fix(mosaic): harden gitea pr wrapper metadata

packages/mosaic/framework/tools/git/detect-platform.sh

@@ -92,7 +92,7 @@ get_remote_host() {
 }
 
 # Resolve a Gitea API token for the given host.
-# Priority: Mosaic credential loader → GITEA_TOKEN env → ~/.git-credentials
+# Priority: Mosaic credential loader → host-matched GITEA_TOKEN env → ~/.git-credentials
 get_gitea_token() {
     local host="$1"
     local script_dir
@@ -103,16 +103,28 @@ get_gitea_token() {
     if [[ -f "$cred_loader" ]]; then
         local token
         token=$(
+            # shellcheck source=/dev/null
             source "$cred_loader"
+            # Host-specific wrapper resolution must not inherit a caller/global GITEA_TOKEN.
+            # load_credentials intentionally preserves existing env vars for interactive use,
+            # but merge/metadata wrappers need the token matching the remote host.
+            unset GITEA_TOKEN GITEA_URL
             case "$host" in
                 git.mosaicstack.dev) load_credentials gitea-mosaicstack 2>/dev/null ;;
                 git.uscllc.com)      load_credentials gitea-usc 2>/dev/null ;;
                 *)
+                    local matched=false
                     for svc in gitea-mosaicstack gitea-usc; do
-                        load_credentials "$svc" 2>/dev/null || continue
-                        [[ "${GITEA_URL:-}" == *"$host"* ]] && break
                         unset GITEA_TOKEN GITEA_URL
+                        load_credentials "$svc" 2>/dev/null || continue
+                        if [[ "${GITEA_URL:-}" == "https://$host" || "${GITEA_URL:-}" == "http://$host" || "${GITEA_URL:-}" == *"//$host" ]]; then
+                            matched=true
+                            break
+                        fi
                     done
+                    if [[ "$matched" != true ]]; then
+                        unset GITEA_TOKEN GITEA_URL
+                    fi
                     ;;
             esac
             echo "${GITEA_TOKEN:-}"
@@ -123,10 +135,12 @@ get_gitea_token() {
         fi
     fi
 
-    # 2. GITEA_TOKEN env var (may be set by caller)
+    # 2. GITEA_TOKEN env var (only when GITEA_URL, if present, matches the remote host)
     if [[ -n "${GITEA_TOKEN:-}" ]]; then
-        echo "$GITEA_TOKEN"
-        return 0
+        if [[ -z "${GITEA_URL:-}" || "${GITEA_URL:-}" == "https://$host" || "${GITEA_URL:-}" == "http://$host" || "${GITEA_URL:-}" == *"//$host" ]]; then
+            echo "$GITEA_TOKEN"
+            return 0
+        fi
     fi
 
     # 3. ~/.git-credentials file