feat: support explicit MSN chart history

tests/cli.rs

@@ -520,8 +520,8 @@ fn msn_technical_auto_falls_back_to_yahoo() {
 }
 
 #[test]
-fn explicit_msn_history_provider_returns_unsupported() {
-    test_bin("msn-history-explicit-unsupported")
+fn explicit_msn_history_provider_uses_msn_chart_fixture() {
+    test_bin("msn-history-explicit")
         .env("IDX_PROVIDER", "msn")
         .env("IDX_USE_MOCK_PROVIDER", "1")
         .args([
@@ -534,10 +534,9 @@ fn explicit_msn_history_provider_returns_unsupported() {
             "msn",
         ])
         .assert()
-        .failure()
-        .stderr(predicate::str::contains(
-            "MSN does not provide price history",
-        ));
+        .success()
+        .stdout(predicate::str::contains("History for BBCA.JK"))
+        .stdout(predicate::str::contains("8,000"));
 }
 
 #[test]

tests/fixtures/msn_chart_bbca_3m.json

@@ -0,0 +1,17 @@
+[
+  {
+    "_p": "bn91jc",
+    "chartType": "3M",
+    "symbol": "BBCA",
+    "series": {
+      "timeStamps": [
+        "2026-01-13T17:00:00Z",
+        "2026-01-14T17:00:00Z",
+        "2026-01-15T17:00:00Z"
+      ],
+      "prices": [8000.0, 8075.0, 8025.0],
+      "startTime": "2026-01-13T17:00:00Z",
+      "endTime": "2026-01-15T17:00:00Z"
+    }
+  }
+]