Improve German TTS range handling

platform/docker/tts-gateway/test_tts_gateway.py

@@ -120,6 +120,14 @@ class LanguageSegmentationTests(unittest.TestCase):
         self.assertIn("2 Uhr 14", spoken)
         self.assertIn("1. September", spoken)
 
+    def test_qwen_speaks_temperature_and_time_ranges_with_bis(self):
+        spoken = gateway.prepare_for_qwen_speech(
+            "15°–23 °C, 93 %, ca. 12 mm, vor allem um 05–06 Uhr."
+        )
+        self.assertIn("15 bis 23 Grad", spoken)
+        self.assertIn("93 Prozent", spoken)
+        self.assertIn("5 bis 6 Uhr", spoken)
+
     def test_qwen_keeps_prosody_punctuation(self):
         spoken = gateway.prepare_for_qwen_speech(
             "Ist das gut? Ja! SarahTV: erreichbar."

platform/docker/tts-gateway/tts_gateway.py

@@ -247,6 +247,20 @@ def normalize_for_german_speech(text: str) -> str:
         lambda match: f"{int(match.group(1))} Uhr {int(match.group(2))}",
         text,
     )
+    text = re.sub(
+        r"\b([01]?\d|2[0-3])\s*[-‐‑‒–—−]\s*"
+        r"([01]?\d|2[0-3])\s*Uhr\b",
+        lambda match: f"{int(match.group(1))} bis {int(match.group(2))} Uhr",
+        text,
+        flags=re.IGNORECASE,
+    )
+    text = re.sub(
+        r"(-?\d+(?:[,.]\d+)?)[ \t]*°?[ \t]*[-‐‑‒–—−][ \t]*"
+        r"(-?\d+(?:[,.]\d+)?)[ \t]*°[ \t]*(?:C)?",
+        r"\1 bis \2 Grad",
+        text,
+        flags=re.IGNORECASE,
+    )
     text = re.sub(
         r"(-?\d+(?:[,.]\d+)?)[ \t]*°[ \t]*(?:C)?[ \t]*/[ \t]*"
         r"(-?\d+(?:[,.]\d+)?)[ \t]*°[ \t]*(?:C)?",