Search from the launcher, and give the touchpad something to do

Four things a Hyprland desktop can do that this one was not.

Searching from the launcher needed no launcher work at all: Vicinae already
models it, so this is a script command with one percent-encoded argument. Make
it the fallback command and anything typed that matches nothing else offers to
search it. Bangs come free -- they are a property of where the query is sent,
not of the launcher -- so !yt reaches YouTube without a line of bang parsing.

Suggestions could not be a script command. They need a view that reacts as you
type, which is an extension: TypeScript, compiled, querying the same endpoint
Firefox's address bar uses. It debounces, and aborts the request in flight on
every keystroke -- typing is faster than the network, and an older answer
landing after a newer one leaves the list describing a query that is no longer
on screen. A bang skips suggestions entirely, because Google has no useful
guesses about "!yt".

The engine is now written down twice, once in each. The contract pins that they
agree, since searching from the fallback and searching from the suggestions
reaching different places is the kind of wrong that looks fine.

Gestures mirror GNOME: three fingers sideways for workspaces, up for the
overview, down to dismiss it. Open and close rather than toggle both ways --
toggling means swiping up from an open overview closes it, which is not what the
fingers meant. Hyprland reads gesture registrations at startup so they cannot be
a setting, but distance and direction can be, and are.

Window swallowing is off by default and a preference like every other misc
setting here. A terminal that vanishes when you did not ask for it is confusing
rather than broken, which is worse.

Claude-Session: https://claude.ai/code/session_01Q84axqUE5inJhf5Jz9CFy1

tests/hypr/gestures-contract

@@ -0,0 +1,88 @@
+#!/usr/bin/env bash
+
+# The touchpad gestures, and the window swallowing beside them.
+#
+# Both are behaviour that only exists on hardware this machine may not have, so
+# neither can be checked by running it. What can be pinned is the shape:
+#
+#   * Three gestures, mirroring GNOME. Sideways moves workspaces, up opens the
+#     overview, down closes it.
+#   * Up and down do not both toggle. That is the obvious way to write it and it
+#     is wrong: swiping up from an open overview would close it, and swiping
+#     down would reopen it, which is the opposite of what the fingers mean.
+#   * Swallowing is off by default and driven by a preference. Turning it on for
+#     everybody would make terminals appear to vanish on a machine nobody asked.
+#   * The swallow regex names only terminals this desktop ships. Anything the
+#     pattern matches can swallow, so a broad pattern is windows disappearing in
+#     cases nobody intended.
+
+set -uo pipefail
+
+repo_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
+input="$repo_dir/config/dot/hypr/input.lua"
+looks="$repo_dir/config/dot/hypr/looks.lua"
+schema="$repo_dir/config/dot/quickshell/config/PreferenceSchema.qml"
+
+findings=()
+note() { findings+=("$1"); }
+
+# ── Gestures ─────────────────────────────────────────────────────────────────
+
+gestures="$(grep -c 'hl\.gesture({' "$input" || true)"
+(( gestures == 3 )) || note "input.lua registers $gestures gestures, not the 3 that mirror GNOME"
+
+grep -qE 'fingers = 3, direction = "horizontal",[[:space:]]*action = "workspace"' "$input" \
+    || note 'three fingers sideways does not switch workspaces'
+grep -qE 'fingers = 3, direction = "up",[[:space:]]*action = overview\("open"\)' "$input" \
+    || note 'three fingers up does not open the overview'
+grep -qE 'fingers = 3, direction = "down",[[:space:]]*action = overview\("close"\)' "$input" \
+    || note 'three fingers down does not close the overview'
+
+# The specific mistake worth a test of its own.
+if grep -qE 'direction = "(up|down)",[[:space:]]*action = overview\("toggle"\)' "$input"; then
+    note 'a vertical gesture toggles the overview, so swiping the same way twice undoes itself'
+fi
+
+# The tuning that Hyprland does accept at runtime has to be reachable, or the
+# gestures are unadjustable without editing this file -- which is the thing
+# Settings exists to avoid.
+for key in swipeDistance swipeInvert; do
+    grep -q "key: \"$key\"" "$schema" \
+        || note "$key is not a preference, so the gestures cannot be tuned from Settings"
+done
+
+# ── Swallowing ───────────────────────────────────────────────────────────────
+
+grep -qE 'enable_swallow = prefs\.get\("windowSwallow", false\)' "$looks" \
+    || note 'window swallowing is not preference-driven and off by default'
+
+regex_line="$(grep -E '^\s*swallow_regex' "$looks" || true)"
+[[ -n "$regex_line" ]] || note 'swallowing is enabled with no regex, so nothing can ever swallow'
+
+# Anchored at both ends: an unanchored pattern matches any class containing the
+# name, which is a much larger set than the one intended.
+grep -qE 'swallow_regex\s*=\s*"\^\(.*\)\$"' "$looks" \
+    || note 'the swallow regex is not anchored, so it matches more window classes than it names'
+
+for terminal in kitty ghostty; do
+    grep -q "$terminal" <<<"$regex_line" \
+        || note "the swallow regex does not cover $terminal, which this desktop ships"
+done
+
+# Whatever the regex names has to be something the machine will actually have.
+declared="$(cat "$repo_dir"/setup/packages/* 2>/dev/null | sed 's/#.*//' | tr -d ' ' | grep -v '^$')"
+for terminal in kitty ghostty; do
+    grep -qix "$terminal" <<<"$declared" \
+        || note "the swallow regex names $terminal, which no package list installs"
+done
+
+# ── Report ───────────────────────────────────────────────────────────────────
+
+if (( ${#findings[@]} > 0 )); then
+    mapfile -t findings < <(printf '%s\n' "${findings[@]}" | sort -u)
+    printf 'gestures contract: %d finding(s)\n' "${#findings[@]}" >&2
+    printf '  - %s\n' "${findings[@]}" >&2
+    exit 1
+fi
+
+printf 'gestures contract: PASS\n'