diff --git a/config/icons/ekklesia-parent-call.svg b/config/icons/ekklesia-parent-call.svg
new file mode 100644
index 0000000..5c476e6
--- /dev/null
+++ b/config/icons/ekklesia-parent-call.svg
@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 22 22" width="22" height="22">
+  <!-- The comment lives inside <svg>, not above it. gdk-pixbuf
+       recognises an SVG by sniffing the first bytes of the file, and a
+       licence-length comment before the opening tag pushes it out of
+       that window: every GTK program then reports "couldn't recognize
+       the image file format" while Qt renders it happily. Measured on
+       both of the classroom's own icons. -->
+  <!-- Parent Call.
+  
+       Drawn in Breeze's own language rather than picked from it, because
+       Breeze has no icon that means "fetch this child's grown-up". It has
+       people, and it has telephones, and the two never meet. A bare handset
+       was tried first and read as a telephone feature; a bell was tried
+       before that and read as Plasma's notifications, which sit in the same
+       bar.
+  
+       So: an adult and a child, and one small speech bubble. Same 22-unit
+       grid, same single path style, same ColorScheme-Text class, so it
+       recolours with the session exactly as a Breeze icon does and follows
+       the light and dark themes without a second file. -->
+  <defs>
+    <style type="text/css">.ColorScheme-Text { color: #fcfcfc; }</style>
+  </defs>
+  <g class="ColorScheme-Text" style="fill:currentColor;fill-opacity:1;stroke:none">
+    <!-- One small speech bubble, top right, clear of both heads: somebody
+         is being asked for. It is the only round thing up there, so it
+         cannot be counted as a third person. -->
+    <path d="M16.6 1.2c-2.4 0-4.4 1.3-4.4 3s2 3 4.4 3c.3 0 .6 0 .9-.1l2.3 1.2-.5-1.7c1-.5 1.6-1.4
+             1.6-2.4 0-1.7-2-3-4.3-3z"/>
+    <!-- The adult: taller, at the back, on the left. -->
+    <circle cx="6.6" cy="8.2" r="3.1"/>
+    <path d="M6.6 12.3c-2.9 0-5.1 2.1-5.1 4.9V19h10.2v-1.8c0-2.8-2.2-4.9-5.1-4.9z"/>
+    <!-- The child: smaller, in front, on the right. -->
+    <circle cx="14.6" cy="12.4" r="2.2"/>
+    <path d="M14.6 15.3c-2.1 0-3.6 1.5-3.6 3.3V19h7.2v-.4c0-1.8-1.5-3.3-3.6-3.3z"/>
+  </g>
+</svg>
diff --git a/config/icons/ekklesia-wonderink.svg b/config/icons/ekklesia-wonderink.svg
index eef7aa1..27b5e40 100644
--- a/config/icons/ekklesia-wonderink.svg
+++ b/config/icons/ekklesia-wonderink.svg
@@ -1,13 +1,19 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- Wonder Ink.
-
-     A stand-in for the product's own mark, which the classroom does not
-     have a licensed asset for. It is a filled colour tile rather than a
-     line drawing on purpose: the room already learned, the hard way, that
-     a monochrome glyph on a bar is read as a decoration and not as an
-     application. Somebody asked whether the old browser glyph meant "the
-     Internet". A tile with its own colour does not get that question. -->
 <svg xmlns="http://www.w3.org/2000/svg" width="128" height="128" viewBox="0 0 128 128">
+  <!-- The comment lives inside <svg>, not above it. gdk-pixbuf
+       recognises an SVG by sniffing the first bytes of the file, and a
+       licence-length comment before the opening tag pushes it out of
+       that window: every GTK program then reports "couldn't recognize
+       the image file format" while Qt renders it happily. Measured on
+       both of the classroom's own icons. -->
+  <!-- Wonder Ink.
+  
+       A stand-in for the product's own mark, which the classroom does not
+       have a licensed asset for. It is a filled colour tile rather than a
+       line drawing on purpose: the room already learned, the hard way, that
+       a monochrome glyph on a bar is read as a decoration and not as an
+       application. Somebody asked whether the old browser glyph meant "the
+       Internet". A tile with its own colour does not get that question. -->
   <defs>
     <linearGradient id="tile" x1="0" y1="0" x2="1" y2="1">
       <stop offset="0" stop-color="#4FB3A8"/>
diff --git a/config/plasma/applications/ekklesia-parent-call.desktop b/config/plasma/applications/ekklesia-parent-call.desktop
index ded3305..fe5ff12 100644
--- a/config/plasma/applications/ekklesia-parent-call.desktop
+++ b/config/plasma/applications/ekklesia-parent-call.desktop
@@ -2,16 +2,15 @@
 Type=Application
 Name=Parent Call
 Comment=Ask the sanctuary to call a child's parent to this room
-# Breeze's own, and deliberately not a bell.
