centralize guides and rails under mosaic with runtime compatibility links

rails/git/issue-view.sh

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+#!/bin/bash
+# issue-view.sh - View issue details on GitHub or Gitea
+# Usage: issue-view.sh -i <issue_number>
+
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+source "$SCRIPT_DIR/detect-platform.sh"
+
+# Parse arguments
+ISSUE_NUMBER=""
+
+while [[ $# -gt 0 ]]; do
+    case $1 in
+        -i|--issue)
+            ISSUE_NUMBER="$2"
+            shift 2
+            ;;
+        -h|--help)
+            echo "Usage: issue-view.sh -i <issue_number>"
+            echo ""
+            echo "Options:"
+            echo "  -i, --issue    Issue number (required)"
+            echo "  -h, --help     Show this help"
+            exit 0
+            ;;
+        *)
+            echo "Unknown option: $1"
+            exit 1
+            ;;
+    esac
+done
+
+if [[ -z "$ISSUE_NUMBER" ]]; then
+    echo "Error: Issue number is required (-i)"
+    exit 1
+fi
+
+detect_platform
+
+if [[ "$PLATFORM" == "github" ]]; then
+    gh issue view "$ISSUE_NUMBER"
+elif [[ "$PLATFORM" == "gitea" ]]; then
+    tea issue "$ISSUE_NUMBER"
+else
+    echo "Error: Unknown platform"
+    exit 1
+fi