feat(polish): allow mood emoji on custom styles and ship Flow/ASR fixes

Custom polish styles can opt in to emotion-matched emoji (default off), with
prompt-level opt-in detection so paste-only styles keep model-added emoji.
Also include Volcengine API-Key ASR auth, voice-processing capture, PiP flash
fix, and related keyboard Shift/haptics reliability work.

OSGKeyboardTests/FlowReliabilityTests.swift

@@ -220,4 +220,14 @@ final class FlowReliabilityTests: XCTestCase {
             )
         )
     }
+
+    func testCaptureVoiceProcessingUsesSpeechOrientedSessionMode() {
+        XCTAssertEqual(FlowCaptureVoiceProcessing.captureMode, .voiceChat)
+        XCTAssertTrue(
+            FlowCaptureVoiceProcessing.captureOptions.contains(.allowBluetoothHFP)
+        )
+        XCTAssertTrue(
+            FlowCaptureVoiceProcessing.captureOptions.contains(.defaultToSpeaker)
+        )
+    }
 }