test(joinir): Phase 104 read_digits loop(true) parity

apps/tests/phase103_if_only_early_return_min.hako

@@ -2,7 +2,7 @@
 // Goal: one branch returns early (no join), other returns later.
 // Expect: two numeric lines "7" then "2".
 
-box Main {
+static box Main {
   g(flag) {
     if flag == 0 {
       return 7
@@ -12,9 +12,8 @@ box Main {
   }
 
   main() {
-    print(me.g(0))
-    print(me.g(1))
+    print(g(0))
+    print(g(1))
     return "OK"
   }
 }
-

apps/tests/phase103_if_only_merge_min.hako

@@ -2,7 +2,7 @@
 // Goal: require merge (PHI-equivalent) in an if-only program (no loops),
 // and include one nested if to ensure nested merge stability.
 
-box Main {
+static box Main {
   main() {
     local x = 0
 
@@ -20,4 +20,3 @@ box Main {
     return "OK"
   }
 }
-

apps/tests/phase104_read_digits_loop_true_min.hako

@@ -0,0 +1,35 @@
+// Phase 104: read_digits_from loop(true) + break-only minimal fixture
+// Expect numeric output lines: 2 then 1
+
+static box Main {
+  read_digits_min(s, pos) {
+    local i = pos
+    local out = ""
+
+    loop(true) {
+      local ch = s.substring(i, i + 1)
+
+      // end-of-string guard
+      if ch == "" { break }
+
+      // digit check (match real-app shape; keep on one line to avoid ASI ambiguity)
+      if ch == "0" || ch == "1" || ch == "2" || ch == "3" || ch == "4" || ch == "5" || ch == "6" || ch == "7" || ch == "8" || ch == "9" {
+        out = out + ch
+        i = i + 1
+      } else {
+        break
+      }
+    }
+
+    return out
+  }
+
+  main() {
+    local a = read_digits_min("12x", 0)
+    local b = read_digits_min("9", 0)
+
+    print(a.length())
+    print(b.length())
+    return "OK"
+  }
+}