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-9-lesson-1.module

@@ -8,42 +8,42 @@ VOICE_DEFAULT: aoede | Clear, friendly American English narrator
 VOICE_INTRO: aoede | Warm, friendly narrator
 VOICE_PROMPT: gacrux | Questions and cues, read clearly
 VOICE_RESPONSE: schedar | Model answers, warm and clear
-VOICE: Man | achernar | Male
+VOICE: Man | achird | Male
 VOICE: Woman | gacrux | Female
 VOICE: Mark | achird | Male
-VOICE: Clerk | gacrux | Female
-VOICE: Jack | achernar | Male
-VOICE: Fred | achird | Male
-VOICE: Mike | achernar | Male
-VOICE: Lou | achird | Male
-VOICE: Jim | achernar | Male
-VOICE: Ray | achird | Male
-VOICE: Brad | achernar | Male
-VOICE: John | achird | Male
-VOICE: Teller | aoede | Female bank teller
-VOICE: Mrs_Morris | schedar | Female customer
-VOICE: Lt_Andrews | achernar | Male
+VOICE: Clerk | kore | Female
+VOICE: Jack | puck | Male
+VOICE: Fred | umbriel | Male
+VOICE: Mike | algieba | Male
+VOICE: Lou | zubenelgenubi | Male
+VOICE: Jim | iapetus | Male
+VOICE: Ray | charon | Male
+VOICE: Brad | alnilam | Male
+VOICE: John | orus | Male
+VOICE: Teller | gacrux | Female bank teller
+VOICE: Mrs_Morris | achernar | Female customer
+VOICE: Lt_Andrews | charon | Male
 VOICE: Capt_Miles | achird | Male
-VOICE: Tom | achernar | Male
-VOICE: Stan | achird | Male
-VOICE: Pat | schedar | Female
-VOICE: Tim | achird | Male
-VOICE: Ted | achernar | Male
-VOICE: Nancy | aoede | Female
-VOICE: Ellen | schedar | Female
+VOICE: Tom | schedar | Male
+VOICE: Stan | iapetus | Male
+VOICE: Pat | leda | Female
+VOICE: Tim | puck | Male
+VOICE: Ted | alnilam | Male
+VOICE: Nancy | gacrux | Female
+VOICE: Ellen | leda | Female
 VOICE: Bob | achird | Male
-VOICE: Lt_Sands | achernar | Male
-VOICE: Lt_Reed | achird | Male
-VOICE: Rita | aoede | Female
-VOICE: Lori | schedar | Female
-VOICE: Allen | achernar | Male
-VOICE: Roger | achird | Male
-VOICE: Peter | achernar | Male
-VOICE: Harry | achird | Male
-VOICE: Kevin | achernar | Male
-VOICE: Lt_Jones | achird | Male
-VOICE: Capt_Smith | achernar | Male
-VOICE: Ed | achird | Male
+VOICE: Lt_Sands | orus | Male
+VOICE: Lt_Reed | charon | Male
+VOICE: Rita | achernar | Female
+VOICE: Lori | kore | Female
+VOICE: Allen | charon | Male
+VOICE: Roger | algenib | Male
+VOICE: Peter | zubenelgenubi | Male
+VOICE: Harry | puck | Male
+VOICE: Kevin | orus | Male
+VOICE: Lt_Jones | sadaltager | Male
+VOICE: Capt_Smith | sadachbia | Male
+VOICE: Ed | rasalgethi | Male
 VOICE: ID | achernar | speaker (auto)
 VOICE: Narrator | achird | speaker (auto)