feat: 阶段2 Python后端、用户管理、统计、单词收藏与响应式适配

server/db.py

@@ -0,0 +1,93 @@
+import os
+import sqlite3
+from datetime import datetime, timezone
+
+from werkzeug.security import generate_password_hash
+
+BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+DATA_DIR = os.path.join(BASE_DIR, "server", "data")
+DB_PATH = os.path.join(DATA_DIR, "spanish_diary.db")
+
+SCHEMA = """
+CREATE TABLE IF NOT EXISTS users (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  username TEXT UNIQUE NOT NULL,
+  password_hash TEXT NOT NULL,
+  display_name TEXT NOT NULL,
+  is_admin INTEGER NOT NULL DEFAULT 0,
+  is_active INTEGER NOT NULL DEFAULT 1,
+  created_at TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS entries (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  date TEXT NOT NULL,
+  spanish TEXT NOT NULL,
+  english TEXT NOT NULL DEFAULT '',
+  chinese TEXT NOT NULL DEFAULT '',
+  created_at TEXT NOT NULL,
+  updated_at TEXT NOT NULL
+);
+
+CREATE INDEX IF NOT EXISTS idx_entries_user_date ON entries(user_id, date);
+
+CREATE TABLE IF NOT EXISTS vocabulary (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  word TEXT NOT NULL,
+  english TEXT NOT NULL DEFAULT '',
+  chinese TEXT NOT NULL DEFAULT '',
+  category TEXT NOT NULL DEFAULT '',
+  created_at TEXT NOT NULL,
+  UNIQUE(user_id, word)
+);
+
+CREATE TABLE IF NOT EXISTS settings (
+  user_id INTEGER PRIMARY KEY REFERENCES users(id) ON DELETE CASCADE,
+  translator TEXT NOT NULL DEFAULT 'local',
+  api_url TEXT NOT NULL DEFAULT '',
+  api_key TEXT NOT NULL DEFAULT '',
+  extra_config TEXT NOT NULL DEFAULT '{}',
+  updated_at TEXT NOT NULL
+);
+"""
+
+
+def now_iso():
+    return datetime.now(timezone.utc).isoformat()
+
+
+def get_db():
+    conn = sqlite3.connect(DB_PATH)
+    conn.row_factory = sqlite3.Row
+    conn.execute("PRAGMA foreign_keys = ON")
+    return conn
+
+
+def init_db():
+    os.makedirs(DATA_DIR, exist_ok=True)
+    conn = get_db()
+    try:
+        conn.executescript(SCHEMA)
+        conn.commit()
+
+        admin = conn.execute(
+            "SELECT id FROM users WHERE username = ?", ("admin",)
+        ).fetchone()
+        if admin is None:
+            conn.execute(
+                """
+                INSERT INTO users (username, password_hash, display_name, is_admin, is_active, created_at)
+                VALUES (?, ?, ?, 1, 1, ?)
+                """,
+                (
+                    "admin",
+                    generate_password_hash("admin123"),
+                    "管理员",
+                    now_iso(),
+                ),
+            )
+            conn.commit()
+    finally:
+        conn.close()