-#
-# The previous mark was a bell, which sat two inches from Plasma's
-# notification bell in the same bar and meant something entirely
-# different. A handset with an outgoing arrow cannot be mistaken for an
-# alert: it reads as placing a call, and the arrow says the call leaves
-# this room. No stock Breeze icon combines a person with a call, so the
-# unambiguous half was chosen over the half that could be read as user
-# settings — which is what two grey people on a panel look like.
-Icon=call-outgoing
+# Drawn for this, in Breeze's language, because Breeze has no icon that
+# means "fetch this child's grown-up". Two marks were tried and rejected
+# on a real panel first: a bell, which sat inches from Plasma's own
+# notification bell in the same bar, and a handset with an outgoing
+# arrow, which read as a telephone feature. This one is an adult, a
+# child, and one small speech bubble. It uses Breeze's ColorScheme-Text
+# class, so it recolours with the session and needs no second file for
+# the light theme.
+Icon=ekklesia-parent-call
 Exec=/usr/local/bin/classroom-parent-call
 Terminal=false
 Categories=Utility;
diff --git a/config/plasma/lookandfeel/contents/layouts/org.kde.plasma.desktop-layout.js b/config/plasma/lookandfeel/contents/layouts/org.kde.plasma.desktop-layout.js
index 83f3f5c..4bb96d6 100644
--- a/config/plasma/lookandfeel/contents/layouts/org.kde.plasma.desktop-layout.js
+++ b/config/plasma/lookandfeel/contents/layouts/org.kde.plasma.desktop-layout.js
@@ -41,29 +41,29 @@ panel.opacity = "adaptive";
 
 // LEFT — auxiliary. Parent Call is not one of the room's applications and
 // is deliberately not in the row with them.
-// A task manager holding one launcher, not the Icon widget.
+// Quick Launch: a launcher, and only a launcher.
 //
-// The Icon widget copies the desktop entry into the user's home and uses
-// the copy, so a classroom that had already run would keep the old icon
-// and the old command for ever — an update could never change either.
-// Measured: it kept showing a bell out of a package that no longer
-// contains one. Quick Launch would also do, but Debian does not ship it.
+// Two other widgets were tried on a real panel. The Icon widget copies
+// the desktop entry into the user's home and uses the copy, so an update
+// could never change the icon or the command — it kept showing a bell out
+// of a package that no longer contained one. A task manager reads
+// /usr/share/applications live, which fixes that, but a task manager also
+// shows every running window, so the auxiliary corner filled up with the
+// lesson's tasks.
 //
-// This applet reads /usr/share/applications live, which is what an OTA
-// update writes to, and it costs nothing extra: the classroom already
-// runs one for the applications.
-var parentCall = panel.addWidget("org.kde.plasma.icontasks");
+// Quick Launch reads the entry live and shows nothing but the button.
+var parentCall = panel.addWidget("org.kde.plasma.quicklaunch");
 parentCall.currentConfigGroup = ["General"];
-parentCall.writeConfig("launchers", "applications:ekklesia-parent-call.desktop");
-parentCall.writeConfig("groupingStrategy", 0);
-parentCall.writeConfig("showOnlyCurrentDesktop", false);
-parentCall.writeConfig("showOnlyCurrentActivity", false);
-parentCall.writeConfig("showOnlyCurrentScreen", false);
-parentCall.writeConfig("minimizeActiveTaskOnClick", false);
-parentCall.writeConfig("fill", false);
-parentCall.writeConfig("maxStripes", 1);
-parentCall.writeConfig("wheelEnabled", false);
-parentCall.writeConfig("showToolTips", true);
+// A file URL, not applications:. Quick Launch resolves the entry itself
+// and does not copy it, so the path is a live reference to what the
+// package installs.
