books 9-12: HIDE_PROMPT backfill — leak-shape locks, transcripts restored to clip-only prompts

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

book-10-lesson-2.module

@@ -631,6 +631,7 @@ $PRODUCE Spell the Words
 ID: 10-2b-f3-spelling
 INPUT: type
 CHECK: exact
+HIDE_PROMPT
 INTRO: Now spell the new words. Listen to each word and type it — "neighbor" is the one that catches everybody.
 INSTRUCTION: Type the word you hear.
 
@@ -1090,6 +1091,7 @@ $PRODUCE Type What You Hear: Opening a Bank Account
 ID: 10-2b-f7
 INPUT: type
 CHECK: exact
+HIDE_PROMPT
 INTRO: To finish this part, type each sentence you hear, exactly. The sentences explain how to open a bank account — useful twice over.
 INSTRUCTION: Type the sentence you hear.
 
@@ -1179,6 +1181,7 @@ ID: 10-2c-f2
 REFERENCE: 10-2c-f2-dialogue
 INTRO: Answer the questions about the weather conversation.
 INSTRUCTION: Tap the correct answer.
+HIDE_PROMPT
 
 PROMPT: Where did they have ice on the roads? {bk10-l2c-f2-06.mp3}
 OPTION: a | in the north
@@ -1307,6 +1310,7 @@ REFERENCE: 10-2c-f5-story
 INTRO: You'll hear each sentence with "will". Type the simple present form of the verb instead, then repeat the whole sentence.
 INSTRUCTION: Type the correct present tense verb.
 REPEAT
+HIDE_PROMPT
 
 EXAMPLE
 TEMPLATE: The Smiths ____ on vacation all of next month. (will be)
@@ -2188,6 +2192,7 @@ ID: 2d-f3
 INTRO: Listen to each sentence and tap the place word you hear in it. Then repeat the sentence.
 INSTRUCTION: Tap the preposition you hear.
 REPEAT
+HIDE_PROMPT
 
 EXAMPLE
 PROMPT: The book is on the table. {bk10-l2d-f3-ex.mp3}
@@ -2398,6 +2403,7 @@ INTRO: Last activity of the lesson. Listen to each sentence again and type the m
 INSTRUCTION: Type the missing word(s).
 INPUT: type
 CHECK: exact
+HIDE_PROMPT
 
 PROMPT: I don't like this vending machine. {bk10-l2d-f5-08.mp3}
 TEMPLATE: I don't like this ____.