Fix critical issues breaking task execution cycle

- Fix branch name validation by hashing peer IDs using SHA256
- Fix Hive API claiming error by using correct 'task_number' parameter
- Improve console app display with 300% wider columns and adaptive width
- Add GitHub CLI integration to sandbox with token authentication
- Enhance system prompt with collaboration guidelines and help escalation
- Fix sandbox lifecycle to preserve work even if PR creation fails

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Dockerfile.sandbox

@@ -7,6 +7,15 @@ RUN apt-get update && apt-get install -y \
     git \
     curl \
     tree \
+    wget \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install GitHub CLI
+RUN curl -fsSL https://cli.github.com/packages/githubcli-archive-keyring.gpg | dd of=/usr/share/keyrings/githubcli-archive-keyring.gpg \
+    && chmod go+r /usr/share/keyrings/githubcli-archive-keyring.gpg \
+    && echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/githubcli-archive-keyring.gpg] https://cli.github.com/packages stable main" | tee /etc/apt/sources.list.d/github-cli.list > /dev/null \
+    && apt-get update \
+    && apt-get install -y gh \
     && rm -rf /var/lib/apt/lists/*
 
 # Create a non-root user for the agent to run as