FIX: Don't cook user fields to apply watched words (#17590)

The previous method for reused the PrettyText logic which applied the
watched word logic, but had the unwanted effect of cooking the text too.
This meant that regular text values were converted to HTML.

Follow up to commit 5a4c35f627.

app/services/word_watcher.rb

@@ -99,7 +99,7 @@ class WordWatcher
   end
 
   def self.censor(html)
-    regexp = WordWatcher.word_matcher_regexp(:censor)
+    regexp = word_matcher_regexp(:censor)
     return html if regexp.blank?
 
     doc = Nokogiri::HTML5::fragment(html)
@@ -110,12 +110,24 @@ class WordWatcher
   end
 
   def self.censor_text(text)
-    regexp = WordWatcher.word_matcher_regexp(:censor)
+    regexp = word_matcher_regexp(:censor)
     return text if regexp.blank?
 
     censor_text_with_regexp(text, regexp)
   end
 
+  def self.apply_to_text(text)
+    if regexp = word_matcher_regexp(:censor)
+      text = censor_text_with_regexp(text, regexp)
+    end
+
+    %i[replace link]
+      .flat_map { |type| word_matcher_regexps(type).to_a }
+      .reduce(text) do |t, (word_regexp, replacement)|
+        t.gsub(Regexp.new(word_regexp)) { |match| "#{match[0]}#{replacement}" }
+      end
+  end
+
   def self.clear_cache!
     WatchedWord.actions.each do |a, i|
       Discourse.cache.delete word_matcher_regexp_key(a)