feat: $ skills mention

src/lib/components/chat/Chat.svelte

@@ -2023,6 +2023,40 @@
 			}
 		}
 
+		// Parse skill mentions (<$skillId|label>) from user messages
+		const skillMentionRegex = /<\$([^|>]+)\|?[^>]*>/g;
+		const skillIds = [];
+		for (const message of messages) {
+			const content = typeof message.content === 'string' ? message.content : message.content?.[0]?.text ?? '';
+			for (const match of content.matchAll(skillMentionRegex)) {
+				if (!skillIds.includes(match[1])) {
+					skillIds.push(match[1]);
+				}
+			}
+		}
+
+		// Strip skill mentions from message content
+		if (skillIds.length > 0) {
+			messages = messages.map((message) => {
+				if (typeof message.content === 'string') {
+					return {
+						...message,
+						content: message.content.replace(/<\$[^>]+>/g, '').trim()
+					};
+				} else if (Array.isArray(message.content)) {
+					return {
+						...message,
+						content: message.content.map((part) =>
+							part.type === 'text'
+								? { ...part, text: part.text.replace(/<\$[^>]+>/g, '').trim() }
+								: part
+						)
+					};
+				}
+				return message;
+			});
+		}
+
 		const res = await generateOpenAIChatCompletion(
 			localStorage.token,
 			{
@@ -2044,6 +2078,7 @@
 
 				filter_ids: selectedFilterIds.length > 0 ? selectedFilterIds : undefined,
 				tool_ids: toolIds.length > 0 ? toolIds : undefined,
+				skill_ids: skillIds.length > 0 ? skillIds : undefined,
 				tool_servers: ($toolServers ?? []).filter(
 					(server, idx) => toolServerIds.includes(idx) || toolServerIds.includes(server?.id)
 				),