Build the Panama Hyprland desktop

config/dot/xdg-desktop-portal/hyprland-portals.conf

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+# ─────────────────────────────────────────────────────────────────────────────
+# Portal backend routing for the Hyprland session
+#
+# This overrides /usr/share/xdg-desktop-portal/hyprland-portals.conf, which
+# ships `default=hyprland;gtk` and no Secret mapping.
+#
+# Why each line:
+#   hyprland  -> Screenshot, ScreenCast, GlobalShortcuts, InputCapture
+#                (this is what makes OBS / Sunshine / Zoom screen sharing work)
+#   gtk       -> FileChooser, Settings, Notification, Print, Access
+#                Settings is load-bearing: xdg-desktop-portal-gtk reads
+#                gsettings' org.gnome.desktop.interface and serves
+#                org.freedesktop.appearance, which is how libadwaita apps know
+#                to be dark.
+#   Secret    -> gnome-keyring. Its own portal file is UseIn=gnome, so under
+#                XDG_CURRENT_DESKTOP=Hyprland nothing would claim Secret and
+#                Flatpak apps needing credential storage would fail.
+#
+# xdg-desktop-portal-gnome stays installed but is inert here (its portal file
+# is UseIn=gnome); it is still needed for the GNOME session.
+# ─────────────────────────────────────────────────────────────────────────────
+
+[preferred]
+default=hyprland;gtk
+org.freedesktop.impl.portal.Screenshot=hyprland
+org.freedesktop.impl.portal.ScreenCast=hyprland
+org.freedesktop.impl.portal.Secret=gnome-keyring