fix(server): label inline AI feedback compactly

Author: FelixTJDietrich

server/src/main/java/de/tum/cit/aet/hephaestus/agent/handler/PracticeFeedbackCommentFormatter.java

@@ -43,7 +43,7 @@ String appendDisclosure(String sanitizedBody, AgentJob job) {
     String appendInlineFeedbackPrompt(String sanitizedBody) {
         var sb = new StringBuilder(sanitizedBody.length() + 120);
         sb.append(sanitizedBody).append("\n\n");
-        sb.append("<sub>React with 👍 or 👎, or reply, to give feedback.</sub>\n");
+        sb.append("<sub>AI-generated &middot; React with 👍 or 👎, or reply, to give feedback.</sub>\n");
         return sb.toString();
     }
 

server/src/test/java/de/tum/cit/aet/hephaestus/agent/handler/DiffNotePosterTest.java

@@ -101,8 +101,7 @@ void multiLineNote_swapsToEndLineAnchorWithRangeStart_andCarriesRecurrenceKey()
         assertThat(anchor.filePath()).isEqualTo("src/A.java");
         assertThat(anchor.newLineNumber()).isEqualTo(14);
         assertThat(f.body())
-            .contains("<sub>React with 👍 or 👎, or reply, to give feedback.</sub>")
-            .doesNotContain("AI-generated")
+            .contains("<sub>AI-generated &middot; React with 👍 or 👎, or reply, to give feedback.</sub>")
             .doesNotContain("Why you're seeing this");
         assertThat(anchor.startLine()).isEqualTo(10);
         assertThat(f.recurrenceKey()).isEqualTo("ck-multi");

server/src/test/java/de/tum/cit/aet/hephaestus/agent/handler/PracticeFeedbackCommentFormatterTest.java

@@ -61,7 +61,8 @@ void appendsFeedbackPromptToInlineComment() {
         String result = formatter("https://hephaestus.example").appendInlineFeedbackPrompt("Inline feedback");
 
         assertThat(result).isEqualTo(
-            "Inline feedback\n\n<sub>React with 👍 or 👎, or reply, to give feedback.</sub>\n"
+            "Inline feedback\n\n" +
+                "<sub>AI-generated &middot; React with 👍 or 👎, or reply, to give feedback.</sub>\n"
         );
     }