fix(json): propagate JsonFile::encode errors instead of unwrapping

PHP's JsonFile::encode throws a RuntimeException when json_encode fails; the
port swallowed that into an .unwrap() marked TODO(phase-c). Return
anyhow::Result from encode/encode_with_options and propagate at every call
site (print_table and list_repositories become Result-returning to carry it).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

2 files changed, 6 insertions, 3 deletions

diff --git a/crates/shirabe/tests/repository/vcs/forgejo_driver_test.rs b/crates/shirabe/tests/repository/vcs/forgejo_driver_test.rs
index d9138b0c..46d3832d 100644
--- a/crates/shirabe/tests/repository/vcs/forgejo_driver_test.rs
+++ b/crates/shirabe/tests/repository/vcs/forgejo_driver_test.rs
@@ -123,6 +123,7 @@ fn repo_body() -> String {
         );
         m
     }))
+    .unwrap()
 }
 
 #[test]
@@ -175,7 +176,8 @@ fn test_get_branches() {
         entry.insert("name".to_string(), PhpMixed::String("main".to_string()));
         entry.insert("commit".to_string(), PhpMixed::Array(commit));
         entry
-    })]));
+    })]))
+    .unwrap();
 
     let (http_downloader, _http_guard) = http_mock(vec![
         expect_full(
@@ -217,7 +219,8 @@ fn test_get_tags() {
         entry.insert("name".to_string(), PhpMixed::String("1.0".to_string()));
         entry.insert("commit".to_string(), PhpMixed::Array(commit));
         entry
-    })]));
+    })]))
+    .unwrap();
 
     let (http_downloader, _http_guard) = http_mock(vec![
         expect_full(
diff --git a/crates/shirabe/tests/repository/vcs/gitlab_driver_test.rs b/crates/shirabe/tests/repository/vcs/gitlab_driver_test.rs
index 2dd968ce..aa89040d 100644
--- a/crates/shirabe/tests/repository/vcs/gitlab_driver_test.rs
+++ b/crates/shirabe/tests/repository/vcs/gitlab_driver_test.rs
@@ -513,7 +513,7 @@ fn test_get_paginated_refs() {
             "2013-03-09T16:35:23.000+01:00",
         ));
     }
-    let branch_data = shirabe::json::JsonFile::encode(&PhpMixed::List(branch_data));
+    let branch_data = shirabe::json::JsonFile::encode(&PhpMixed::List(branch_data)).unwrap();
 
     let (http_downloader, _guard) = get_http_downloader_mock(
         vec![