Drop the extension, and give the test suite a front door

Phase 6, the last of the fresh-install spec.

159 scripts lose their .sh: 110 contracts, 47 Vicinae commands, 2 compositor
contracts. A shebang and the executable bit already select the interpreter. The
extension only ever added something that had to stay in sync, and the rename
proved the point twice over in the space of an hour.

The spec's stated risk was Vicinae's script discovery. One script was renamed and
reloaded on its own before the other 46 followed; it came back as
scripts:panama.capture and all 47 resolve. What the probe turned up instead is
that the extension was never only a filename: Vicinae's command IDs embed it, so
every ID changed. Nothing in this repository refers to them, so nothing breaks.
The only trace is Vicinae's metadata.json, whose visited map had two Panama
entries that are now orphaned -- two commands lost their usage ranking and will
earn it back. Worth knowing before anyone renames these again on a machine that
has a keybind pointing at one.

Rewriting the references by exact filename missed two things it structurally
could not see: a name built from a variable, settings-$page.sh, and a glob,
-name '*.sh'. Both were in the contract that counts the generated commands, which
promptly reported 47 expected and 0 found. The mechanical part of a rename is the
part that looks finished.

The three subcommands. panama doctor fronts a health check that already existed
and already ran at the end of every install but could not be reached from a
terminal. panama upgrade re-runs the installer from anywhere. panama test runs
the suite, which had no entry point at all -- 121 files that were the main safety
net in this repository and were invisible in it.

Writing that runner found three tests nothing was running.
calendar_agenda_bridge_test, home_assistant_bridge_test and kdeconnect_bridge_test
are unittest suites without the executable bit, so no contract invoked them and
the first draft of the runner skipped them silently. All three pass, and have
passed unobserved for weeks. The runner collects *_test.py as well now, because a
runner with a blind spot is worse than no runner for the same reason a dependency
checker with one is: it reports PASS.

Six worktrees pruned. Each was re-checked rather than trusted to the spec's list,
and two needed it: panama-commands is not on feat/panama-commands but on
feat/gnome-tweaks-parity, and fix/panama-displays-review reads [ahead 3] -- ahead
of its remote, not of main, with every commit patch-equivalent to landed work.
roadmap-completion stays; it has five commits that are genuinely unlanded. The
branches are left alone: pruning a worktree costs nothing, deleting a branch is a
decision.

121 contracts pass.

