voice audit: gender-correct Gemini voices for all dialogue speakers (398/982 were mismatched, mostly female achernar on male roles); recurring characters keep one voice course-wide; distinct voices within dialogues

Co-authored-by: Cursor <cursoragent@cursor.com>

book-12-lesson-1.module

@@ -7,41 +7,41 @@ VOICE_DEFAULT: aoede | Clear, friendly American English narrator
 VOICE_INTRO: aoede | Warm, lightly witty teacher voice
 VOICE_PROMPT: gacrux | Questions and cues, read clearly
 VOICE_RESPONSE: schedar | Model answers, warm and clear
-VOICE: SpeakerA | achernar | Male
+VOICE: SpeakerA | achird | Male
 VOICE: SpeakerB | schedar | Male
-VOICE: Roger | achernar | Male student
-VOICE: Friend | schedar | Male student
-VOICE: Henry | achird | Male
-VOICE: Pete | achernar | Male
+VOICE: Roger | algenib | Male student
+VOICE: Friend | achird | Male student
+VOICE: Henry | iapetus | Male
+VOICE: Pete | alnilam | Male
 VOICE: Sarah | gacrux | Female
-VOICE: Betty | aoede | Female speaker
-VOICE: Mary | aoede | Female speaker
-VOICE: Paul | achernar | Male speaker
-VOICE: Sam | achird | Male speaker
-VOICE: Jim | schedar | Male speaker
-VOICE: Joe | gacrux | Male speaker
-VOICE: John | achernar | Male speaker
+VOICE: Betty | gacrux | Female speaker
+VOICE: Mary | achernar | Female speaker
+VOICE: Paul | rasalgethi | Male speaker
+VOICE: Sam | charon | Male speaker
+VOICE: Jim | iapetus | Male speaker
+VOICE: Joe | zubenelgenubi | Male speaker
+VOICE: John | orus | Male speaker
 VOICE: Mark | achird | Male speaker
-VOICE: Kim | aoede | Female speaker
+VOICE: Kim | kore | Female speaker
 VOICE: Ali | schedar | Male speaker
-VOICE: Pat | gacrux | Male speaker
-VOICE: Luke | achernar | Male speaker
-VOICE: Tony | achird | Male speaker
-VOICE: Andy | schedar | Male speaker
-VOICE: Art | gacrux | Male speaker
-VOICE: Phil | achernar | Male speaker
-VOICE: Tim | achird | Male speaker
-VOICE: Sharif | schedar | Male speaker
-VOICE: Owen | gacrux | Male speaker
-VOICE: Chuck | achernar | Male speaker
+VOICE: Pat | fenrir | Male speaker
+VOICE: Luke | sadaltager | Male speaker
+VOICE: Tony | umbriel | Male speaker
+VOICE: Andy | algieba | Male speaker
+VOICE: Art | sadachbia | Male speaker
+VOICE: Phil | algenib | Male speaker
+VOICE: Tim | puck | Male speaker
+VOICE: Sharif | achird | Male speaker
+VOICE: Owen | enceladus | Male speaker
+VOICE: Chuck | alnilam | Male speaker
 VOICE: Bob | achird | Male speaker
-VOICE: Don | schedar | Male speaker
-VOICE: Jack | gacrux | Male speaker
-VOICE: Bill | achernar | Male speaker
+VOICE: Don | umbriel | Male speaker
+VOICE: Jack | puck | Male speaker
+VOICE: Bill | charon | Male speaker
 VOICE: Dale | achird | Male speaker
 VOICE: Gene | schedar | Male speaker
 VOICE: Lynn | aoede | Female speaker
-VOICE: Gwen | aoede | Female speaker
+VOICE: Gwen | achernar | Female speaker
 VOICE: ID | achernar | speaker (auto)
 VOICE: Narrator | achird | speaker (auto)