+parentCall.writeConfig(
+    "launcherUrls",
+    "file:///usr/share/applications/ekklesia-parent-call.desktop"
+);
+parentCall.writeConfig("showLauncherNames", false);
+parentCall.writeConfig("enablePopup", false);
+parentCall.writeConfig("maxSectionCount", 1);
 
 var leftGap = panel.addWidget("org.kde.plasma.panelspacer");
 leftGap.currentConfigGroup = ["General"];
diff --git a/docs/screenshots/icon-candidates-2.png b/docs/screenshots/icon-candidates-2.png
index 6d417c4..af03442 100644
Binary files a/docs/screenshots/icon-candidates-2.png and b/docs/screenshots/icon-candidates-2.png differ
diff --git a/docs/screenshots/pc-icon-vs-notifications.png b/docs/screenshots/pc-icon-vs-notifications.png
index 0fa4fde..386bf6c 100644
Binary files a/docs/screenshots/pc-icon-vs-notifications.png and b/docs/screenshots/pc-icon-vs-notifications.png differ
diff --git a/docs/screenshots/pc-mark.png b/docs/screenshots/pc-mark.png
new file mode 100644
index 0000000..7b943f6
Binary files /dev/null and b/docs/screenshots/pc-mark.png differ
diff --git a/docs/screenshots/pc-panel-left.png b/docs/screenshots/pc-panel-left.png
index 3073571..5851a2a 100644
Binary files a/docs/screenshots/pc-panel-left.png and b/docs/screenshots/pc-panel-left.png differ
diff --git a/docs/screenshots/pc-panel.png b/docs/screenshots/pc-panel.png
index eac1798..703440a 100644
Binary files a/docs/screenshots/pc-panel.png and b/docs/screenshots/pc-panel.png differ
diff --git a/docs/screenshots/pc-ready.png b/docs/screenshots/pc-ready.png
index cfbee71..42e66e4 100644
Binary files a/docs/screenshots/pc-ready.png and b/docs/screenshots/pc-ready.png differ
diff --git a/docs/screenshots/pc-sent.png b/docs/screenshots/pc-sent.png
index 3bbc46a..54ea5b1 100644
Binary files a/docs/screenshots/pc-sent.png and b/docs/screenshots/pc-sent.png differ
diff --git a/packaging/debian/control.template b/packaging/debian/control.template
index 6e15b78..98d7bc0 100644
--- a/packaging/debian/control.template
+++ b/packaging/debian/control.template
@@ -4,7 +4,7 @@ Section: misc
 Priority: optional
 Architecture: amd64
 Maintainer: Ekklesia
-Depends: plasma-desktop, plasma-workspace, kwin-wayland, plasma-nm, plasma-pa, sddm, dbus-user-session, xwayland, fonts-dejavu, fonts-noto, network-manager, pipewire, pipewire-audio, wireplumber, pulseaudio-utils, cups, cups-client, cups-filters, foomatic-db-compressed-ppds, python3-gi, python3-gi-cairo, gir1.2-gtk-3.0, gir1.2-gtklayershell-0.1, libnotify-bin, curl, gnupg, ca-certificates, python3-paho-mqtt
+Depends: plasma-desktop, plasma-workspace, kwin-wayland, plasma-nm, plasma-pa, plasma-widgets-addons, sddm, dbus-user-session, xwayland, fonts-dejavu, fonts-noto, network-manager, pipewire, pipewire-audio, wireplumber, pulseaudio-utils, cups, cups-client, cups-filters, foomatic-db-compressed-ppds, python3-gi, python3-gi-cairo, gir1.2-gtk-3.0, gir1.2-gtklayershell-0.1, libnotify-bin, curl, gnupg, ca-certificates, python3-paho-mqtt
 Recommends: vlc
 Conflicts: plasma-welcome, plasma-discover, kdeconnect, kup-backup
 Description: Ekklesia managed classroom environment
@@ -14,6 +14,11 @@ Description: Ekklesia managed classroom environment
  left here is the church's own subject matter — Wonder Ink, the browser,
  the DVD player, the printer, the audio policy and the updater.
  .
+ plasma-widgets-addons is here for one widget: Quick Launch, which is
+ the only stock way to put a single launcher on the panel that reads
+ /usr/share/applications live. The Icon widget copies the entry into the
+ user's home, so an update could never change it.
+ .
  python3-gi and gtk-layer-shell are still here because the DVD player
  draws its own loading cover and control bar as layer-shell surfaces.
  They are no longer here for a dock.
diff --git a/tools/lab/Dockerfile.plasma b/tools/lab/Dockerfile.plasma
index 9306ff4..a74523c 100644
--- a/tools/lab/Dockerfile.plasma
+++ b/tools/lab/Dockerfile.plasma
@@ -88,3 +88,7 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get purge -y \
       plasma-discover-backend-fwupd kdeconnect kup-backup \
  && apt-get autoremove -y \
  && rm -rf /var/lib/apt/lists/*
+
+# Quick Launch, for the one auxiliary button on the panel.
+RUN apt-get update && apt-get install -y --no-install-recommends plasma-widgets-addons \
+ && rm -rf /var/lib/apt/lists/*
diff --git a/tools/lab/parent-call-rig b/tools/lab/parent-call-rig
index b1b0cb2..4d8f11d 100755
--- a/tools/lab/parent-call-rig
+++ b/tools/lab/parent-call-rig
@@ -97,7 +97,9 @@ ENV
     sleep 4
 
     # The room points at the loopback broker, never at the church's.
-    inlab python3 - <<'PY'
+    # docker exec needs -i or the heredoc reaches nothing at all, which is
+    # how this silently left the room pointing nowhere.
+    docker exec -i "$NAME" python3 - <<'PY'
 import pathlib
 p = pathlib.Path("/etc/ekklesia-classroom/device.conf")
 t = p.read_text()