Fix setup.sh failures and improve user experience (#6)

Five improvements to the setup wizard:

1. Relative path handling:
   Convert relative paths to absolute paths after user input to prevent
   failures when `claude init` changes the working directory.

2. Git push error handling:
   Detect actual branch name and show real errors instead of suppressing
   them and falling back to non-existent `master`.

3. Interactive push recovery:
   When push fails (e.g., remote has existing content), offer interactive
   options: force push with confirmation, or skip with manual command.

4. GitHub Actions setup after failed push:
   Only copy workflow files if push succeeds to avoid confusion.

5. OAuth token setup guidance:
   Replace cryptic "Remember to add CLAUDE_CODE_OAUTH_TOKEN" with:
   - Step-by-step instructions
   - Direct link to token documentation
   - Link to repository secrets page
   - Option to open setup page in browser

Co-authored-by: eiszazel <eiszazel@users.noreply.github.com>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

scripts/setup.sh

@@ -80,6 +80,11 @@ VAULT_PATH=${VAULT_PATH:-$DEFAULT_VAULT}
 # Expand tilde if present
 VAULT_PATH="${VAULT_PATH/#\~/$HOME}"
 
+# Convert to absolute path if relative
+if [[ "$VAULT_PATH" != /* ]]; then
+    VAULT_PATH="$(pwd)/$VAULT_PATH"
+fi
+
 # Check if directory exists
 if [ -d "$VAULT_PATH" ]; then
     print_warning "Directory already exists: $VAULT_PATH"
@@ -180,16 +185,77 @@ if [[ $REPLY =~ ^[Yy]$ ]]; then
         
         read -p "Push to GitHub now? (y/n): " -n 1 -r
         echo
+        PUSH_SUCCESS=false
         if [[ $REPLY =~ ^[Yy]$ ]]; then
-            git push -u origin main 2>/dev/null || git push -u origin master
+            # Get current branch name
+            CURRENT_BRANCH=$(git branch --show-current)
+            if git push -u origin "$CURRENT_BRANCH" 2>&1; then
                 print_success "Pushed to GitHub"
+                PUSH_SUCCESS=true
+            else
+                print_warning "Push failed - the remote repository may already have content"
+                echo ""
+                echo "How would you like to proceed?"
+                echo "  1) Force push (overwrites remote content - use for fresh vault repos)"
+                echo "  2) Skip (push manually later)"
+                read -p "Choose [1/2]: " -n 1 -r PUSH_CHOICE
+                echo ""
+
+                case $PUSH_CHOICE in
+                    1)
+                        print_warning "Force pushing will overwrite any existing content in the remote repository"
+                        read -p "Are you sure? (y/n): " -n 1 -r
+                        echo
+                        if [[ $REPLY =~ ^[Yy]$ ]]; then
+                            if git push -u origin "$CURRENT_BRANCH" --force; then
+                                print_success "Force pushed to GitHub"
+                                PUSH_SUCCESS=true
+                            else
+                                print_error "Force push failed"
+                            fi
+                        else
+                            print_info "Skipping push"
+                        fi
+                        ;;
+                    *)
+                        print_info "Skipping push. You can push manually later with:"
+                        echo "  cd \"$VAULT_PATH\" && git push -u origin $CURRENT_BRANCH"
+                        ;;
+                esac
+            fi
         fi
 
-        # Set up GitHub Action
+        # Set up GitHub Action only if push succeeded
+        if [ "$PUSH_SUCCESS" = true ]; then
             mkdir -p "$VAULT_PATH/.github/workflows"
             cp "$SCRIPT_DIR/../github-actions/claude.yml" "$VAULT_PATH/.github/workflows/"
             print_success "GitHub Action workflow copied"
-        print_warning "Remember to add CLAUDE_CODE_OAUTH_TOKEN to repository secrets"
+
+            echo ""
+            print_warning "GitHub Actions requires a Claude Code OAuth token to work"
+            echo ""
+            echo "To set up the token:"
+            echo "  1. Get your token from: https://code.claude.com/docs/en/github-actions"
+            echo "  2. Go to your repo: $GITHUB_URL/settings/secrets/actions"
+            echo "  3. Click 'New repository secret'"
+            echo "  4. Name: CLAUDE_CODE_OAUTH_TOKEN"
+            echo "  5. Value: [paste your token]"
+            echo ""
+
+            # Offer to open the setup page
+            read -p "Open token setup page in browser? (y/n): " -n 1 -r
+            echo
+            if [[ $REPLY =~ ^[Yy]$ ]]; then
+                TOKEN_URL="https://code.claude.com/docs/en/github-actions"
+                if command_exists xdg-open; then
+                    xdg-open "$TOKEN_URL" 2>/dev/null || print_info "Visit: $TOKEN_URL"
+                elif command_exists open; then
+                    open "$TOKEN_URL" 2>/dev/null || print_info "Visit: $TOKEN_URL"
+                else
+                    print_info "Visit: $TOKEN_URL"
+                fi
+            fi
+        fi
     fi
 fi