fix: repair deploy pipeline — boolean type and unterminated quoted string

- Changed no_cache input type from boolean to string (Gitea 1.26.3 compat)
- Fixed multi-line double-quoted string in DEPLOYSCRIPT heredoc
- Hardened inputs.* references with proper short-circuit fallbacks

.gitea/workflows/deploy.yaml

@@ -41,10 +41,10 @@ on:
         default: ''
         type: string
       no_cache:
-        description: 'Disable Docker build cache'
+        description: 'Disable Docker build cache (true/false)'
         required: false
-        default: false
-        type: boolean
+        default: 'false'
+        type: string
       git_ref:
         description: 'Git ref to deploy (branch, tag, or commit SHA; default: main)'
         required: false
@@ -212,14 +212,15 @@ jobs:
           set -euo pipefail
 
           # Auto-deploy: always use cache. Manual: respect no_cache input.
-          NO_CACHE="${{ github.event_name == 'workflow_dispatch' && inputs.no_cache || false }}"
           BUILD_ARGS=""
-          if [ "$NO_CACHE" = "true" ]; then
-            BUILD_ARGS="--no-cache"
+          SERVICE_ARG=""
+          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
+            if [ "${{ github.event_name == 'workflow_dispatch' && inputs.no_cache || 'false' }}" = "true" ]; then
+              BUILD_ARGS="--no-cache"
+            fi
+            SERVICE_ARG="${{ github.event_name == 'workflow_dispatch' && inputs.service || '' }}"
           fi
 
-          SERVICE_ARG="${{ github.event_name == 'workflow_dispatch' && inputs.service || '' }}"
-
           # Write the deploy script to a file to avoid nested quoting issues
           cat > /tmp/nexus-deploy-script.sh << 'DEPLOYSCRIPT'
 #!/bin/sh
@@ -235,13 +236,9 @@ docker rm -f nexus-postgres-1 nexus-api-1 nexus-web-1 2>/dev/null || true
 PG_VOL=$(docker volume ls -q --filter name=nexus-postgres 2>/dev/null | head -1)
 if [ -n "$PG_VOL" ]; then
   echo "Checking postgres WAL integrity..."
-  docker run --rm -v "$PG_VOL:/var/lib/postgresql/data" \
-    --entrypoint sh postgres:17-alpine -c "
-      echo 'Resetting WAL...'
-      pg_resetwal -f /var/lib/postgresql/data && echo 'WAL reset OK'
-    " 2>&1 || echo 'pg_resetwal failed (may be benign)'
+  docker run --rm -v "$PG_VOL:/var/lib/postgresql/data" --entrypoint sh postgres:17-alpine -c "pg_resetwal -f /var/lib/postgresql/data && echo 'WAL reset OK'" 2>&1 || echo "pg_resetwal failed (may be benign)"
 else
-  echo 'Postgres volume not found - will be created fresh'
+  echo "Postgres volume not found - will be created fresh"
 fi
 
 BUILD_ARGS="${DEPLOY_BUILD_ARGS:-}"