refactor: remove frequency chart from list of letters, sounds, words

pom-dependency-tree.txt

@@ -1,5 +1,5 @@
-ai.elimu:webapp:war:2.6.142-SNAPSHOT
-+- ai.elimu:model:jar:model-2.0.127:compile
+ai.elimu:webapp:war:2.6.148-SNAPSHOT
++- ai.elimu:model:jar:model-2.0.128:compile
 |  \- com.google.code.gson:gson:jar:2.13.1:compile
 |     \- com.google.errorprone:error_prone_annotations:jar:2.38.0:compile
 +- org.springframework:spring-context:jar:6.0.11:compile

src/main/java/ai/elimu/web/content/letter/LetterListController.java

@@ -1,17 +1,8 @@
 package ai.elimu.web.content.letter;
 
 import ai.elimu.dao.LetterDao;
-import ai.elimu.dao.StoryBookParagraphDao;
 import ai.elimu.entity.content.Letter;
-import ai.elimu.entity.content.StoryBookParagraph;
-import ai.elimu.model.v2.enums.Language;
-import ai.elimu.util.ConfigHelper;
-import ai.elimu.util.LetterFrequencyHelper;
-
-import java.util.ArrayList;
 import java.util.List;
-import java.util.Map;
-
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Controller;
@@ -27,8 +18,6 @@ public class LetterListController {
 
   private final LetterDao letterDao;
 
-  private final StoryBookParagraphDao storyBookParagraphDao;
-
   @GetMapping
   public String handleRequest(Model model) {
     log.info("handleRequest");
@@ -44,15 +33,6 @@ public String handleRequest(Model model) {
     }
     model.addAttribute("maxUsageCount", maxUsageCount);
 
-    // Extract letter frequency distribution from storybook paragraphs
-    List<String> paragraphs = new ArrayList<>();
-    for (StoryBookParagraph storyBookParagraph : storyBookParagraphDao.readAll()) {
-      paragraphs.add(storyBookParagraph.getOriginalText());
-    }
-    Language language = Language.valueOf(ConfigHelper.getProperty("content.language"));
-    Map<String, Integer> letterFrequencyMap = LetterFrequencyHelper.getLetterFrequency(paragraphs, language);
-    model.addAttribute("letterFrequencyMap", letterFrequencyMap);
-
     return "content/letter/list";
   }
 }

src/main/webapp/WEB-INF/jsp/content/letter/list.jsp

@@ -4,38 +4,6 @@
 
 <content:section cssId="letterListPage">
     <div class="section row">
-        <div class="card-panel">
-            <script src="https://cdn.jsdelivr.net/npm/chart.js@4.4.4/dist/chart.umd.min.js"></script>
-            <canvas id="chart"></canvas>
-            <script>
-                var ctx = document.getElementById('chart');
-                var data = {
-                    labels: [
-                        <c:forEach var="key" items="${letterFrequencyMap.keySet()}">
-                            '<c:out value="${key}" escapeXml="true" />',
-                        </c:forEach>
-                    ],
-                    datasets: [
-                        {
-                            data: [
-                                <c:forEach var="key" items="${letterFrequencyMap}">
-                                    ${key.value},
-                                </c:forEach>
-                            ],
-                            label: 'Letter frequency distribution',
-                            backgroundColor: 'rgba(149,117,205, 0.5)', // #9575cd deep-purple lighten-2
-                        }
-                    ]
-                };
-                var options = {};
-                new Chart(ctx, {
-                    type: 'bar',
-                    data: data,
-                    options: options
-                });
-            </script>
-        </div>
-
         <a id="exportToCsvButton" class="right btn waves-effect waves-light grey-text white" 
            href="<spring:url value='/content/letter/list/letters.csv' />">
             Export to CSV<i class="material-icons right">vertical_align_bottom</i>