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src/services/gemini.js

@@ -28,18 +28,39 @@ Rules:
 
 // System Instructions for the Dashboard Analyst
 const ANALYST_INSTRUCTION = `
-You are an expert Prompt Engineer and Pedagogy Analyst.
-Your task is to analyze a batch of student prompts for a specific coding challenge.
+You are an expert Prompt Engineer and Pedagogy Analyst for a coding/AI prompting class.
+Your task is to analyze a batch of student prompts for a specific challenge.
+
+You will receive:
+1. The Challenge Description (the goal students are trying to achieve)
+2. A list of Student Submissions (their prompts)
+
 Categorize each prompt into ONE of these categories:
-1. "rough": Logic is correct/creative, but syntax or formatting is messy. (Rough Diamond)
-2. "precise": Clean, efficient, and accurate. (Pixel Perfect)
-3. "gentle": Uses polite language ("Please", "Thank you") or positive vibes. (Gentle Soul)
-4. "creative": Unconventional approach or interesting parameter usage. (Wild Card)
-5. "spam": Nonsense, random characters ("asdf"), or irrelevant text.
-6. "parrot": Direct copy-paste of the challenge description or problem statement.
+
+1. "rough" (原石): The student only says vague things like "fix the error" or "make it work" WITHOUT explaining:
+   - What the error is
+   - What the expected behavior should be
+   - Any specific details about the problem
+   These are "rough diamonds" - they tried but need to be more specific.
+
+2. "precise" (精確): Clean, well-structured prompt that clearly states:
+   - The goal or expected result
+   - Specific details or parameters
+   - Clear logic or reasoning
+
+3. "gentle" (有禮): Uses polite language like "請", "謝謝", "拜託", "Please", "Thank you"
+
+4. "creative" (創意): Unconventional, imaginative approach. Uses interesting parameters or unexpected methods that still address the challenge.
+
+5. "spam" (無效): Content that is clearly UNRELATED to the challenge topic. Compare with other submissions to identify outliers that don't match what most students are trying to do. Examples:
+   - Random characters ("asdf", "123")
+   - Completely off-topic text
+   - Empty or near-empty responses
+
+6. "parrot" (鸚鵡): Direct copy-paste of the challenge description without any modification or personal attempt.
 
 Return ONLY a JSON object mapping category names to arrays of Student IDs.
-Example: { "rough": ["id1"], "precise": ["id2", "id5"], "spam": ["id3"] ... }
+Example: { "rough": ["id1"], "precise": ["id2", "id5"], "spam": ["id3"] }
 `;
 
 /**

src/views/AdminView.js

@@ -87,13 +87,8 @@ export function setupAdminEvents() {
     loadChallenges();
 
     document.getElementById('back-instructor-btn').addEventListener('click', () => {
-        const referer = localStorage.getItem('vibecoding_admin_referer');
-        if (referer === 'instructor') {
-            window.location.hash = 'instructor';
-        } else {
-            window.location.hash = ''; // Main landing
-        }
-        localStorage.removeItem('vibecoding_admin_referer');
+        // Always go back to instructor view since admin is only accessible from there
+        window.location.hash = 'instructor';
     });
 
     document.getElementById('add-challenge-btn').addEventListener('click', () => {

src/views/InstructorView.js

@@ -1461,22 +1461,30 @@ export function setupInstructorEvents() {
                             if (!confirm('確定要退回此題目讓學員重做嗎？')) return;
 
                             // We need student ID (userId) and Challenge ID.
-                            // Currently showBroadcastModal only receives nickname, title, prompt.
-                            // We need to attach data-userid and data-challengeid to the modal.
                             const modal = document.getElementById('broadcast-modal');
                             const userId = modal.dataset.userId;
                             const challengeId = modal.dataset.challengeId;
                             const roomCode = localStorage.getItem('vibecoding_instructor_room');
 
-                            if (userId && challengeId && roomCode) {
-                                try {
-                                    await resetProgress(userId, roomCode, challengeId);
-                                    // Close modal
-                                    window.closeBroadcast();
-                                } catch (e) {
-                                    console.error(e);
-                                    alert('退回失敗');
-                                }
+                            console.log('Reject attempt:', { userId, challengeId, roomCode });
+
+                            if (!userId || !challengeId) {
+                                alert('找不到學員或題目資料，請重新開啟作品');
+                                return;
+                            }
+                            if (!roomCode) {
+                                alert('未連接到教室，請先加入教室');
+                                return;
+                            }
+
+                            try {
+                                await resetProgress(userId, roomCode, challengeId);
+                                alert('已成功退回，學員將需要重新作答');
+                                // Close modal
+                                window.closeBroadcast();
+                            } catch (e) {
+                                console.error(e);
+                                alert('退回失敗: ' + e.message);
                             }
                         });
                         // Prompt Viewer Logic