fix: hallucination when no reviews are provided

Author: Junyi-99

src/templates/paper-review-summary-weakness.njk

@@ -1,8 +1,8 @@
 # Instruction
 
-what are the core ideas in the review? I think the reviews are too long. Please summarize the core ideas from the review, boiled down and condensed, and indicate the importance level of each review.
+what are the core ideas in the review? I think the reviews are too long. Please summarize the core ideas from the review, boiled down and condensed, and indicate the importance level of each review. If no reviews provided or actionable, please leave the summary and suggestion tag empty.
 
-## Importance Levels
+Here are definitions of importance levels:
 - Critical: Addresses fundamental flaws affecting the research's validity, clarity, or rigor. Must be resolved for the work to be publishable.
 - High: Substantive improvements that strengthen credibility and relevance, but do not undermine core arguments.
 - Medium: Improvements that enhance clarity, completeness, or accessibility, though their absence does not compromise the main contribution.
@@ -20,6 +20,7 @@ what are the core ideas in the review? I think the reviews are too long. Please
 </SUGGESTIONS>
 ```
 
-# Here is the review:
-
-{{fullReview}}
+# Here is the review
+<REVIEW>
+{{ fullReview }}
+</REVIEW>