fix(al): guard against missing position in name cache storage

Only store the original name in the cache if we have valid position data.
This prevents false cache matches at position (0, 0) when selectionRange
is missing from a symbol.

Addresses PR #960 review comment.

src/solidlsp/language_servers/al_language_server.py

@@ -1028,13 +1028,16 @@ class ALLanguageServer(SolidLanguageServer):
             normalized_name = extract_al_display_name(original_name)
 
             # Store original name if it was normalized (for hover injection)
+            # Only store if we have valid position data to avoid false matches at (0, 0)
             if original_name != normalized_name:
-                sel_range = symbol.get("selectionRange", {})
-                start = sel_range.get("start", {})
-                line = start.get("line", 0)
-                char = start.get("character", 0)
-                normalized_path = self._normalize_path(relative_file_path)
-                self._al_original_names[(normalized_path, line, char)] = original_name
+                sel_range = symbol.get("selectionRange")
+                if sel_range:
+                    start = sel_range.get("start")
+                    if start and "line" in start and "character" in start:
+                        line = start["line"]
+                        char = start["character"]
+                        normalized_path = self._normalize_path(relative_file_path)
+                        self._al_original_names[(normalized_path, line, char)] = original_name
 
             symbol["name"] = normalized_name