Make mentions clickable

src/shared/WebviewMessage.ts

@@ -19,6 +19,7 @@ export interface WebviewMessage {
 		| "requestOllamaModels"
 		| "openImage"
 		| "openFile"
+		| "openMention"
 	text?: string
 	askResponse?: ClaudeAskResponse
 	apiConfiguration?: ApiConfiguration

src/shared/context-mentions.ts

@@ -0,0 +1,9 @@
+/*
+Mention regex
+- File and folder paths (starting with '/')
+- URLs (containing '://')
+- The 'problems' keyword
+- Word boundary after 'problems' to avoid partial matches
+*/
+export const mentionRegex = /@((?:\/|\w+:\/\/)[^\s]+|problems\b)/
+export const mentionRegexGlobal = new RegExp(mentionRegex.source, "g")