1. Add 登陆功能

2. 调整字体大小
3. 新增部分功能

scripts/seed_users.py

@@ -0,0 +1,84 @@
+#!/usr/bin/env python
+"""Seed demo users into the PostgreSQL users table.
+
+Run from the repo root:
+    PYTHONPATH=backend python scripts/seed_users.py
+
+Creates four demo accounts (one per role). Safe to run multiple times —
+existing usernames are left unchanged (ON CONFLICT DO NOTHING).
+"""
+
+import os
+import sys
+
+# Allow running from repo root without installing the package.
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "backend"))
+
+import psycopg2
+from passlib.context import CryptContext
+from app.config.settings import settings
+
+_PWD_CTX = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+DEMO_USERS = [
+    {"username": "admin",    "password": "Admin@2026!",   "role": "admin"},
+    {"username": "legal",    "password": "Legal@2026!",   "role": "legal"},
+    {"username": "ehs",      "password": "EHS@2026!",     "role": "ehs"},
+    {"username": "readonly", "password": "Read@2026!",    "role": "readonly"},
+]
+
+_CREATE_TABLE_SQL = """
+CREATE TABLE IF NOT EXISTS users (
+    id          UUID        PRIMARY KEY DEFAULT gen_random_uuid(),
+    username    VARCHAR(100) UNIQUE NOT NULL,
+    hashed_pw   TEXT         NOT NULL,
+    role        VARCHAR(50)  NOT NULL DEFAULT 'readonly',
+    is_active   BOOLEAN      NOT NULL DEFAULT TRUE,
+    created_at  TIMESTAMPTZ  NOT NULL DEFAULT NOW()
+);
+"""
+
+
+def seed() -> None:
+    """Insert demo users. Skips any username that already exists."""
+    conn = psycopg2.connect(
+        host=settings.postgres_host,
+        port=settings.postgres_port,
+        user=settings.postgres_user,
+        password=settings.postgres_password,
+        dbname=settings.postgres_db,
+    )
+    conn.autocommit = True
+
+    with conn.cursor() as cur:
+        # Enable pgcrypto for gen_random_uuid() if not already enabled, or use uuid-ossp fallback.
+        try:
+            cur.execute("CREATE EXTENSION IF NOT EXISTS pgcrypto;")
+        except Exception:
+            conn.rollback()
+        cur.execute(_CREATE_TABLE_SQL)
+
+    inserted = 0
+    with conn.cursor() as cur:
+        for user in DEMO_USERS:
+            hashed = _PWD_CTX.hash(user["password"])
+            cur.execute(
+                """
+                INSERT INTO users (username, hashed_pw, role)
+                VALUES (%s, %s, %s)
+                ON CONFLICT (username) DO NOTHING
+                """,
+                (user["username"], hashed, user["role"]),
+            )
+            if cur.rowcount > 0:
+                print(f"  Created user: {user['username']} (role={user['role']})")
+                inserted += 1
+            else:
+                print(f"  Skipped (already exists): {user['username']}")
+
+    print(f"\nDone. {inserted} user(s) created.")
+    conn.close()
+
+
+if __name__ == "__main__":
+    seed()