fix whiptail capture bug (2>/dev/null killed selections); add artic; fix ENABLE_MAP

Root cause of all 85 engines being disabled:
  `3>&1 1>&2 2>&3 2>/dev/null` — the trailing `2>/dev/null` overwrites FD2
  with /dev/null AFTER the FD swap, destroying the pipe that whiptail writes
  selections to. User selections were silently discarded every time. Remove it.

Also: if whiptail exits 0 but returns empty string (all items unchecked),
fall back to pre-checked defaults rather than disabling everything.

ENABLE_MAP: unbound variable (configure-searxng-safesearch.sh):
  bash < 4.4 treats `${!empty_assoc[@]}` as unbound under `set -u`.
  Wrap for loops and mark_disabled key-check with set +u / set -u.

Add artic (Art Institute of Chicago) to image engine menus.
Add yandex images (defaults OFF for moderate/strict, same as yandex).
Update _SX_AUTOFF to include "yandex images" so re-enabling it works.
Update configure script engine category lists to match expanded menus.

https://claude.ai/code/session_012gDnantBmFTWZGCiKyjazx

configure-searxng-safesearch.sh

@@ -81,24 +81,29 @@ NO_SAFESEARCH_ENGINES=(
   # Web engines without safe-search API
   "mojeek" "naver" "baidu"
   # Yandex: parameter exists but not reliably enforced for non-Russian queries
-  "yandex"
+  "yandex" "yandex images"
   # Video frontends — no safe-search passthrough
   "invidious" "piped" "peertube" "sepiasearch"
 )
 
 # ── Category → engine lists ───────────────────────────────────────────────────
 VIDEOS_ENGINES=(
-  "youtube" "invidious" "piped" "peertube" "sepiasearch"
-  "dailymotion" "vimeo"
-  "bing videos" "duckduckgo videos" "google videos"
+  "youtube" "bing videos" "brave videos" "duckduckgo videos" "google videos" "qwant videos"
+  "dailymotion" "media.ccc.de" "wikcommons.videos"
+  "vimeo" "odysee" "rumble" "bitchute"
+  "invidious" "piped" "peertube" "sepiasearch"
 )
 IMAGES_ENGINES=(
-  "google images" "bing images" "duckduckgo images"
-  "brave images" "qwant images"
-  "flickr" "unsplash" "imgur" "deviantart" "openverse"
+  "google images" "bing images" "duckduckgo images" "brave images" "qwant images"
+  "startpage images" "mojeek images" "presearch images"
+  "openverse" "unsplash" "pexels" "pixabay images" "pinterest" "flickr"
+  "wikcommons.images" "artic" "yandex images"
+  "imgur" "deviantart" "artstation" "adobe stock"
 )
 NEWS_ENGINES=(
   "google news" "bing news" "duckduckgo news" "brave news" "qwant news"
+  "startpage news" "presearch news" "mojeek news"
+  "reuters" "yahoo news" "wikinews" "yep news"
 )
 SCIENCE_ENGINES=(
   "arxiv" "semantic scholar" "pubmed" "crossref" "base"
@@ -123,7 +128,9 @@ fi
 # Helper: add to DISABLE_MAP unless explicitly re-enabled
 mark_disabled() {
   local eng="$1"
-  [[ -n "${ENABLE_MAP[$eng]+x}" ]] && return   # user said keep it
+  # Use set +u to safely check array key existence on bash < 4.4 (set -u quirk)
+  set +u; local _chk="${ENABLE_MAP[$eng]+x}"; set -u
+  [[ -n "$_chk" ]] && return   # user said keep it
   DISABLE_MAP["$eng"]=1
 }
 
@@ -167,12 +174,15 @@ SECRET_KEY=$(grep -oP '(?<=secret_key: ")[^"]+' "$SETTINGS" 2>/dev/null || true)
 
 # ── Build engine override block ───────────────────────────────────────────────
 ENGINE_BLOCK=""
+# set +u: iterating empty associative arrays throws "unbound variable" on bash <4.4
+set +u
 for eng in "${!DISABLE_MAP[@]}"; do
   ENGINE_BLOCK+="  - name: ${eng}\n    disabled: true\n"
 done
 for eng in "${!ENABLE_MAP[@]}"; do
   ENGINE_BLOCK+="  - name: ${eng}\n    disabled: false\n"
 done
+set -u
 
 # ── Write settings.yml ────────────────────────────────────────────────────────
 {