Update app.py

app.py

@@ -116,8 +116,9 @@ def generate_phrases_for_words(wordlist, mode):
 # ============================================================
 
 def generate_random_phrase():
-    wordlist = _get_mnemonic().wordlist
-    return " ".join(random.sample(wordlist, 12))
+    """BIP39 valid phrase generate karta hai — checksum ke saath."""
+    mnemo = _get_mnemonic()
+    return mnemo.generate(strength=128)   # 128 bits = 12 words
 
 
 def run_scan_range(phrase, addresses_file, phrase_mode,