Postprod overhaul, control panel theme, caller names, website updates

- Fix denoise mangling host audio: strip aggressive afftdn/anlmdn, keep HPF only
- Add stem limiting for ads/SFX to prevent clipping
- Spoken-word compression on host (threshold -28dB, ratio 4:1)
- Add bus compressor on final stereo mix (LRA 7.9 → 5.7 LU)
- Drop SFX mix level from -6dB to -10dB
- De-esser fix: replace split-band with simple high-shelf EQ
- Pipeline now 15 steps (was 13)
- Control panel theme: match website warm brown/orange palette
- Expand caller names to 160 (80M/80F), fix duplicate name bug
- Update how-it-works page: returning callers, 15-step pipeline, remove busy diagram row

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

data/regulars.json

@@ -246,9 +246,13 @@
         {
           "summary": "Megan, a kindergarten teacher from the bootheel, called in after one of her students asked if stars know we're looking at them, which led her to reflect on how her sister Crystal in Flagstaff has stopped appreciating the night sky despite having access to it. The conversation took an unexpected turn when Luke challenged her to admit a gross habit, and after some prodding, she confessed to picking dry skin off her feet while watching TV and flicking it on the floor.",
           "timestamp": 1770870641.723117
+        },
+        {
+          "summary": "Here is a 1-2 sentence summary of the call:\n\nThe caller, Megan, is following up on a previous call about her sister Crystal, who lives in Flagstaff and has lost appreciation for the night sky. Megan seems eager to provide an update on the situation with her sister.",
+          "timestamp": 1770894505.175125
         }
       ],
-      "last_call": 1770870641.723117,
+      "last_call": 1770894505.175125,
       "created_at": 1770870641.723117,
       "voice": "cgSgspJ2msm6clMCkdW9"
     }