Give each default-application role a whole family of types

Every role carried a single representative type, so setting "Images"
changed image/png and left image/jpeg wherever it landed. That is how
this desktop ended up opening PDFs in GIMP, PNGs in a pixel-art editor
and MP3s in a video transcoder: nobody chose any of it, applications
registered themselves for everything they could read, and the roles
governed one type each.

Roles now own families and write every type when set, the settings page
exposes the documents, text and archives roles it never offered, and a
new seed command curates a fresh machine during setup while always
keeping a choice the user has already made.

The shipped editor entry launches kitty explicitly. The stock
nvim.desktop sets Terminal=true, which defers to whatever the system
considers default rather than the terminal this desktop themes.

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

tests/quickshell/default-apps-contract.sh

@@ -65,6 +65,9 @@ write_application org.gnome.Ptyxis.desktop Ptyxis Terminal 'System;TerminalEmula
 write_application org.gnome.Rhythmbox3.desktop Rhythmbox 'Music Player' 'AudioVideo;Audio;Player;'
 write_application org.gnome.Loupe.desktop Loupe 'Image Viewer' 'Graphics;Viewer;'
 write_application org.gnome.Totem.desktop Videos 'Video Player' 'AudioVideo;Video;Player;'
+write_application org.gnome.Papers.desktop Papers 'Document Viewer' 'Office;Viewer;'
+write_application panama-nvim.desktop Neovim 'Text Editor' 'Utility;TextEditor;'
+write_application org.gnome.FileRoller.desktop 'Archive Manager' 'Archive Manager' 'Utility;Archiving;'
 
 cat >"$config_home/autostart/nextcloud.desktop" <<'EOF'
 [Desktop Entry]
@@ -108,6 +111,9 @@ if [[ "$1" == "query" && "$2" == "default" ]]; then
         audio/mpeg) printf '%s\n' 'org.gnome.Rhythmbox3.desktop' ;;
         image/png) printf '%s\n' 'org.gnome.Loupe.desktop' ;;
         video/mp4) printf '%s\n' 'org.gnome.Totem.desktop' ;;
+        application/pdf) printf '%s\n' 'org.gnome.Papers.desktop' ;;
+        text/plain) printf '%s\n' 'panama-nvim.desktop' ;;
+        application/zip) printf '%s\n' 'org.gnome.FileRoller.desktop' ;;
         *) exit 91 ;;
     esac
     exit 0
@@ -125,7 +131,7 @@ export PATH="$fake_bin:$PATH"
 snapshot="$($helper snapshot)" || fail 'snapshot command failed'
 [[ "$(rg --count '^get$' "$call_log")" == "1" ]] \
     || fail 'browser handler was queried more than once'
-[[ "$(rg --count '^query$' "$call_log")" == "6" ]] \
+[[ "$(rg --count '^query$' "$call_log")" == "9" ]] \
     || fail 'MIME handlers were queried more than once'
 jq -e '
     .handlers == {
@@ -135,7 +141,10 @@ jq -e '
         terminal: "org.gnome.Ptyxis.desktop",
         music: "org.gnome.Rhythmbox3.desktop",
         images: "org.gnome.Loupe.desktop",
-        video: "org.gnome.Totem.desktop"
+        video: "org.gnome.Totem.desktop",
+        documents: "org.gnome.Papers.desktop",
+        text: "panama-nvim.desktop",
+        archives: "org.gnome.FileRoller.desktop"
     } and
     .autostartEntries == [{id: "nextcloud.desktop", name: "Nextcloud", enabled: false}] and
     (.luaAutostartEntries | length == 2) and
@@ -163,28 +172,49 @@ assert_call() {
 $helper set-default browser org.mozilla.firefox.desktop
 assert_call $'set\ndefault-web-browser\norg.mozilla.firefox.desktop'
 
