fix(preview): add fallback title for special files and broken symlinks

Author: NIKHILSHIRKE56

src/rovr/core/preview_container.py

@@ -64,7 +64,6 @@
 
 PREVIEWER_GROUP = "previewers"
 TEXT_PREVIEW_CACHE_VERSION = "windowed-v2"
-FONT_PREVIEW_CACHE_VERSION = "font-v2"
 BAT_PREVIEW_CACHE_VERSION = "paged-v2"
 BAT_PREVIEW_PAGE_SIZE = 256
 BAT_PREVIEWER_GROUP = "bat-pages"
@@ -359,9 +358,15 @@ async def file_not_found(
             return
         try:
             if dir_entry.is_symlink():
-                await self.mount(
-                    Static("The symlink target is not found!", classes="special")
-                )
+                self.set_border("title", "Broken Symlink")
+                try:
+                    target_path = os.readlink(location)
+                    msg = f"The symlink target is not found!\nTarget: {target_path}"
+                except OSError:
+                    msg = "The symlink target is not found!"
+
+                await self.mount(Static(msg, classes="special"))
+
                 # also update option if necessary
                 if isinstance(
                     highlighted_option, FileListSelectionWidget
@@ -411,7 +416,7 @@ def show_font_preview(self) -> None:
             )
             return
         signature = (
-            f"{FONT_PREVIEW_CACHE_VERSION}:{preview_utils.MAX_FONT_SIZE}:{config['interface']['font_preview']['font_size']}",
+            f"{preview_utils.MAX_FONT_SIZE}:{config['interface']['font_preview']['font_size']}",
             f"{self._preview_texts['font_text']}:{fg_color.hex}:{bg_color.hex}:{NewImage.func.__name__}",
         )
         img = _load_cached_image(realpath, "font", stat_result, signature)
@@ -1652,8 +1657,7 @@ def mount_special_messages(self) -> None:
             return
         self.log(self._mime_type)
         assert isinstance(self._current_content, str)
-        title = self._mime_type.method if self._mime_type else "Preview"
-        self.set_border("title", title)
+        self.set_border("title", self._mime_type.method if self._mime_type else "Preview")
 
         display_content: str = self._current_content
         if self._mime_type: