diff --git a/main.go b/main.go
index 1466af1..13da640 100644
--- a/main.go
+++ b/main.go
@@ -287,9 +287,6 @@ func pageSync(w http.ResponseWriter, r *http.Request) { // {{{
 } // }}}
 
 func actionSyncFromServer(w http.ResponseWriter, r *http.Request) { // {{{
-	// XXX - DELETE ME!
-	time.Sleep(time.Millisecond * 200)
-
 	// The purpose of the Client UUID is to avoid
 	// sending nodes back once again to a client that
 	// just created or modified it.
diff --git a/static/images/icon_file_download.svg b/static/images/icon_file_download.svg
new file mode 100644
index 0000000..3eb3364
--- /dev/null
+++ b/static/images/icon_file_download.svg
@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="19.200001"
+   height="24"
+   viewBox="0 0 5.0800001 6.35"
+   version="1.1"
+   id="svg1"
+   inkscape:version="1.4.4 (dcaf3e7d9e, 2026-05-05)"
+   sodipodi:docname="icon_file_download.svg"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     inkscape:document-units="px"
+     inkscape:zoom="1.0503157"
+     inkscape:cx="-237.54763"
+     inkscape:cy="49.984973"
+     inkscape:window-width="2190"
+     inkscape:window-height="1401"
+     inkscape:window-x="1463"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1" />
+  <defs
+     id="defs1" />
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-167.74583,-135.20208)">
+    <title
+       id="title1">file-download-outline</title>
+    <path
+       d="m 170.92084,135.20208 1.90499,1.905 v 3.81 a 0.6349996,0.6349996 0 0 1 -0.635,0.635 h -3.81 a 0.6349996,0.6349996 0 0 1 -0.635,-0.635 v -5.08 a 0.6349996,0.6349996 0 0 1 0.635,-0.635 h 2.54001 m 1.26999,5.715 v -3.49249 h -1.5875 v -1.58751 h -2.2225 v 5.08 h 3.81 m -1.905,-0.3175 -1.26999,-1.26999 h 0.79374 v -0.9525 h 0.9525 v 0.9525 h 0.79375 z"
+       id="path1"
+       style="stroke-width:0.317499" />
+  </g>
+</svg>
diff --git a/static/images/icon_file_upload.svg b/static/images/icon_file_upload.svg
new file mode 100644
index 0000000..fca3313
--- /dev/null
+++ b/static/images/icon_file_upload.svg
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="19.200001"
+   height="24"
+   viewBox="0 0 5.0800001 6.35"
+   version="1.1"
+   id="svg1"
+   inkscape:version="1.4.4 (dcaf3e7d9e, 2026-05-05)"
+   sodipodi:docname="icon_file_upload.svg"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     inkscape:document-units="px"
+     inkscape:zoom="1.0503157"
+     inkscape:cx="-237.54763"
+     inkscape:cy="49.984973"
+     inkscape:window-width="2190"
+     inkscape:window-height="1401"
+     inkscape:window-x="1463"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1" />
+  <defs
+     id="defs1" />
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-167.74583,-135.20208)">
+    <title
+       id="title1">file-download-outline</title>
+    <title
+       id="title1-6">file-upload-outline</title>
+    <path
+       d="m 170.92084,135.20208 1.905,1.905 v 3.81001 a 0.63500079,0.63500079 0 0 1 -0.635,0.63499 h -3.81001 a 0.63500079,0.63500079 0 0 1 -0.635,-0.63499 v -5.08002 a 0.63500079,0.63500079 0 0 1 0.635,-0.63499 h 2.54001 m 1.27,5.71501 v -3.49251 h -1.58751 v -1.58751 h -2.2225 v 5.08002 h 3.81001 m -1.905,-2.54001 1.26999,1.27 h -0.79375 v 0.9525 h -0.9525 v -0.9525 h -0.79374 z"
+       id="path1-2"
+       style="stroke-width:0.3175" />
+  </g>
+</svg>
diff --git a/static/images/icon_node_download.svg b/static/images/icon_node_download.svg
new file mode 100644
index 0000000..2484701
--- /dev/null
+++ b/static/images/icon_node_download.svg
@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="25.000025"
+   height="24"
+   viewBox="0 0 6.6145897 6.35"
+   version="1.1"
+   id="svg1"
+   inkscape:version="1.4.4 (dcaf3e7d9e, 2026-05-05)"
+   sodipodi:docname="file_note_download.svg"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     inkscape:document-units="px"
+     inkscape:zoom="11.313708"
+     inkscape:cx="20.152543"
+     inkscape:cy="26.825864"
+     inkscape:window-width="2190"
+     inkscape:window-height="1401"
+     inkscape:window-x="1463"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1" />
+  <defs
+     id="defs1" />
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-165.1,-169.33333)">
+    <title
+       id="title1">text-box-check-outline</title>
+    <path
+       d="m 168.55723,175.68333 h -2.75167 c -0.39159,0 -0.70556,-0.31397 -0.70556,-0.70555 v -4.93889 c 0,-0.39159 0.31397,-0.70556 0.70556,-0.70556 h 4.93888 c 0.39159,0 0.70556,0.31397 0.70556,0.70556 v 2.75167 c -0.2152,-0.12347 -0.45156,-0.21167 -0.70556,-0.254 v -2.49767 h -4.93888 v 4.93889 h 2.49767 c 0.0423,0.254 0.13053,0.49036 0.254,0.70555 m -0.28223,-1.41111 h -1.76389 v -0.70556 h 1.76389 m 0.94544,-0.70554 h -2.70933 v -0.70556 h 3.52778 v 0.381 c -0.29986,0.0493 -0.57502,0.16228 -0.81845,0.32456 m 0.81845,-1.41112 h -3.52778 v -0.70555 h 3.52778"