Claude-Session: https://claude.ai/code/session_01NvgBuSWB5sE43yWmg21ozj

tests/quickshell/settings-backup-live-contract

@@ -0,0 +1,178 @@
+#!/usr/bin/env bash
+
+# Behavioral coverage for the QML handoff after the helper commits a restore.
+# The harness has a unique shell identity, isolated XDG roots, and fake external
+# consumers. It records the real SettingsBackup call order without touching the
+# daily-driver shell, compositor, keymap, or wallpaper.
+
+set -euo pipefail
+
+repo_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
+service="$repo_dir/config/dot/quickshell/services/SettingsBackup.qml"
+harness="$repo_dir/config/dot/quickshell/settings-backup-harness.qml"
+work="$(mktemp -d /tmp/panama-settings-backup-live.XXXXXX)"
+
+fail() {
+    printf 'settings backup live contract: %s\n' "$1" >&2
+    exit 1
+}
+
+qs_test() {
+    XDG_CONFIG_HOME="$work/config" XDG_STATE_HOME="$work/state" qs -p "$harness" "$@"
+}
+
+cleanup() {
+    qs_test kill >/dev/null 2>&1 || true
+    rm -rf "$work"
+}
+trap cleanup EXIT
+
+# The production command boundary must remain argv-only.
+rg -Fq 'actionRun.exec([root.helperPath, "save", root.serializeHomeState()]);' "$service" \
+    || fail 'save does not pass live Home state as one argument'
+rg -Fq 'actionRun.exec([root.helperPath, "restore", name]);' "$service" \
+    || fail 'restore is not executed through an argument array'
+if rg -q 'bash.*-c|sh.*-c' "$service"; then
+    fail 'the restore service constructs a shell command'
+fi
+
+# The harness replaces these seams, while these mappings prove the production
+# defaults still delegate to Panama's existing public service APIs.
+for mapping in \
+    'HomePreferences.resetHomeDefaults();' \
+    'HomePreferences.initialize(ids);' \
+    'HomePreferences.setAlias(id, alias);' \
+    'DesktopPreferences.reload();' \
+    'DesktopPreferences.set("displays", value);' \
+    'Displays.currentLayout();' \
+    'Displays.applyProtectedLayout(layout);' \
+    'Displays.canConfirm;' \
+    'Displays.confirm();' \
+    'IdleLock.apply();' \
+    'Displays.externalChangeBlocked = blocked;' \
+    'SystemSettings.applyPersistedDisplayPolicy();' \
+    'Keybinds.applyReload();' \
+    'Wallpaper.applyCurrentPolicy(false);' \
+    'LockScreen.regenerate();' \
+    'Quickshell.reload(false);'; do
+    rg -Fq "$mapping" "$service" || fail "production restore seam is missing: $mapping"
+done
+
+qs_test --daemonize >"$work/quickshell.log" 2>&1
+ready=false
+for _ in $(seq 1 60); do
+    if qs_test ipc show 2>/dev/null | rg -q '^target settings-backup-behavior$'; then
+        ready=true
+        break
+    fi
+    sleep 0.1
+done
+if [[ "$ready" != true ]]; then
+    sed -n '1,200p' "$work/quickshell.log" >&2
+    fail 'isolated SettingsBackup harness did not start'
+fi
+
+qs_test ipc call settings-backup-behavior reset >/dev/null
+payload='{"restored":"settings-20260818-010203004.json","home":{"present":true,"data":{"initialized":true,"favorites":[{"id":"light.desk","alias":"Desk"},{"id":"light.office","alias":"Office"}]}}}'
+[[ "$(qs_test ipc call settings-backup-behavior apply "$payload")" == "true" ]] \
+    || fail 'valid restore output was rejected'
+
+status=""
+for _ in $(seq 1 50); do
+    status="$(qs_test ipc call settings-backup-behavior status)"
+    jq -e '.calls[-1] == "shell.reload"' <<<"$status" >/dev/null 2>&1 && break
+    sleep 0.1
+done
+jq -e '
+    .calls == [
+        "home.reset",
+        "home.initialize:light.desk,light.office",
+        "home.alias:light.desk=Desk",
+        "home.alias:light.office=Office",
+        "desktop.reload",
+        "display.apply:[{\"name\":\"DP-2\",\"width\":4500,\"height\":3000,\"refreshRate\":60,\"mode\":\"4500x3000@60\",\"scale\":1.5,\"transform\":0,\"x\":-2560,\"y\":0,\"primary\":false},{\"name\":\"HDMI-A-1\",\"width\":2560,\"height\":1440,\"refreshRate\":60,\"mode\":\"2560x1440@60\",\"scale\":1,\"transform\":0,\"x\":0,\"y\":0,\"primary\":true}]",
+        "display.confirm",
+        "idle.apply",
+        "lock.regenerate",
+        "wallpaper.apply-policy",
+        "keybinds.reload",
+        "system.apply",
+        "display.block:false",
+        "shell.reload"
+    ]
+    and .initialized == true
+    and .favorites == [
+        {"id":"light.desk","alias":"Desk"},
