Add GUI, packaging and export/voice tools

Introduce a tkinter GUI and tooling to produce a single executable and export/convert message data. Adds app_gui.py (GUI launcher that runs decrypt/export/voice subtasks), export_messages.py (export messages to CSV/HTML/JSON), voice_to_mp3.py (extract SILK_V3 voice blobs and convert to MP3 via pilk + ffmpeg), WeChatDecrypt.spec and build.bat (PyInstaller spec and convenience build script), and EXE_USAGE.md (usage for the standalone exe). Update config.py to detect the application base directory when packaged, update README.md to document the GUI and packaging flow, and add pilk/pyinstaller to requirements.txt. Also expand .gitignore with common IDE/build/temp patterns and add output/data directories to ignore. These changes enable one-file packaging and provide end-user tools for decrypting, exporting and converting audio.

voice_to_mp3.py

@@ -0,0 +1,123 @@
+"""从 media_0.db 提取所有语音数据，按用户名分目录，SILK_V3 转 MP3"""
+import sqlite3
+import subprocess
+import tempfile
+import os
+import sys
+from datetime import datetime
+
+if sys.platform == "win32" and hasattr(sys.stdout, "reconfigure"):
+    sys.stdout.reconfigure(encoding="utf-8", errors="replace")
+
+import pilk
+
+DB_PATH = r"decrypted\message\media_0.db"
+CONTACT_DB_PATH = r"decrypted\contact\contact.db"
+OUTPUT_DIR = "data"
+
+def silk_to_mp3(voice_data, output_path):
+    """将微信 SILK 语音数据转换为 MP3"""
+    # 去掉微信格式的 0x02 前缀
+    if voice_data[0:1] == b'\x02':
+        silk_data = voice_data[1:]
+    else:
+        silk_data = voice_data
+
+    if not silk_data.startswith(b'#!SILK_V3'):
+        print(f"  警告：数据不以 #!SILK_V3 开头，跳过")
+        return False
+
+    # 补上结尾标记
+    if not silk_data.endswith(b'\xff\xff'):
+        silk_data += b'\xff\xff'
+
+    silk_file = tempfile.mktemp(suffix=".silk")
+    pcm_file = tempfile.mktemp(suffix=".pcm")
+    try:
+        with open(silk_file, "wb") as f:
+            f.write(silk_data)
+
+        pilk.decode(silk_file, pcm_file)
+
+        result = subprocess.run([
+            "ffmpeg", "-y", "-f", "s16le", "-ar", "24000", "-ac", "1",
+            "-i", pcm_file, output_path
+        ], capture_output=True, encoding="utf-8", errors="replace")
+        return result.returncode == 0
+    finally:
+        if os.path.exists(silk_file):
+            os.remove(silk_file)
+        if os.path.exists(pcm_file):
+            os.remove(pcm_file)
+
+# 1. 读取 Name2Id 映射 (rowid -> user_name)
+conn = sqlite3.connect(DB_PATH)
+name_map = {}
+for rowid, user_name in conn.execute("SELECT rowid, user_name FROM Name2Id"):
+    name_map[rowid] = user_name
+print(f"共 {len(name_map)} 个用户")
+
+# 2. 读取 contact 信息 (user_name -> {remark, nick_name, alias, ...})
+contact_map = {}
+try:
+    cconn = sqlite3.connect(CONTACT_DB_PATH)
+    for row in cconn.execute("SELECT username, alias, remark, nick_name FROM contact"):
+        uname, alias, remark, nick_name = row
+        contact_map[uname] = {"username": uname, "alias": alias or "", "remark": remark or "", "nick_name": nick_name or ""}
+    cconn.close()
+    print(f"联系人数据库加载: {len(contact_map)} 条")
+except Exception as e:
+    print(f"联系人数据库读取失败: {e}")
+
+def display_name(user_name):
+    """优先 remark > nick_name > user_name"""
+    info = contact_map.get(user_name, {})
+    return info.get("remark") or info.get("nick_name") or user_name
+
+def safe_dirname(name):
+    """替换目录名中的非法字符"""
+    for ch in r'\/:*?"<>|':
+        name = name.replace(ch, "_")
+    return name.strip() or "unknown"
+
+# 2. 查询所有语音，按 chat_name_id 关联用户名
+rows = conn.execute("SELECT chat_name_id, create_time, local_id, voice_data FROM VoiceInfo ORDER BY chat_name_id, create_time").fetchall()
+conn.close()
+print(f"共 {len(rows)} 条语音")
+
+# 3. 遍历转换
+success = 0
+fail = 0
+for chat_name_id, create_time, local_id, voice_data in rows:
+    user_name = name_map.get(chat_name_id, f"unknown_{chat_name_id}")
+    dname = safe_dirname(display_name(user_name))
+    dt = datetime.fromtimestamp(create_time)
+    filename = dt.strftime("%Y%m%d_%H%M%S") + f"_{local_id}.mp3"
+
+    user_dir = os.path.join(OUTPUT_DIR, dname)
+    os.makedirs(user_dir, exist_ok=True)
+
+    # 写入 .info 文件（只写一次）
+    info_path = os.path.join(user_dir, ".info")
+    if not os.path.exists(info_path):
+        info = contact_map.get(user_name, {"username": user_name, "alias": "", "remark": "", "nick_name": ""})
+        with open(info_path, "w", encoding="utf-8") as f:
+            f.write(f"username:  {info['username']}\n")
+            f.write(f"alias:     {info['alias']}\n")
+            f.write(f"nick_name: {info['nick_name']}\n")
+            f.write(f"remark:    {info['remark']}\n")
+
+    output_path = os.path.join(user_dir, filename)
+    if os.path.exists(output_path):
+        success += 1
+        continue
+
+    ok = silk_to_mp3(voice_data, output_path)
+    if ok:
+        success += 1
+        print(f"  [{success}/{len(rows)}] {dname}/{filename}")
+    else:
+        fail += 1
+        print(f"  失败: {dname}/{filename}")
+
+print(f"\n完成: 成功 {success}, 失败 {fail}")