Add node docs, collabora purple UI, and portable install env

Human-readable help in all six palette nodes, docs/NODES.md with usage examples, expanded example flows, and auto-detect NODERED_DIR plus CODE bridge IP from .env on any VM.

nodes/nc-office.html

@@ -1,7 +1,7 @@
 <script type="text/javascript">
     RED.nodes.registerType('nc-office', {
         category: 'nextcloud collabora',
-        color: '#46ba61',
+        color: '#7950a2',
         defaults: {
             name: { value: '' },
             config: { type: 'nc-collab-config', required: true },
@@ -41,6 +41,25 @@
 </script>
 
 <script type="text/html" data-help-name="nc-office">
-    <p>Richdocuments OCS — mallar, fält, direkt-URL, assets.</p>
+    <p><strong>Nextcloud Office-API.</strong> Trafik till Nextcloud OCS richdocuments — inte direkt till <code>/cool</code> (utom <code>files:convert</code> som internt kör WebDAV + CODE + WebDAV).</p>
+    <p>Bas: <code>.../ocs/v2.php/apps/richdocuments/api/v1/...</code></p>
+
+    <table style="width:100%; font-size:11px;">
+        <tr><th>Operation</th><th>Gör</th></tr>
+        <tr><td><code>templates:list</code></td><td>Lista mallar (ev. <code>templateType</code>)</td></tr>
+        <tr><td><code>templates:create</code></td><td>Ny fil från NC-mall</td></tr>
+        <tr><td><code>template:extractFields</code></td><td>Fält-JSON (som extract, via NC)</td></tr>
+        <tr><td><code>template:fillFields</code></td><td>Fyll mall, spara i NC</td></tr>
+        <tr><td><code>document:direct</code></td><td><code>editorUrl</code> — öppna fil i Office</td></tr>
+        <tr><td><code>document:public</code></td><td>Samma via <code>shareToken</code></td></tr>
+        <tr><td><code>files:convert</code></td><td>NC-fil → ny NC-fil (t.ex. PDF)</td></tr>
+        <tr><td><code>assets:create</code></td><td>Engångslänk för infogning i öppen editor</td></tr>
+    </table>
+
+    <p><code>fileId</code> kan saknas — slås upp med WebDAV PROPFIND från <code>ncPath</code>.</p>
     <p>Överstyr via <code>msg.operation</code>. Gemensamma fält: <code>ncPath</code>, <code>fileId</code>, <code>destNcPath</code>, <code>fields</code>.</p>
+
+    <pre>inject { ncPath: "/Dokument/avtal.docx" }
+  → nc-office (document:direct)
+  → debug (editorUrl)</pre>
 </script>