Merge master: Groq, and cleanup on a subscription

Three of master's changes land on the same lines as this branch, so most of
this is picking the newer shape and putting the local half back into it.

cleanup.py arrived while this was being written and is the right place for
a fourth provider, so the Target refactor of api.cleanup goes away: llama.cpp
becomes a name in cleanup.PROVIDERS next to OpenRouter, Claude Code and
Codex, and worker.py, meeting.py and filetranscribe.py go back to master's.

The settings window keeps master's one row per provider, hidden with
setRowVisible, rather than the two wrapper widgets this branch had. So does
speech to text, which was doing the same thing its own way.

The transcriber table has no room for a provider with no key and no base
URL, so the local one is answered before the lookup rather than added to
it, and an unknown name now falls back to openai by name: the shipped
default is no longer a key of that table.

The minutes stay on OpenRouter, which master already decided by routing
only the transcript through cleanup.run, so meeting_provider goes.

install.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# Dikte installer: dependency check, launchers, KDE shortcut.
+# Dikte installer: dependency check, launchers, global shortcuts.
 set -euo pipefail
 
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
@@ -8,6 +8,9 @@ BIN_DIR="$HOME/.local/bin"
 APP_DIR="$HOME/.local/share/applications"
 AUTOSTART_DIR="$HOME/.config/autostart"
 SHORTCUT="${1:-Ctrl+Space}"
+# Without the colon, so that a second argument given as "" stays empty. That is
+# how update.sh says "this one was turned off", as against not saying anything.
+CANCEL_SHORTCUT="${2-Ctrl+Alt+Space}"
 
 say()  { printf '  %s\n' "$1"; }
 ok()   { printf '  \033[32m✓\033[0m %s\n' "$1"; }
@@ -88,30 +91,43 @@ StartupNotify=false
 EOF
 ok "Will start automatically on login"
 
-# 4. KDE global shortcut ---------------------------------------------------
-cat > "$APP_DIR/dikte-toggle.desktop" <<EOF
-[Desktop Entry]
-Exec=$PY $DIR/dikte.py toggle
-Name=Dikte: start/stop recording
-NoDisplay=true
-StartupNotify=false
-Type=Application
-X-KDE-GlobalAccel-CommandShortcut=true
-EOF
+# 4. Global shortcuts ------------------------------------------------------
+# Two of them: one to start and stop, one to throw the recording away. The
+# second is worth a key of its own because stopping is the step there is no
+# taking back, being what sends the audio off to be transcribed.
+#
+# Dikte registers them rather than this script writing the files itself: it
+# knows which desktop it is on, and it stores the combination in the settings
+# as well, which is where the built-in listener reads it from. A key written
+# to only one of the two places is a key that half works.
+if [[ "$SHORTCUT" == "$CANCEL_SHORTCUT" ]]; then
+  warn "Both arguments are $SHORTCUT, so the discard key was left out."
+  say  "Pass two different combinations, or set it in Settings → Shortcuts."
+  CANCEL_SHORTCUT=""
+fi
 
-if [[ "${XDG_CURRENT_DESKTOP:-}" == *GNOME* || "${XDG_CURRENT_DESKTOP:-}" == *gnome* ]]; then
-  ok "GNOME detected"
-  say "Open Dikte Settings > Shortcut to install the global shortcut."
-elif command -v kwriteconfig6 >/dev/null; then
-  kwriteconfig6 --notify --file kglobalshortcutsrc \
-    --group services --group dikte-toggle.desktop \
-    --key _launch "$SHORTCUT"
-  ok "KDE shortcut registered: $SHORTCUT"
-  warn "KWin only reads this at startup, so the shortcut goes live after your"
-  say  "next login. Until then open Settings → Shortcut and turn on the"
-  say  "built-in listener to use it right away."
+register() {   # which  combination  label
+  if out="$("$PY" "$DIR/dikte.py" shortcut install "$1" --combo "$2" 2>&1)"; then
+    ok "$3: $2"
+  else
+    # One line: the rest of what it has to say about KWin is printed below.
+    warn "${out%%$'\n'*}"
+  fi
+}
+
+if python3 -c 'import PyQt6.QtWidgets' 2>/dev/null; then
+  register toggle "$SHORTCUT" "Start and stop"
+  if [[ -n "$CANCEL_SHORTCUT" ]]; then
+    register cancel "$CANCEL_SHORTCUT" "Discard the recording"
+  fi
+  if [[ "${XDG_CURRENT_DESKTOP:-}" != *[Gg][Nn][Oo][Mm][Ee]* ]]; then
+    warn "KWin only reads these at startup, so they go live after your next"
+    say  "login. Until then open Settings → Shortcuts and turn on the"
+    say  "built-in listener to use them right away."
+  fi
 else
-  warn "No supported shortcut manager found. Add the shortcut in desktop settings."
+  warn "PyQt6 is missing, so no shortcut was registered. Install it, then run:"
+  say  "dikte shortcut install toggle --combo '$SHORTCUT'"
 fi
 
 echo