refactor: break up voice_loop.py::run() into focused helpers (#567)

Co-authored-by: Kimi Agent <kimi@timmy.local>
Co-committed-by: Kimi Agent <kimi@timmy.local>

tests/timmy/test_voice_loop.py

@@ -236,6 +236,7 @@ class TestHallucinationFilter:
     """Whisper tends to hallucinate on silence/noise. The loop should filter these."""
 
     def test_known_hallucinations_filtered(self):
+        loop = VoiceLoop()
         hallucinations = [
             "you",
             "thanks.",
@@ -243,33 +244,35 @@ class TestHallucinationFilter:
             "Bye.",
             "Thanks for watching!",
             "Thank you for watching!",
+            "",
         ]
         for text in hallucinations:
-            assert text.lower() in (
-                "you",
-                "thanks.",
-                "thank you.",
-                "bye.",
-                "",
-                "thanks for watching!",
-                "thank you for watching!",
-            ), f"'{text}' should be filtered"
+            assert loop._is_hallucination(text), f"'{text}' should be filtered"
+
+    def test_real_speech_not_filtered(self):
+        loop = VoiceLoop()
+        assert not loop._is_hallucination("Hello Timmy")
+        assert not loop._is_hallucination("What time is it?")
 
 
 class TestExitCommands:
     """Voice loop should recognize exit commands."""
 
     def test_exit_commands(self):
+        loop = VoiceLoop()
         exits = ["goodbye", "exit", "quit", "stop", "goodbye timmy", "stop listening"]
         for cmd in exits:
-            assert cmd.lower().strip().rstrip(".!") in (
-                "goodbye",
-                "exit",
-                "quit",
-                "stop",
-                "goodbye timmy",
-                "stop listening",
-            ), f"'{cmd}' should be an exit command"
+            assert loop._is_exit_command(cmd), f"'{cmd}' should be an exit command"
+
+    def test_exit_with_punctuation(self):
+        loop = VoiceLoop()
+        assert loop._is_exit_command("goodbye!")
+        assert loop._is_exit_command("stop.")
+
+    def test_non_exit_commands(self):
+        loop = VoiceLoop()
+        assert not loop._is_exit_command("hello")
+        assert not loop._is_exit_command("what time is it")
 
 
 class TestPlayAudio: