fix(sanity): resolve 15 gaps from sanity check audit (G-01 through G-15)

- G-01: ProjectWizard renders blueprint fieldDefs with DynamicFieldInput component
- G-02: Blueprint rolePresets validated via RolePresetsSchema in wizard; API keeps loose schema
- G-03: ProjectWizard step 2/3 validation (role, hoursPerDay, headcount required)
- G-04: EstimateWizard validates baseCurrency and demand line cost rates
- G-05: Project lifecycle transition guards with ALLOWED_TRANSITIONS map
- G-06: Blueprint validator extended for minLength/maxLength/pattern and DATE range checks
- G-07: assertBlueprintDynamicFields merges global blueprint fieldDefs into validation
- G-08: (tracked — chapter managed dropdown; deferred to backend ticket)
- G-09: JSDoc added to lcrCents/ucrCents clarifying LCR/UCR terminology
- G-10: Dispo route redirect already in place — closed as done
- G-11: packages/ui empty by design — closed as documented
- G-12: @deprecated JSDoc added to CreateAllocationSchema and UpdateAllocationSchema
- G-13: ProjectWizard review step enhanced with blueprint name, field values, skills, assignments
- G-14: ProjectWizard handleSubmit collects per-item warnings instead of silent swallowing
- G-15: Vacation cancel reverses usedDays entitlement for APPROVED ANNUAL/OTHER vacations

Tests: all 1575 passing (1 pre-existing failure in insights-summary unrelated to these changes)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/web/src/components/estimates/EstimateWizard.tsx

@@ -296,11 +296,30 @@ export function EstimateWizard({ onClose }: { onClose: () => void }) {
   }
 
   function validateStep(targetStep: number) {
+    // Moving from step 0 → step 1: require name
     if (targetStep === 1 && !name.trim()) {
       setError("Estimate name is required.");
       return false;
     }
 
+    // Moving from step 0 → step 1: require base currency
+    if (targetStep === 1 && !baseCurrency.trim()) {
+      setError("Base currency is required.");
+      return false;
+    }
+
+    // Moving from step 3 (Staffing) → step 4 (Review): validate demand lines
+    if (targetStep === 4) {
+      const linesWithHours = demandLines.filter((l) => toHours(l.hours) > 0);
+      const invalid = linesWithHours.find((l) => toCents(l.costRate) <= 0);
+      if (invalid) {
+        setError(
+          `Demand line "${invalid.name || "unnamed"}" has hours but no cost rate. Please enter a cost rate or remove the line.`,
+        );
+        return false;
+      }
+    }
+
     setError(null);
     return true;
   }