chore(deps): update dependencies

- Add `@std/fmt@1.0.3` dependency
- Update `@anthropic-ai/sdk` to `0.30.0`
- Update `chalk` to `5.3.0`
- Add checks for required dependencies and GitHub CLI authentication in the install script

main.ts

@@ -759,7 +759,7 @@ async function searchAndSelectIssue(): Promise<{ number: number, title: string }
     }
 
     console.log(`\n${COLORS.header("Found issues:")}`);
-    console.log('┌──────┬────────┬───────────────────────��──────────────────────────────────┐');
+    console.log('┌──────┬────────┬──────────────────────────────────────────────────────────┐');
     console.log('│ Sel# │ ID     │ Title                                                    │');
     console.log('├──────┼────────┼──────────────────────────────────────────────────────────┤');
 

scripts/install.sh

@@ -2,6 +2,20 @@
 set -e
 
 main() {
+    # Check for required dependencies
+    if ! command -v gh &> /dev/null; then
+        echo "GitHub CLI (gh) is required but not found."
+        echo "Install instructions: https://cli.github.com/manual/installation"
+        exit 1
+    }
+
+    # Check if gh is authenticated
+    if ! gh auth status &> /dev/null; then
+        echo "GitHub CLI is not authenticated. Please run:"
+        echo "  gh auth login"
+        exit 1
+    fi
+
     BIN_DIR=${BIN_DIR-"$HOME/.bin"}
     mkdir -p $BIN_DIR