED.md), casan-next-plans/ and optimize-docs/ (competition/planning
  artifacts — roadmap + design history preserved in git log / commit messages).
- Update all references to the old layout:
  - .gitea/workflows/{ci,harness-ci}.yml, .github/workflows/{ci,deploy}.yml:
    working-directory .; drop AINative_OKR_CASAN5/ prefix; .specify/{tests,scripts}
    -> packages/casan-harness/... (.specify/logs state kept)
  - .claude/launch.json, .gitea/*-runbook.md: path prefixes
  - CLAUDE.md, README.md: docs/input -> apps/okr/domain/input
  - policy-bundle.yaml: 8 policy paths -> packages/casan-harness/...; manifest re-signed
- secrets-scan.sh: fixture excludes -> new package/domain paths.

Full gate from the new root: PASS=64 FAIL=0 SKIP=3.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

docs/output/ipa-docs/bd/bd-mod01-okr-management.md

@@ -0,0 +1,11 @@
+# BD-MOD-01 OKR Management
+
+## Screen Layout
+- SCR-00 Login: centered sign-in form without sidebar.
+- SCR-01 Dashboard: fixed sidebar, fixed header, filter bar, OKR list.
+- SCR-02 Detail: objective overview, tabs, key result list.
+- SCR-03 Create Objective: title, description, owner, quarter, save.
+- SCR-04 Key Result Detail: current progress, progress input, comment, save.
+
+## API Boundary
+Frontend calls backend only through src/lib/api.ts and uses cookie/JWT auth.

docs/output/ipa-docs/dd/dd-mod01-okr-management.md

@@ -0,0 +1,10 @@
+# DD-MOD-01 OKR Management
+
+## Backend Design
+Controllers are thin and call AuthService, UsersService, ObjectivesService, KeyResultsService. PrismaService is the only database access layer.
+
+## Authorization
+JwtAuthGuard verifies Bearer/cookie token. Employees are constrained to ownerId == user.sub. Managers/Admins read all objectives.
+
+## Progress Calculation
+KeyResultsService updates progress in a transaction, writes ProgressUpdate, then recalculates objective status.

docs/output/ipa-docs/srs/srs-mod01-okr-management.md

@@ -0,0 +1,28 @@
+# SRS-MOD-01 OKR Management
+
+## TABLE OF CONTENTS
+- [1. Purpose](#1-purpose)
+- [2. Scope](#2-scope)
+- [3. Functional Requirements](#3-functional-requirements)
+- [4. Non Functional Requirements](#4-non-functional-requirements)
+
+## 1. Purpose
+Hệ thống quản lý OKR hỗ trợ đăng nhập, tạo Objective, tạo Key Result, cập nhật tiến độ và dashboard theo tài liệu yêu cầu.
+
+## 2. Scope
+Module bao gồm SCR-00 đến SCR-04, ba vai trò Admin, Manager, Employee, và dữ liệu User, Objective, Key Result.
+
+## 3. Functional Requirements
+- FR-01 Login: xác thực username/password và phát hành JWT.
+- FR-02 Create Objective: tạo Objective có title, description, owner, quarter.
+- FR-03 Create Key Result: tạo Key Result gắn với Objective.
+- FR-04 Update Progress: cập nhật progress 0-100 và ghi lịch sử cập nhật.
+- FR-05 Dashboard: hiển thị danh sách OKR theo quyền truy cập.
+
+## 4. Non Functional Requirements
+- Authentication required.
+- API response target dưới 2 giây.
+- SQLite được chọn cho kiểm thử không cần Docker.
+
+## Metrics
+Functional requirements extracted: 5.

docs/output/ipa-docs/testcase/testcase-mod01-okr-management.md

@@ -0,0 +1,8 @@
+# Test Cases MOD-01
+
+- TC-01 login rejects wrong password.
+- TC-02 employee list returns only own objectives.
+- TC-03 manager list returns all seeded objectives.
+- TC-04 invalid objective payload returns 400.
+- TC-05 progress patch updates a key result and stores progress.
+- TC-06 golden manager objective response fails on drift.