fix(intelligence): fix HashMap determinism in FileInventory + gitignore entries (RAN-154)

- countsByLanguage(): use TreeMap::new for deterministic alphabetical key ordering
- toSummary() byLang: add thenComparing secondary sort to break ties alphabetically
- toSummary() byCls: use LinkedHashMap::new to preserve TreeMap insertion order
- .gitignore: add playwright-report/ and test-results/ frontend build artifacts

Co-Authored-By: Paperclip <noreply@paperclip.ing>

Author: aksOps

.gitignore

@@ -43,6 +43,8 @@ src/main/frontend/node_modules/
 src/main/frontend/node/
 src/main/frontend/dist/
 src/main/frontend/tsconfig.tsbuildinfo
+playwright-report/
+test-results/
 # Generated explorer CSS (rebuild via: cd src/main/frontend && npm run build:explorer-css)
 src/main/resources/static/css/explorer.css
 

src/main/java/io/github/randomcodespace/iq/intelligence/FileInventory.java

@@ -32,10 +32,11 @@ public Map<FileClassification, Long> countsByClassification() {
                         TreeMap::new, Collectors.counting()));
     }
 
-    /** Count of files per language. */
+    /** Count of files per language, sorted alphabetically for determinism. */
     public Map<String, Long> countsByLanguage() {
         return entries.stream()
-                .collect(Collectors.groupingBy(FileEntry::language, Collectors.counting()));
+                .collect(Collectors.groupingBy(FileEntry::language,
+                        TreeMap::new, Collectors.counting()));
     }
 
     /** Sum of all file sizes in bytes. */
@@ -51,10 +52,15 @@ public Map<String, Object> toSummary() {
         summary.put("total_files", totalFiles());
         summary.put("total_bytes", totalBytes());
         var byCls = countsByClassification().entrySet().stream()
-                .collect(Collectors.toMap(e -> e.getKey().name().toLowerCase(), Map.Entry::getValue));
+                .collect(Collectors.toMap(
+                        e -> e.getKey().name().toLowerCase(),
+                        Map.Entry::getValue,
+                        (a, b) -> a,
+                        java.util.LinkedHashMap::new));  // preserve TreeMap insertion order
         summary.put("by_classification", byCls);
         var byLang = countsByLanguage().entrySet().stream()
-                .sorted(Map.Entry.<String, Long>comparingByValue().reversed())
+                .sorted(Map.Entry.<String, Long>comparingByValue().reversed()
+                        .thenComparing(Map.Entry.comparingByKey()))
                 .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue,
                         (a, b) -> a, java.util.LinkedHashMap::new));
         summary.put("by_language", byLang);