fix: trim workspace and folder in saveToOctarine before building URI

The UI checks workspace.trim().length > 0 but the server used raw values.
Accidental whitespace in settings would cause Octarine saves to fail.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: backnotprop

packages/server/integrations.ts

@@ -344,7 +344,10 @@ export function generateOctarineFrontmatter(tags: string[]): string {
  */
 export async function saveToOctarine(config: OctarineConfig): Promise<IntegrationResult> {
   try {
-    const { plan, workspace, folder } = config;
+    const { plan } = config;
+    const workspace = config.workspace.trim();
+    if (!workspace) return { success: false, error: "Workspace is required" };
+    const folder = config.folder.trim() || 'plannotator';
 
     const filename = generateFilename(plan);
     // Strip .md — Octarine auto-adds it