fix: strip # prefix from tags in isTaskFile for tag-based identification

Obsidian's metadata cache prepends '#' to frontmatter tag values
(e.g., tags: [task] becomes ["#task"] in cache.frontmatter.tags).
isTaskFile passes these raw values to matchesHierarchicalTagExact,
which compares "#task" against the taskTag setting value "task" and
fails to match.

Strip the '#' prefix before comparing so tag-based task identification
works correctly without requiring users to set taskTag to "#task".

Author: victoraraujo-access

src/utils/TaskManager.ts

@@ -100,9 +100,12 @@ export class TaskManager extends Events {
 		} else {
 			// Fallback to legacy tag-based method with hierarchical support
 			if (!Array.isArray(frontmatter.tags)) return false;
-			return frontmatter.tags.some((tag: string) =>
-				typeof tag === 'string' && FilterUtils.matchesHierarchicalTagExact(tag, this.taskTag)
-			);
+			return frontmatter.tags.some((tag: string) => {
+				if (typeof tag !== 'string') return false;
+				// Obsidian metadata cache prepends '#' to frontmatter tags
+				const cleanTag = tag.startsWith('#') ? tag.slice(1) : tag;
+				return FilterUtils.matchesHierarchicalTagExact(cleanTag, this.taskTag);
+			});
 		}
 	}