test(post-form): retarget suite to redesigned /post + add UX coverage (U7)

- test-form-config.sh: assert parent is NOT hardcoded (injected server-side),
  active_trip set in site.yaml, and the new fields incl. custom 'photos' type.
- helpers.js: resolve active trip from site.active_trip (parent coupling gone);
  fillEditor() drives EasyMDE via window.postFormEditor; waitForPhotoUpload()
  waits on the new picker.
- post.spec / validation.spec: content via the editor, filepond selectors ->
  the photo picker, P8 checks editor value, V3/V4 exercise the picker cap +
  fail-closed non-image.
- post-form-ux.spec.js (new): AE3 disclosure, AE1 HEIC->JPEG, AE4 corrupt-HEIC
  fail-closed, R18 weather gating, R20 draft restore.
- fixtures: real + corrupt .heic.
- test-post.sh: resolve dailies dir from active_trip.

Refs AE1-AE4, R18, R20, U7.

scripts/test-form-config.sh

@@ -4,6 +4,7 @@
 set -euo pipefail
 
 FORM="user/pages/02.post/post-form.md"
+SITE="user/config/site.yaml"
 PASS=0
 FAIL=0
 ERRORS=()
@@ -12,8 +13,13 @@ ok()   { echo "  ✓ $1"; PASS=$((PASS+1)); }
 fail() { echo "  ✗ $1"; FAIL=$((FAIL+1)); ERRORS+=("$1"); }
 
 check_grep() {
-    local desc="$1"; local pattern="$2"
-    if grep -q "$pattern" "$FORM"; then ok "$desc"; else fail "$desc"; fi
+    local desc="$1"; local pattern="$2"; local file="${3:-$FORM}"
+    if grep -q "$pattern" "$file"; then ok "$desc"; else fail "$desc"; fi
+}
+
+check_absent() {
+    local desc="$1"; local pattern="$2"; local file="${3:-$FORM}"
+    if grep -q "$pattern" "$file"; then fail "$desc"; else ok "$desc"; fi
 }
 
 echo ""
@@ -24,25 +30,43 @@ echo "────────────────────────
 grep -q "add_page:\|addpage:" "$FORM" && ok "Process action is 'add_page' (plugin trigger)" \
     || fail "Process action must be 'add_page: true' — 'add-page-by-form' is not handled by the plugin"
 
-# Config must be in frontmatter, not in the process block
-check_grep "pageconfig block exists in frontmatter"       "^pageconfig:"
-check_grep "parent set to /trips/japan-korea-2026/dailies" "parent: '/trips/japan-korea-2026/dailies'"
-check_grep "slug_field set (determines entry folder name)" "slug_field:"
-check_grep "pagefrontmatter block exists in frontmatter"  "^pagefrontmatter:"
-check_grep "template: entry (creates entry.md filename)"  "template: entry"
+# Parent is now injected server-side from site.active_trip by the cache-on-save
+# plugin (U1). The form must NOT hardcode pageconfig.parent — that coupling was
+# the silent-misfile bug this whole change removes.
+check_absent "pageconfig.parent is NOT hardcoded (injected server-side from active_trip)" "^\s*parent:"
+check_grep   "pageconfig block exists in frontmatter"        "^pageconfig:"
+check_grep   "slug_field set (determines entry folder name)" "slug_field:"
+check_grep   "pagefrontmatter block exists in frontmatter"   "^pagefrontmatter:"
+check_grep   "template: entry (creates entry.md filename)"   "template: entry"
+
+# The active trip — the server-side injection source — must be set in site.yaml.
+check_grep "active_trip set in site.yaml (injection source)" "^active_trip:\s*\S" "$SITE"
 
 # Form name must stay 'new-entry' — cache-on-save plugin checks this exact string
 check_grep "form name is 'new-entry' (required by cache-on-save plugin)" "name: new-entry"
 
-# Required form fields
-check_grep "title field present"          "name: title"
-check_grep "date field present"           "name: date"
-check_grep "content field present"        "name: content"
-check_grep "lat field present"            "name: lat"
-check_grep "lng field present"            "name: lng"
-check_grep "location_city field present"  "name: location_city"
+# Core form fields
+check_grep "title field present"            "name: title"
+check_grep "date field present"             "name: date"
+check_grep "content field present"          "name: content"
+check_grep "photos field present"           "name: photos"
+check_grep "lat field present"              "name: lat"
+check_grep "lng field present"              "name: lng"
+check_grep "location_city field present"    "name: location_city"
 check_grep "location_country field present" "name: location_country"
 
+# Fields exposed by U2 (weather picker + transport + advanced trio)
+check_grep "weather_desc field present"     "name: weather_desc"
+check_grep "weather_temp_c field present"   "name: weather_temp_c"
+check_grep "transport_mode field present"   "name: transport_mode"
+check_grep "hero_image field present"       "name: hero_image"
+check_grep "force_connect field present"    "name: force_connect"
+check_grep "featured field present"         "name: featured"
+
+# Photos must use the custom controlled picker (U4), not filepond/file — that is
+# what lets post-form.js convert HEIC before upload.
+check_grep "photos field uses the custom 'photos' type (HEIC pipeline)" "type: photos"
+
 echo "────────────────────────────────────────"
 echo "  $PASS passed, $FAIL failed"