Front-load strategy mode: pocket 50% until L6, then 25% (near-identical arrival to flat 25%, ~double the early draw)

- pocketPctFor(): per-phase pocket resolution ('frontload' sentinel); computePlan/boostSim/plan-text/summary-card all honor it
- strategy select + share param mode=frontload + Sponsor Guide entry
- tests 7b: frontload matches 50%-behavior below L6 and 25%-behavior from L6, total <= flat-50

test_scenarios.js

@@ -135,6 +135,23 @@ console.log("7) strategy modes:");
   check("parked timeline runs 10 collection cycles", tl.length === 10);
 }
 
+console.log("7b) Front-load strategy (pocket 50% until L6, then 25%):");
+{
+  const phases = getPhaseSequence(0);
+  const fl = computePlan(phases, "frontload");
+  const p25 = computePlan(phases, 25);
+  const p50 = computePlan(phases, 50);
+  for (const k of phases) {
+    if (k === "3xL7") continue;
+    const isLate = Math.max(...PHASE_SLOTS[k]) >= 6;
+    const want = isLate ? p25[k].cycles : p50[k].cycles;
+    check(`frontload ${k} = ${isLate ? "25%" : "50%"} behavior (${fl[k].cycles}cy)`,
+      fl[k].cycles === want, `want ${want}`);
+  }
+  const total = (plan) => phases.reduce((s, k) => s + plan[k].cycles, 0);
+  check(`frontload total ${total(fl)} <= flat-50 total ${total(p50)}`, total(fl) <= total(p50));
+}
+
 console.log("8) Boost Planner (extra-funds combos, Marty 2026-07-31):");
 {
   // 8a. boostSim with $0 extra must agree with computePlan for every start.