-roles=(mail files terminal music images video)
-desktop_ids=(
-    org.gnome.Geary.desktop
-    org.gnome.Nautilus.desktop
-    org.gnome.Ptyxis.desktop
-    org.gnome.Rhythmbox3.desktop
-    org.gnome.Loupe.desktop
-    org.gnome.Totem.desktop
-)
-mime_types=(
-    x-scheme-handler/mailto
-    inode/directory
-    x-scheme-handler/terminal
-    audio/mpeg
-    image/png
-    video/mp4
-)
-for index in "${!roles[@]}"; do
+# Setting a role must write EVERY type in its family, in order.
+#
+# The families are spelled out here rather than read from the helper: a test
+# that derives its expectation from the code it is testing would have passed
+# just as happily when "images" governed image/png alone.
+assert_family() {
+    local role="$1" desktop_id="$2"
+    shift 2
+    local expected=""
+    local mime
+    for mime in "$@"; do
+        expected+=$'default\n'"$desktop_id"$'\n'"$mime"$'\n'
+    done
     : >"$call_log"
-    $helper set-default "${roles[$index]}" "${desktop_ids[$index]}"
-    assert_call $'default\n'"${desktop_ids[$index]}"$'\n'"${mime_types[$index]}"
-done
+    $helper set-default "$role" "$desktop_id"
+    local actual
+    actual="$(cat "$call_log")"
+    [[ "$actual" == "${expected%$'\n'}" ]] || {
+        printf 'expected argv:\n%s\nactual argv:\n%s\n' "${expected%$'\n'}" "$actual" >&2
+        fail "the \"$role\" role was applied to the wrong set of types"
+    }
+}
+
+assert_family mail org.gnome.Geary.desktop x-scheme-handler/mailto
+assert_family files org.gnome.Nautilus.desktop inode/directory
+assert_family terminal org.gnome.Ptyxis.desktop x-scheme-handler/terminal
+assert_family music org.gnome.Rhythmbox3.desktop \
+    audio/mpeg audio/flac audio/x-vorbis+ogg audio/ogg \
+    audio/x-wav audio/mp4 audio/aac audio/opus
+assert_family images org.gnome.Loupe.desktop \
+    image/png image/jpeg image/gif image/webp \
+    image/tiff image/bmp image/svg+xml image/avif
+assert_family video org.gnome.Totem.desktop \
+    video/mp4 video/x-matroska video/webm video/quicktime \
+    video/x-msvideo video/mpeg
+assert_family documents org.gnome.Papers.desktop \
+    application/pdf application/epub+zip
+assert_family text panama-nvim.desktop \
+    text/plain text/markdown text/x-python text/x-csrc text/x-chdr \
+    text/x-c++src text/x-shellscript application/json application/x-yaml text/xml
+assert_family archives org.gnome.FileRoller.desktop \
+    application/zip application/x-tar application/gzip \
+    application/x-7z-compressed application/vnd.rar
 
 : >"$call_log"
 if $helper set-default unknown org.mozilla.firefox.desktop >/dev/null 2>&1; then
@@ -251,4 +281,36 @@ if $helper add-autostart ../escape.desktop >/dev/null 2>&1; then
     fail 'an unsafe desktop id was accepted for autostart'
 fi
 
+# Seeding fills roles nobody has chosen for, and never overrules a choice.
+#
+# The distinction matters because seeding runs on every setup: someone who has
+# deliberately pointed PNGs at an editor must not have that undone the next time
+# they re-link their dotfiles.
+: >"$call_log"
+seed_output="$($helper seed)" || fail 'seed command failed'
+rg --quiet '^images: org\.gnome\.Loupe\.desktop$' <<<"$seed_output" \
+    || fail 'seeding did not curate an unclaimed role'
+rg --quiet '^documents: org\.gnome\.Papers\.desktop$' <<<"$seed_output" \
+    || fail 'seeding did not curate documents'
+rg --quiet '^music: no preferred application installed' <<<"$seed_output" \
+    || fail 'seeding must leave a role alone when none of its candidates is installed'
+rg --quiet '^default$' "$call_log" \
+    || fail 'seeding never reached xdg-mime'
+
+# A recorded choice wins, and only that role is skipped.
+cat >"$config_home/mimeapps.list" <<'MIMEAPPS'
+[Default Applications]
+image/png=org.gnome.Totem.desktop
+MIMEAPPS
+: >"$call_log"
+seed_output="$($helper seed)" || fail 'seed command failed on a machine with recorded choices'
+rg --quiet '^images: keeping the existing choice$' <<<"$seed_output" \
+    || fail 'seeding overruled a choice the user had already made'
+rg --quiet '^documents: org\.gnome\.Papers\.desktop$' <<<"$seed_output" \
+    || fail 'one recorded choice suppressed an unrelated role'
+rg --quiet 'image/png' "$call_log" \
+    && fail 'seeding rewrote a type the user had already chosen for'
+
+rm -f "$config_home/mimeapps.list"
+
 printf 'default apps contract: PASS\n'