feat: Add @codebot review-again command for manual PR re-review

- Add review-again command to trigger PR review without new commits
- Implement review comparison logic to show resolved/new/changed issues
- Update workflow to handle PR comments via dispatcher
- Add comprehensive help documentation in README and CLAUDE.md
- Show diff from previous review with resolved/new issues count
- Update PR labels based on new severity assessment
- Support re-evaluation after config changes or false positive clarification

Key features:
- ✅ Shows diff from previous review (resolved/new/changed issues)
- 🏷️ Updates labels based on new severity
- ⚡ No need for empty commits to trigger review
- 🔧 Respects latest .ai-review.yml configuration

Closes feature request for manual PR re-review capability

.gitea/workflows/ai-comment-reply.yml

@@ -1,41 +1,50 @@
 name: AI Comment Reply
 
 on:
-  issue_comment:
-    types: [created]
+    issue_comment:
+        types: [created]
 
 # CUSTOMIZE YOUR BOT NAME:
 # Change '@ai-bot' below to match your config.yml mention_prefix
 # Examples: '@bartender', '@uni', '@joey', '@codebot'
 
 jobs:
-  ai-reply:
-    runs-on: ubuntu-latest
-    if: contains(github.event.comment.body, '@codebot') # <-- Change this to your bot name
-    steps:
-      - uses: actions/checkout@v4
+    ai-reply:
+        runs-on: ubuntu-latest
+        if: contains(github.event.comment.body, '@codebot') # <-- Change this to your bot name
+        steps:
+            - uses: actions/checkout@v4
 
-      - uses: actions/checkout@v4
-        with:
-          repository: Hiddenden/openrabbit
-          path: .ai-review
-          token: ${{ secrets.AI_REVIEW_TOKEN }}
+            - uses: actions/checkout@v4
+              with:
+                  repository: Hiddenden/openrabbit
+                  path: .ai-review
+                  token: ${{ secrets.AI_REVIEW_TOKEN }}
 
-      - uses: actions/setup-python@v5
-        with:
-          python-version: "3.11"
+            - uses: actions/setup-python@v5
+              with:
+                  python-version: "3.11"
 
-      - run: pip install requests pyyaml
+            - run: pip install requests pyyaml
 
-      - name: Run AI Comment Response
-        env:
-          AI_REVIEW_TOKEN: ${{ secrets.AI_REVIEW_TOKEN }}
-          AI_REVIEW_REPO: ${{ gitea.repository }}
-          AI_REVIEW_API_URL: https://git.hiddenden.cafe/api/v1
-          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
-          OPENROUTER_API_KEY: ${{ secrets.OPENROUTER_API_KEY }}
-          OLLAMA_HOST: ${{ secrets.OLLAMA_HOST }}
-        run: |
-          cd .ai-review/tools/ai-review
-          python main.py comment ${{ gitea.repository }} ${{ gitea.event.issue.number }} \
-            "${{ gitea.event.comment.body }}"
+            - name: Run AI Comment Response
+              env:
+                  AI_REVIEW_TOKEN: ${{ secrets.AI_REVIEW_TOKEN }}
+                  AI_REVIEW_REPO: ${{ gitea.repository }}
+                  AI_REVIEW_API_URL: https://git.hiddenden.cafe/api/v1
+                  OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+                  OPENROUTER_API_KEY: ${{ secrets.OPENROUTER_API_KEY }}
+                  OLLAMA_HOST: ${{ secrets.OLLAMA_HOST }}
+              run: |
+                  cd .ai-review/tools/ai-review
+
+                  # Check if this is a PR or an issue
+                  if [ "${{ gitea.event.issue.pull_request }}" != "" ]; then
+                    # This is a PR comment - dispatch as issue_comment event
+                    python main.py dispatch ${{ gitea.repository }} issue_comment \
+                      '{"action":"created","issue":${{ toJSON(gitea.event.issue) }},"comment":${{ toJSON(gitea.event.comment) }}}'
+                  else
+                    # This is an issue comment - use the comment command
+                    python main.py comment ${{ gitea.repository }} ${{ gitea.event.issue.number }} \
+                      "${{ gitea.event.comment.body }}"
+                  fi