Make the weather location and graphics device choosable

The last two values that could only be changed by editing a file.

Weather was pinned to hardcoded coordinates, so the card could not be
pointed anywhere else. It is a location search now, not latitude and
longitude fields: nobody knows their own coordinates, and a control that
demands them is one nobody uses. Open-Meteo's geocoding endpoint needs
no key, the same reason the forecast already uses them. Only the search
term leaves the machine -- the stored place name is a label -- and
coordinates are rounded to four decimals, far finer than a weather
reading resolves and coarse enough to keep a precise home location out
of the settings file.

The graphics readout was hardcoded to card1. This machine has two amdgpu
cards, discrete and integrated, so that was right only by luck, and the
path is meaningless on any other machine. GPUs are enumerated with a
readable name from lspci, since sysfs exposes only numeric ids, and the
picker appears only when there is more than one to choose between. A
stored path the machine does not have is refused and reported rather
than silently measuring nothing.

Also merges the per-application notification rules UI. Its three commits
were believed integrated but the page half was not actually in the tree:
main had the service side in Notifs.qml and zero references to
setAppRule in NotificationsPage. Ancestry is not content.

Claude-Session: https://claude.ai/code/session_01BRvzt4H8XXLPVH5MyYdk9L

config/dot/quickshell/scripts/panama-gpus

@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+
+# Enumerates GPUs that can report utilisation, with a readable name for each.
+#
+# Panama's vitals readout needs one specific sysfs file, and the card numbering
+# is neither stable across machines nor meaningful to a person: this box has
+# card1 and card2, both amdgpu, one discrete and one integrated. Picking a
+# number blindly shows whichever the kernel happened to enumerate first.
+#
+# Names come from lspci where available, because the sysfs device directory
+# exposes only numeric vendor/device ids.
+
+set -euo pipefail
+
+first=true
+printf '['
+
+for busy in /sys/class/drm/card*/device/gpu_busy_percent; do
+    [[ -r "$busy" ]] || continue
+
+    device_dir="$(dirname "$busy")"
+    card="$(basename "$(dirname "$device_dir")")"
+
+    # The device directory is a symlink into the PCI tree; its target's basename
+    # is the PCI address lspci wants.
+    pci="$(basename "$(readlink -f "$device_dir")" 2>/dev/null || true)"
+    name=""
+    if [[ -n "$pci" ]] && command -v lspci >/dev/null 2>&1; then
+        # Strip the leading domain: lspci -s wants 00:02.0, sysfs gives 0000:00:02.0
+        short="${pci#*:}"
+        name="$(lspci -s "$short" 2>/dev/null | sed -E 's/^[^ ]+ [^:]+: //' | head -1)"
+    fi
+    if [[ -z "$name" ]]; then
+        driver="$(sed -n 's/^DRIVER=//p' "$device_dir/uevent" 2>/dev/null | head -1)"
+        name="${driver:-Graphics} ($card)"
+    fi
+
+    reading="$(cat "$busy" 2>/dev/null || printf '')"
+    [[ "$reading" =~ ^[0-9]+$ ]] || reading=-1
+
+    [[ "$first" == true ]] || printf ','
+    first=false
+    printf '{"card":"%s","path":"%s","name":%s,"busy":%s}' \
+        "$card" "$busy" "$(printf '%s' "$name" | jq -Rs .)" "$reading"
+done
+
+printf ']\n'