ci: migrate retired macOS 14 runners to macOS 15

.github/workflows/python-local-models.yml

@@ -22,7 +22,7 @@ jobs:
           - os: ubuntu-24.04
             extra: local-cu128
             profile: cu128
-          - os: macos-14
+          - os: macos-15
             extra: local-mps
             profile: mps
           - os: ubuntu-24.04

.github/workflows/python-macos.yml

@@ -10,7 +10,7 @@ jobs:
     # macOS product path is T1 core + T2 remote voice: install T1+T2, verify
     # the voice import contract (brew portaudio → PyAudio source build), lint,
     # run platform-safe contract tests, and compile the Electron renderer.
-    runs-on: macos-14
+    runs-on: macos-15
     timeout-minutes: 40
     env:
       AMADEUS_E2E_NO_TTS: "1"

docs/install_profiles.md

@@ -77,7 +77,7 @@ and removes the optional voice/model stack. Ordinary application launch uses the
 installed environment, without synchronizing or changing its selected extras.
 
 Windows is the current reference platform. macOS core/voice has a separate CI
-qualification path and needs PortAudio for PyAudio; the macos-14 candidate job
+qualification path and needs PortAudio for PyAudio; the macos-15 candidate job
 also installs `local-mps` and switches back through T3 vad. A successful install, import
 or Electron build does not replace microphone, playback and desktop acceptance.
 The reference cu124 profile is Windows-only. The cu128 candidate targets