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/specs/001-okr-web-app/contracts/openapi.md

@@ -0,0 +1,9 @@
+# API Contract
+
+POST /auth/login
+GET /objectives
+GET /objectives/:id
+POST /objectives
+GET /key-results/:id
+POST /key-results
+PATCH /key-results/:id/progress

docs/output/specs/001-okr-web-app/data-model.md

@@ -0,0 +1,3 @@
+# Data Model
+
+User 1:N Objective. Objective 1:N KeyResult. KeyResult 1:N ProgressUpdate. Role/status are SQLite strings constrained in service/types.

docs/output/specs/001-okr-web-app/plan.checkpoint.txid

@@ -0,0 +1 @@
+56b6f5f6-a343-4958-a557-167ef20fd392

docs/output/specs/001-okr-web-app/plan.md

@@ -0,0 +1,18 @@
+# Implementation Plan: OKR Web App
+
+## Stack
+NestJS, Prisma Client, SQLite, React, Vite, Tailwind, Zod, TanStack Query.
+
+## Backend Modules
+- auth: JWT login and cookie issuance.
+- users: admin/manager user list.
+- objectives: role-filtered list, detail, create.
+- key-results: detail, create, progress update.
+
+## Tests
+- Backend service tests.
+- Backend HTTP e2e tests.
+- TODO: define golden regression and rollback strategy.
+
+## Build
+Run npm test and npm run build for backend and frontend.

docs/output/specs/001-okr-web-app/quickstart.md

@@ -0,0 +1,7 @@
+# Quickstart
+
+1. npm install
+2. npm run db:setup -w backend
+3. npm run seed -w backend
+4. npm run dev -w backend
+5. npm run dev -w frontend

docs/output/specs/001-okr-web-app/research.md

@@ -0,0 +1,3 @@
+# Research
+
+SQLite selected to satisfy no Docker/Postgres e2e. Prisma Client remains application ORM. Node built-in sqlite applies migration SQL because Prisma schema-engine push fails in this Node 24 local environment.

docs/output/specs/001-okr-web-app/spec.md

@@ -0,0 +1,20 @@
+# Feature Specification: OKR Web App
+
+## Feature ID
+001-okr-web-app
+
+## Requirements
+- FR-01: Login authenticates username/email plus password and returns standard envelope.
+- FR-02: Objective creation validates title, owner, and quarter.
+- FR-03: Key Result creation validates objective, title, values, deadline, and progress.
+- FR-04: Progress update accepts 0-100 and stores a ProgressUpdate record.
+- FR-05: Dashboard list filters by role: ADMIN and MANAGER see all; EMPLOYEE sees own objectives.
+
+## Acceptance Criteria
+- Employee cannot read or update another employee objective or key result.
+- Manager can read all seeded objectives.
+- Invalid quarter format returns validation error.
+- Golden objective response fails on drift.
+
+## Source Trace
+Requirement characters read: 14212. Architecture characters read: 23558.

docs/output/specs/001-okr-web-app/tasks.md

@@ -0,0 +1,9 @@
+# Tasks
+
+- [X] Backend auth module with JWT and bcrypt.
+- [X] Backend users/objectives/key-results modules.
+- [X] Prisma schema, SQLite migration SQL, idempotent seed.
+- [X] Frontend login, dashboard, objective detail, create objective, key result detail.
+- [X] Backend service and e2e tests.
+- [X] Golden regression fixture and deliberate failure evidence.
+- [X] Build/test logs captured.