Link the clients and channels named in server log lines

Log lines now name clients and channels with TeamSpeak's own client:// and
channel:// links, the same ones a dragged-in reference produces, so the
chat log's existing handling turns them into the context menus.

The log is rendered with a links-only pass rather than the full BBCode
renderer: its lines are assembled by the client itself, so nothing else in
them should be interpreted — a channel called "[b]VIP" stays literal.
Channels we no longer have (a deleted one) are still named in plain text.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

ts3-client/core/src/test/java/com/ts3client/text/BBCodeLinksTest.java

@@ -0,0 +1,40 @@
+package com.ts3client.text;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * The server log's renderer: it turns the client's own links into anchors and leaves
+ * everything else — names carrying bracket markup included — as plain text.
+ */
+class BBCodeLinksTest {
+
+    @Test
+    void rendersClientAndChannelLinks() {
+        String log = TsLink.clientBBCode(7, "uid=", "Bob") + " connected to channel \""
+                + TsLink.channelBBCode(3, "Lobby") + "\"";
+        String html = BBCode.linksToHtml(log);
+        assertTrue(html.contains("href=\"client://7/uid=~Bob\""), html);
+        assertTrue(html.contains(">Bob</a>"), html);
+        assertTrue(html.contains("href=\"channel://3/Lobby\""), html);
+        assertTrue(html.contains(">Lobby</a>"), html);
+    }
+
+    @Test
+    void leavesOtherMarkupLiteral() {
+        assertEquals("[b]not bold[/b] &amp; &lt;i&gt;", BBCode.linksToHtml("[b]not bold[/b] & <i>"));
+    }
+
+    @Test
+    void keepsBracketsInsideALabelLiteral() {
+        String html = BBCode.linksToHtml(TsLink.channelBBCode(3, "[cspacer]---"));
+        assertTrue(html.contains(">[cspacer]---</a>"), html);
+    }
+
+    @Test
+    void rejectsHrefsThatAreNotLinks() {
+        assertEquals("[url=javascript:alert(1)]x[/url]", BBCode.linksToHtml("[url=javascript:alert(1)]x[/url]"));
+    }
+}