+       id="path1"
+       style="stroke-width:0.352777"
+       sodipodi:nodetypes="cssssssccccccccccccccccccccc" />
+    <path
+       d="m 170.19726,175.68333 1.26999,-1.27 h -0.79375 v -0.9525 h -0.9525 v 0.9525 h -0.79374 z"
+       style="stroke-width:0.3175"
+       id="path1-6" />
+  </g>
+</svg>
diff --git a/static/images/icon_node_upload.svg b/static/images/icon_node_upload.svg
new file mode 100644
index 0000000..b5d9e4d
--- /dev/null
+++ b/static/images/icon_node_upload.svg
@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="25.000025"
+   height="24"
+   viewBox="0 0 6.6145897 6.35"
+   version="1.1"
+   id="svg1"
+   inkscape:version="1.4.4 (dcaf3e7d9e, 2026-05-05)"
+   sodipodi:docname="file_note_upload.svg"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     inkscape:document-units="px"
+     inkscape:zoom="11.313708"
+     inkscape:cx="20.152543"
+     inkscape:cy="26.825864"
+     inkscape:window-width="2190"
+     inkscape:window-height="1401"
+     inkscape:window-x="1463"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1" />
+  <defs
+     id="defs1" />
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-165.1,-169.33333)">
+    <title
+       id="title1">text-box-check-outline</title>
+    <path
+       d="m 168.55723,175.68333 h -2.75167 c -0.39159,0 -0.70556,-0.31397 -0.70556,-0.70555 v -4.93889 c 0,-0.39159 0.31397,-0.70556 0.70556,-0.70556 h 4.93888 c 0.39159,0 0.70556,0.31397 0.70556,0.70556 v 2.75167 c -0.2152,-0.12347 -0.45156,-0.21167 -0.70556,-0.254 v -2.49767 h -4.93888 v 4.93889 h 2.49767 c 0.0423,0.254 0.13053,0.49036 0.254,0.70555 m -0.28223,-1.41111 h -1.76389 v -0.70556 h 1.76389 m 0.94544,-0.70554 h -2.70933 v -0.70556 h 3.52778 v 0.381 c -0.29986,0.0493 -0.57502,0.16228 -0.81845,0.32456 m 0.81845,-1.41112 h -3.52778 v -0.70555 h 3.52778"
+       id="path1"
+       style="stroke-width:0.352777"
+       sodipodi:nodetypes="cssssssccccccccccccccccccccc" />
+    <path
+       d="m 170.19726,173.46083 1.26999,1.27 h -0.79375 v 0.9525 h -0.9525 v -0.9525 h -0.79374 z"
+       style="stroke-width:0.3175"
+       id="path1-6" />
+  </g>
+</svg>
diff --git a/static/images/icon_sync_done.svg b/static/images/icon_sync_done.svg
new file mode 100644
index 0000000..670a30b
--- /dev/null
+++ b/static/images/icon_sync_done.svg
@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="19.480101"
+   height="15.999988"
+   viewBox="0 0 5.1541098 4.23333"
+   version="1.1"
+   id="svg1"
+   inkscape:version="1.4.4 (dcaf3e7d9e, 2026-05-05)"
+   sodipodi:docname="icon_sync_ok.svg"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     inkscape:document-units="px"
+     inkscape:zoom="1.0503157"
+     inkscape:cx="9.0448999"
+     inkscape:cy="7.1407105"
+     inkscape:window-width="2190"
+     inkscape:window-height="1401"
+     inkscape:window-x="1463"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1" />
+  <defs
+     id="defs1" />
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-102.60277,-146.54742)">
+    <title
+       id="title1">check-bold</title>
+    <path
+       d="m 104.29447,150.78075 -1.6917,-1.6917 0.77093,-0.77093 0.92077,0.92349 2.69147,-2.69419 0.77094,0.77093 z"
+       id="path1"
+       style="fill:#5aa02c;stroke-width:0.272415" />
+  </g>
+</svg>
diff --git a/static/service_worker.js b/static/service_worker.js
index 7cf268e..9a95627 100644
--- a/static/service_worker.js
+++ b/static/service_worker.js
@@ -14,18 +14,23 @@ const CACHED_ASSETS = [
 	'/images/{{ .VERSION }}/collapsed.svg',
 	'/images/{{ .VERSION }}/expanded.svg',
 	'/images/{{ .VERSION }}/icon_back.svg',
+	'/images/{{ .VERSION }}//icon_file_download.svg',
+	'/images/{{ .VERSION }}//icon_file_upload.svg',
 	'/images/{{ .VERSION }}/icon_history.svg',
 	'/images/{{ .VERSION }}/icon_home.svg',
 	'/images/{{ .VERSION }}/icon_markdown_hollow.svg',
 	'/images/{{ .VERSION }}/icon_markdown.svg',
 	'/images/{{ .VERSION }}/icon_menu.svg',
 	'/images/{{ .VERSION }}/icon_new_document.svg',
+	'/images/{{ .VERSION }}//icon_node_download.svg',
+	'/images/{{ .VERSION }}//icon_node_upload.svg',
 	'/images/{{ .VERSION }}/icon_refresh.svg',
 	'/images/{{ .VERSION }}/icon_save_disabled.svg',
 	'/images/{{ .VERSION }}/icon_save.svg',
 	'/images/{{ .VERSION }}/icon_search.svg',
 	'/images/{{ .VERSION }}/icon_settings.svg',
 	'/images/{{ .VERSION }}/icon_storage.svg',
+	'/images/{{ .VERSION }}//icon_sync_done.svg',
 	'/images/{{ .VERSION }}/icon_table.svg',
 	'/images/{{ .VERSION }}/icon_transfer.svg',
 	'/images/{{ .VERSION }}/leaf.svg',