milestone 19: hygiene sweep - dead ecs surface, single-source constants, tls classification, frontend state hazards, docker smoke network fix

src/web/server.zig

@@ -156,6 +156,9 @@ pub const WebState = struct {
     querylog_db: ?*db.Db = null,
 
     version: []const u8 = "",
+    /// The `--web-dev` asset directory, read by the dev-mode fallback. Empty
+    /// whenever that fallback is not wired.
+    dev_dir: []const u8 = "",
     /// Unix seconds at process start, for uptime.
     started_unix: i64 = 0,