Finish spillover copy corrections in chat and share card

Remove the last "shallow legs" claim and reword "retires your link" —
a qualified link keeps working and spills depth; it just stops being
the team's focus.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

public/chat.js

@@ -35,7 +35,7 @@
     {k:['30 positions','goal','milestone','matrix','how many people','team size'],
      a:()=>`The first major team goal is <strong>30 properly placed positions</strong>: 2 → 4 → 8 → 16 across the first four generations. Then we keep going — 32, 64, 128 and beyond.`},
     {k:['moving link','why not my link','own link','my referral','use my link','extra legs'],
-     a:()=>`We use a <strong>moving-link strategy</strong>: one link at a time until that position qualifies with 2 directs, then the link retires and effort moves down. That's why you should always use the sponsor shown on the <a href="/start">Getting Started page</a> — not a personal or saved link. Extra directs on a qualified link create shallow legs instead of depth.`},
+     a:()=>`We use a <strong>moving-link strategy</strong>: the team focuses on one position's link until it qualifies with 2 directs, then the effort moves down to the next position. That's why you should always use the sponsor shown on the <a href="/start">Getting Started page</a> — not an old saved link. (A qualified link still works — extra signups pay that member and spill downward as depth — but the team's focus moves to qualifying the next positions, because spillover alone never qualifies anyone.)`},
     {k:['risk','safe','scam','lose money','guarantee','guaranteed','income','earnings','legit'],
      a:()=>`Straight answer: participation involves cryptocurrency and smart-contract risk, and <strong>no income is guaranteed</strong>. Results depend on team effort, duplication, upgrades, smart-contract rules, and POL's market value. Only use funds you can afford to lose.`},
     {k:['video','videos','training','watch','tutorial','learn','how to'],