fix: hide Raw toggle for non-markdown files forced into raw editor

Non-markdown text files (.yml, .yaml, .json, etc.) are already forced
into raw editor mode via effectiveRawMode. This hides the Raw toggle
button in the breadcrumb bar for those files since toggling is not
applicable. Adds tests for classify_file_kind and forceRawMode behavior.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src-tauri/src/vault/mod_tests.rs

@@ -1521,6 +1521,36 @@ fn test_non_yml_file_uses_filename_as_title() {
     assert_eq!(entry.title, "notes.txt");
 }
 
+#[test]
+fn test_classify_file_kind_yml_is_text() {
+    assert_eq!(classify_file_kind(Path::new("views/active-projects.yml")), "text");
+    assert_eq!(classify_file_kind(Path::new("config.yaml")), "text");
+    assert_eq!(classify_file_kind(Path::new("data.json")), "text");
+    assert_eq!(classify_file_kind(Path::new("script.py")), "text");
+    assert_eq!(classify_file_kind(Path::new("readme.txt")), "text");
+}
+
+#[test]
+fn test_classify_file_kind_md_is_markdown() {
+    assert_eq!(classify_file_kind(Path::new("note.md")), "markdown");
+    assert_eq!(classify_file_kind(Path::new("README.markdown")), "markdown");
+}
+
+#[test]
+fn test_classify_file_kind_unknown_is_binary() {
+    assert_eq!(classify_file_kind(Path::new("photo.png")), "binary");
+    assert_eq!(classify_file_kind(Path::new("archive.zip")), "binary");
+}
+
+#[test]
+fn test_non_md_file_gets_text_file_kind() {
+    let dir = TempDir::new().unwrap();
+    create_test_file(dir.path(), "views/my-view.yml", "name: My View\nicon: rocket\n");
+    let entry = super::parse_non_md_file(&dir.path().join("views/my-view.yml"), None).unwrap();
+    assert_eq!(entry.file_kind, "text");
+    assert_eq!(entry.title, "My View");
+}
+
 // Frontmatter update/delete tests are in frontmatter.rs
 // save_image tests are in vault/image.rs
 // purge_trash tests are in vault/trash.rs