+        {"id":"light.office","alias":"Office"}
+    ]
+' <<<"$status" >/dev/null || fail "restore handoff order/state was wrong: $status"
+
+# Invalid output is rejected before Home state or external consumers change.
+qs_test ipc call settings-backup-behavior reset >/dev/null
+invalid='{"home":{"present":true,"data":{"initialized":true,"favorites":[{"id":"light.desk","alias":"One"},{"id":"light.desk","alias":"Two"}]}}}'
+[[ "$(qs_test ipc call settings-backup-behavior apply "$invalid")" == "false" ]] \
+    || fail 'duplicate Home state was accepted'
+status="$(qs_test ipc call settings-backup-behavior status)"
+jq -e '.calls == [] and .initialized == false and .favorites == []' <<<"$status" >/dev/null \
+    || fail 'invalid restore output caused partial live mutations'
+
+# An absent Home generation uses the same ordered external handoff but leaves
+# the live Home service reset rather than manufacturing an initialized store.
+qs_test ipc call settings-backup-behavior reset >/dev/null
+absent='{"restored":"settings-20260818-010203005.json","home":{"present":false}}'
+[[ "$(qs_test ipc call settings-backup-behavior apply "$absent")" == "true" ]] \
+    || fail 'absent Home restore output was rejected'
+for _ in $(seq 1 50); do
+    status="$(qs_test ipc call settings-backup-behavior status)"
+    jq -e '.calls[-1] == "shell.reload"' <<<"$status" >/dev/null 2>&1 && break
+    sleep 0.1
+done
+jq -e '
+    .calls == [
+        "home.reset",
+        "desktop.reload",
+        "display.apply:[{\"name\":\"DP-2\",\"width\":4500,\"height\":3000,\"refreshRate\":60,\"mode\":\"4500x3000@60\",\"scale\":1.5,\"transform\":0,\"x\":-2560,\"y\":0,\"primary\":false},{\"name\":\"HDMI-A-1\",\"width\":2560,\"height\":1440,\"refreshRate\":60,\"mode\":\"2560x1440@60\",\"scale\":1,\"transform\":0,\"x\":0,\"y\":0,\"primary\":true}]",
+        "display.confirm",
+        "idle.apply",
+        "lock.regenerate",
+        "wallpaper.apply-policy",
+        "keybinds.reload",
+        "system.apply",
+        "display.block:false",
+        "shell.reload"
+    ]
+    and .initialized == false
+    and .favorites == []
+' <<<"$status" >/dev/null || fail "absent Home handoff was wrong: $status"
+
+# If the restored complete layout is rejected before it can be verified, the
+# original persisted layout is put back and the shell is not reloaded over an
+# unproven display state.
+qs_test ipc call settings-backup-behavior reset >/dev/null
+[[ "$(qs_test ipc call settings-backup-behavior applyDisplayFailure "$payload")" == "false" ]] \
+    || fail 'a rejected restored display layout was reported as successful'
+status="$(qs_test ipc call settings-backup-behavior status)"
+jq -e '.calls == [
+    "home.reset",
+    "home.initialize:light.desk,light.office",
+    "home.alias:light.desk=Desk",
+    "home.alias:light.office=Office",
+    "desktop.reload",
+    "display.apply:[{\"name\":\"DP-2\",\"width\":4500,\"height\":3000,\"refreshRate\":60,\"mode\":\"4500x3000@60\",\"scale\":1.5,\"transform\":0,\"x\":-2560,\"y\":0,\"primary\":false},{\"name\":\"HDMI-A-1\",\"width\":2560,\"height\":1440,\"refreshRate\":60,\"mode\":\"2560x1440@60\",\"scale\":1,\"transform\":0,\"x\":0,\"y\":0,\"primary\":true}]",
+    "display.protect:{\"DP-2\":{\"mode\":\"4500x3000@60\",\"scale\":1.5,\"transform\":0,\"x\":0,\"y\":0,\"primary\":true},\"HDMI-A-1\":{\"mode\":\"2560x1440@60\",\"scale\":1,\"transform\":0,\"x\":3000,\"y\":0,\"primary\":false}}",
+    "display.block:false"
+] and (.lastError | contains("display layout"))' <<<"$status" >/dev/null \
+    || fail "rejected display restore did not retain the original layout: $status"
+
+# Restore refuses before launching the helper while a display apply/recovery is
+# active, so no snapshot can race the confirmation boundary.
+qs_test ipc call settings-backup-behavior reset >/dev/null
+[[ "$(qs_test ipc call settings-backup-behavior restoreWhileDisplayBusy)" == "false" ]] \
+    || fail 'snapshot restore started during an active display operation'
+status="$(qs_test ipc call settings-backup-behavior status)"
+jq -e '.calls == [] and (.lastError | contains("display change"))' <<<"$status" >/dev/null \
+    || fail "display-busy restore refusal was not clean: $status"
+
+trap - EXIT
+cleanup
+printf 'settings backup live contract: PASS\n'