fix: correct traefik route label escaping

Path-based route rules for traefik kept a stray backslash before each backtick, so traefik rejected the router and requests fell through to the web process. The nginx template tests now also supply the route variables and cover route rendering.

plugins/traefik-vhosts/internal-functions

@@ -23,8 +23,7 @@ fn-traefik-route-labels() {
     service_name="${APP}-${route_proc}-${route_slug}"
     path_len="${#route_path}"
 
-    # Triple-backslash for the same eval-survival reason as fn-traefik-host-rule.
-    local rule="PathPrefix(\\\`${route_path}\\\`)"
+    local rule="PathPrefix(\`${route_path}\`)"
     if [[ -n "$host_rule" ]]; then
       rule="(${host_rule}) && ${rule}"
     fi
@@ -78,17 +77,12 @@ fn-traefik-host-rule() {
     return
   fi
 
-  # Backticks must be double-escaped so they survive the docker-args eval
-  # path. A single backslash leaves a bare backtick in the final string,
-  # which then runs as a command substitution at eval time and breaks the
-  # docker run invocation. Triple-backslash matches the existing emission
-  # convention used by docker-args-process-deploy.
   for domain in $(echo "$app_domains" | xargs); do
     if [[ -z "$result" ]]; then
-      result="Host(\\\`${domain}\\\`)"
+      result="Host(\`${domain}\`)"
       continue
     fi
-    result="${result} || Host(\\\`${domain}\\\`)"
+    result="${result} || Host(\`${domain}\`)"
   done
   echo "$result"
 }