Add enhanced Markdown to LinkedIn conversion and X thread splitter

styles.css

@@ -1,8 +1,45 @@
-/*
+.unicode-thread-modal .thread-tweet-list {
+    display: flex;
+    flex-direction: column;
+    gap: 16px;
+    margin-bottom: 16px;
+}
 
-This CSS file will be included with your plugin, and
-available in the app when your plugin is enabled.
+.unicode-thread-modal .thread-tweet-item {
+    display: flex;
+    flex-direction: column;
+    gap: 4px;
+}
 
-If your plugin does not need CSS, delete this file.
+.unicode-thread-modal .thread-tweet-header {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+}
 
-*/
+.unicode-thread-modal .thread-tweet-label {
+    font-weight: 600;
+    font-size: 0.85em;
+    color: var(--text-muted);
+}
+
+.unicode-thread-modal .thread-tweet-textarea {
+    width: 100%;
+    min-height: 60px;
+    resize: vertical;
+    font-family: var(--font-text);
+    font-size: var(--font-text-size);
+    padding: 8px;
+    border: 1px solid var(--background-modifier-border);
+    border-radius: 4px;
+    background: var(--background-secondary);
+    color: var(--text-normal);
+}
+
+.unicode-thread-modal .thread-copy-button {
+    align-self: flex-end;
+}
+
+.unicode-thread-modal .thread-copy-all-button {
+    width: 100%;
+}