AUTO-FIX pauses through the hours (also when pressed outside them); MIDI links without a state judged by the Mac

- AUTO-FIX: tap = pause / resume; a pause lasts through the current or the next auto-fix hours; key says ON TIL,
  OFF / ON <start>, PAUSED TIL; forcing auto-fix on outside the hours is gone
- MIDI: macOS 26 reports every live link's state, so no state there = NO ANSWER; on macOS 14/15 a link put back after
  a drop counts only after 20 s (macOS drops an unanswered one at ~12 s): no more OK/LOST flicker
- WS and SC PROP ignore the rc4 module's harmless warnings, as NA

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/test_campus.py

@@ -608,7 +608,7 @@ class TestAllAutoFix(unittest.TestCase):
     def test_the_key_names_the_paused_locations_and_sits_where_auto_fix_does(self):
         from settings import campuses as cv
         st = lambda x: json.dumps({"autofix": {"x": x}})
-        states = {"na": st("AUTO-FIX\nON\nTIL 9PM"), "sc": st("AUTO-FIX\nOFF\nTIL SUN 5AM"), "ws": st("AUTO-FIX\nOFF"), "ab": None}
+        states = {"na": st("AUTO-FIX\nON\nTIL 9PM"), "sc": st("AUTO-FIX\nPAUSED\nTIL SUN 2PM"), "ws": st("AUTO-FIX\nOFF\nON SUN 5AM"), "ab": None}
         self.assertEqual(cv.all_autofix_summary(states, 100.0), {"t": 100, "paused": 1, "x": "SC\nPAUSED"})   # WS: outside its hours
         self.assertEqual(cv.all_autofix_summary({"na": st("AUTO-FIX\nON\nTIL 9PM")}, 100.0)["x"], "ALL ON")
         na = json.load(open(os.path.join(ROOT, "config.json")))