Fix Gitea wrapper login resolution (#538)

packages/mosaic/framework/tools/git/pr-diff.sh

@@ -11,6 +11,7 @@ source "$SCRIPT_DIR/detect-platform.sh"
 PR_NUMBER=""
 OUTPUT_FILE=""
 REPO_OVERRIDE=""
+HOST_OVERRIDE=""
 
 while [[ $# -gt 0 ]]; do
     case $1 in
@@ -26,12 +27,17 @@ while [[ $# -gt 0 ]]; do
             REPO_OVERRIDE="$2"
             shift 2
             ;;
+        --host)
+            HOST_OVERRIDE="$2"
+            shift 2
+            ;;
         -h|--help)
-            echo "Usage: pr-diff.sh -n <pr_number> [-r owner/repo] [-o <output_file>]"
+            echo "Usage: pr-diff.sh -n <pr_number> [-r owner/repo] [--host host] [-o <output_file>]"
             echo ""
             echo "Options:"
             echo "  -n, --number   PR number (required)"
             echo "  -r, --repo     Repository slug (default: infer from git origin)"
+            echo "      --host     Gitea host for --repo API calls (or set GITEA_HOST/GITEA_URL)"
             echo "  -o, --output   Output file (optional, prints to stdout if omitted)"
             echo "  -h, --help     Show this help"
             exit 0
@@ -69,16 +75,28 @@ if [[ "$PLATFORM" == "github" ]]; then
     fi
 elif [[ "$PLATFORM" == "gitea" ]]; then
     # tea doesn't have a direct diff command — use the API
-    HOST=$(get_remote_host 2>/dev/null || echo "git.mosaicstack.dev")
+    if [[ -n "$HOST_OVERRIDE" ]]; then
+        HOST="$HOST_OVERRIDE"
+    elif [[ -n "$REPO_OVERRIDE" ]]; then
+        HOST=$(get_gitea_api_host_for_repo_override) || {
+            echo "Error: Gitea host is required with --repo. Pass --host or set GITEA_HOST/GITEA_URL." >&2
+            exit 1
+        }
+    else
+        HOST=$(get_remote_host) || {
+            echo "Error: Could not determine Gitea host from git origin." >&2
+            exit 1
+        }
+    fi
 
     DIFF_URL="https://${HOST}/api/v1/repos/${REPO_INFO}/pulls/${PR_NUMBER}.diff"
 
     GITEA_API_TOKEN=$(get_gitea_token "$HOST" || true)
 
     if [[ -n "$GITEA_API_TOKEN" ]]; then
-        DIFF_CONTENT=$(curl -sS -H "Authorization: token $GITEA_API_TOKEN" "$DIFF_URL")
+        DIFF_CONTENT=$(curl -sS -H "User-Agent: curl/8" -H "Authorization: token $GITEA_API_TOKEN" "$DIFF_URL")
     else
-        DIFF_CONTENT=$(curl -sS "$DIFF_URL")
+        DIFF_CONTENT=$(curl -sS -H "User-Agent: curl/8" "$DIFF_URL")
     fi
 
     if [[ -n "$OUTPUT_FILE" ]]; then