book 7: tester-round content fixes

- Bob and Dave / Martha and Sally listening stories become their own dialogue
  activities; the What-Didn't-You-Hear questions REFERENCE them (the whole
  passage no longer sits inside the question prompt)
- Brutus the Cat: the full story is a dialogue activity, and the follow-up
  questions REFERENCE it (testers had to answer from memory)
- vocab tags moved to the first line that actually teaches the word
  (gate, dog/cat/bird, run/climb inflections, sky)
- long read-only paragraph lines split into sentence-sized cards
  (airports, circle definitions, winter yard)
- self-study wording: removed classroom "this week" phrasing

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

book-7-lesson-5.module

@@ -15,7 +15,7 @@ $LESSON 5-1: Reference Words
 # Source: ST §It = Florida (l5-s1)
 $PRODUCE Pronoun Reference
 ID: l5-s1
-INTRO: Welcome to review day — nothing new this week, just proof that last week stuck. You'll read short paragraphs and type exactly who or what each pronoun points to. Read the whole paragraph first; pronouns love to point backwards.
+INTRO: Welcome to review day — nothing new here, just a chance to prove the earlier material stuck. You'll read short paragraphs and type exactly who or what each pronoun points to. Read the whole paragraph first; pronouns love to point backwards.
 INSTRUCTION: Read the paragraph and type the correct referent on the line.
 INPUT: type
 CHECK: exact
@@ -417,7 +417,7 @@ RESPONSE: My hand is smaller than my foot.
 # Source: ST §Write the Topic (l5-s11)
 $PRODUCE Find the Topic
 ID: l5-s11
-INTRO: Read about Jake and his unlucky math test, then type the paragraph's topic in a few words. Jake made one mistake this week — keep your own count lower.
+INTRO: Read about Jake and his unlucky math test, then type the paragraph's topic in a few words. Jake made one mistake on this test — keep your own count lower.
 INSTRUCTION: Read the paragraph and type the main topic.
 INPUT: type
 CHECK: llm