test: Phase 114 if-only return+post parity (VM + LLVM EXE)

Phase 114 validates that if-only lowering correctly handles cases with:
- Early return in the if-only branch
- Post-if statements that execute on the else path
- Different return values from each path

Fixture: apps/tests/phase114_if_only_return_then_post_min.hako
- Expected output: 7\n2
- f(1): condition true → early return 7
- f(0): condition false → x=1+1=2, return 2

Testing:
- VM backend: phase114_if_only_return_then_post_vm.sh ✅
- LLVM EXE backend: phase114_if_only_return_then_post_llvm_exe.sh ✅
- Regression: Phase 103/113 maintained ✅

Implementation: No new code required - validates existing if-only
exit line routing and post-if statement processing.

Documentation:
- docs/development/current/main/phases/phase-114/README.md
- Updated: 10-Now.md, 01-JoinIR-Selfhost-INDEX.md

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/tests/phase114_if_only_return_then_post_min.hako

@@ -0,0 +1,17 @@
+// Phase 114: if-only return+post parity
+// Tests: early return in if-only with post-if statements
+
+static box Main {
+  f(flag) {
+    local x = 1
+    if flag == 1 { return 7 }
+    x = x + 1
+    return x
+  }
+
+  main() {
+    print(f(1))
+    print(f(0))
+    return "OK"
+  }
+}