Fix calculation inconsistencies and chart data cutoff

- Fix chart data showing age 70 values instead of age 65 retirement values
- Update all hardcoded examples to match actual calculator output
- Recent Graduate: 75K → 94K (corrected retirement value)
- MBA Graduate: 25K → 29K (corrected retirement value)
- Medical Professional: 85K → ,065K (corrected)
- Teacher: 8K → 88K (corrected)
- Software Engineer: 12K → ,132K (corrected)
- Attorney: 5K → 54K (corrected)
- All examples now mathematically consistent with calculator logic
- Charts no longer appear to 'slow down' at retirement age

calculations.js

@@ -159,15 +159,20 @@ function calculateNetWorthComparison(params) {
         }
     }
     
+    // Find age 65 index for retirement values
+    const age65Index = allAges.findIndex(age => age === RETIREMENT_AGE);
+    const retirementWith = age65Index >= 0 ? allWithProgram[age65Index] : allWithProgram[allWithProgram.length - 1];
+    const retirementWithout = age65Index >= 0 ? allWithoutProgram[age65Index] : allWithoutProgram[allWithoutProgram.length - 1];
+    
     return {
         ages,
         withProgram,
         withoutProgram,
         payoffYears,
         annualMatch,
-        totalRetirementWith: allWithProgram[allWithProgram.length - 1],
-        totalRetirementWithout: allWithoutProgram[allWithoutProgram.length - 1],
-        retirementDifference: allWithProgram[allWithProgram.length - 1] - allWithoutProgram[allWithoutProgram.length - 1],
+        totalRetirementWith: retirementWith,
+        totalRetirementWithout: retirementWithout,
+        retirementDifference: retirementWith - retirementWithout,
         // Include full yearly data if needed
         allAges,
         allWithProgram,