Consolidate duplicate helper functions and improve test maintainability

- Create shared MockVWAPTracker.sol to eliminate duplicate mock implementations
- Add TestBase.sol with shared utilities (getDefaultParams, bp, denormTR)
- Update CSVHelper.sol to use Forge's vm.toString() instead of manual conversion
- Standardize tick calculation function names across test files
- Update test files to use consolidated utilities
- Remove helper function inventory (consolidation complete)

Eliminates 200-300 lines of duplicate code while maintaining 100% test compatibility.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

onchain/test/ModularComponentsTest.t.sol

@@ -5,6 +5,7 @@ import "forge-std/Test.sol";
 import "../src/libraries/UniswapMath.sol";
 import "../src/abstracts/PriceOracle.sol";
 import "../src/abstracts/ThreePositionStrategy.sol";
+import "./helpers/TestBase.sol";
 
 /**
  * @title Modular Components Test
@@ -25,12 +26,12 @@ contract TestUniswapMath is UniswapMath, Test {
         assertLe(tick, 887272, "Tick should be <= MAX_TICK");
     }
     
-    function getTickAtPrice(bool t0isWeth, uint256 tokenAmount, uint256 ethAmount) external pure returns (int24) {
+    function tickAtPrice(bool t0isWeth, uint256 tokenAmount, uint256 ethAmount) external pure returns (int24) {
         return _tickAtPrice(t0isWeth, tokenAmount, ethAmount);
     }
 }
 
-contract ModularComponentsTest is Test {
+contract ModularComponentsTest is TestUtilities {
     TestUniswapMath testMath;
     
     function setUp() public {
@@ -39,7 +40,7 @@ contract ModularComponentsTest is Test {
     
     function testUniswapMathCompilation() public {
         // Test that mathematical utilities work
-        int24 tick = testMath.getTickAtPrice(true, 1 ether, 1 ether);
+        int24 tick = testMath.tickAtPrice(true, 1 ether, 1 ether);
         
         // Should get a reasonable tick for 1:1 ratio
         assertGt(tick, -10000, "Tick should be reasonable");