feat: minimize and restore windows the way a desktop does

The scratchpad technically minimized Chrome, but sway hands scratchpad
windows back floating, so restoring gave a draggable window instead of
the maximized one the user put away. Park windows on a hidden workspace
as ordinary tiled containers instead, and move them back to the visible
workspace on restore.

classroom-window carries the whole state machine, so the dock buttons
and Super+M share one implementation:

  not running  -> launch
  unfocused    -> focus
  focused      -> minimize
  minimized    -> restore, tiled and maximized

Fullscreen is dropped on the way out, since a container parked while
still fullscreen keeps drawing over everything else. floating disable on
the way back also rescues windows left floating by the old scratchpad
path.

Super+Shift+M restores the newest minimized window, so nothing can get
stranded on the hidden workspace.

Co-Authored-By: Claude Opus 5 <[email protected]>

scripts/classroom-browser

@@ -1,44 +1,25 @@
 #!/bin/bash
-set -e
+set -euo pipefail
 
-APP_ID='google-chrome'
-HIDDEN_WS='__ekklesia_hidden'
+# The dock's Browser button. classroom-window decides whether this is a
+# launch, a focus, a minimise or a restore.
+#
+# Chrome stays a full browser: Wonder Ink is only the starting page, and
+# the profile in ~/.config/google-chrome is never touched here so logins
+# and cookies survive reboots and updates.
 
-if ! pgrep -x chrome >/dev/null 2>&1 &&
-   ! pgrep -x google-chrome >/dev/null 2>&1; then
-    exec google-chrome \
+HOME_PAGE='https://app.wonderink.org/'
+
+exec /usr/local/bin/classroom-window toggle \
+    --match 'google-chrome' \
+    --match 'chrome' \
+    --match 'chrome-.*' \
+    --match 'google-chrome-.*' \
+    -- \
+    google-chrome \
         --ozone-platform=wayland \
         --start-maximized \
-        https://app.wonderink.org/
-fi
-
-focused_app="$(
-    swaymsg -t get_tree -r |
-    python3 -c '
-import json, sys
-
-tree = json.load(sys.stdin)
-
-def find_focused(node):
-    if node.get("focused"):
-        return node
-    for child in node.get("nodes", []) + node.get("floating_nodes", []):
-        result = find_focused(child)
-        if result:
-            return result
-    return None
-
-node = find_focused(tree)
-print((node or {}).get("app_id") or "")
-'
-)"
-
-if [ "$focused_app" = "$APP_ID" ]; then
-    swaymsg '[app_id="google-chrome"] move container to workspace __ekklesia_hidden' >/dev/null
-    exit 0
-fi
-
-swaymsg '[app_id="google-chrome"] move container to workspace current' >/dev/null 2>&1 || true
-swaymsg '[app_id="google-chrome"] focus' >/dev/null 2>&1 || true
-swaymsg '[app_id="google-chrome"] fullscreen disable' >/dev/null 2>&1 || true
-swaymsg '[app_id="google-chrome"] floating disable' >/dev/null 2>&1 || true
+        --no-first-run \
+        --no-default-browser-check \
+        --password-store=basic \
+        "$HOME_PAGE"