fix(render): no torch-flame on the tavern player + repaint when the tile atlas loads

Two tavern rendering bugs in Tiled mode:

1. The 'you' cell looked like a flaming dot. The warm torch light + drifting
   embers are a DUNGEON effect (the player carries the torch) but _composite/
   _ensureEmbers ran on every scene, so in the tavern they painted a flame on
   the 'you' avatar while other players rendered normally. Gate both to
   scene.isDungeon.

2. Tavern tiles showed as flat 'blocks' that never refreshed. The tile atlas
   image loads async; switching INTO the tiled renderer (e.g. entering the
   tavern) before it's ready paints the flat-colour fallback once and never
   repaints until the next scene update. Hook atlas.onReady to re-render the
   last scene the moment the atlas is ready.

Client-only; no server change. Deploy = git pull + restart (or just pull, it's
static assets).

html/js/render/tileRenderer.js

@@ -86,6 +86,16 @@
         var tmap = (window.RK && RK.tileMap) ? RK.tileMap() : {};
         var useAtlas = !!(atlas && atlas.ready);
 
+        // The atlas image loads async. If you switch INTO this renderer (e.g. entering the tavern
+        // in Tiled mode) before it's ready, the first paint uses the flat-colour fallback — which
+        // looks like plain blocks. Without a re-render it stays stuck there until the next scene
+        // update. Hook the atlas so we repaint the moment it's ready.
+        if (atlas && !atlas.ready && !this._atlasHooked && typeof atlas.onReady === 'function') {
+            this._atlasHooked = true;
+            var self = this;
+            atlas.onReady(function () { if (self.ctx && self._lastScene) self.render(self._lastScene); });
+        }
+
         if (!scene.isDungeon && window.RK && RK.roomReady && RK.roomReady()) {
             // A designed room (imported .tmx) is loaded — draw its layered tiles.
             RK.drawRoomCanvas(ctx, cell);
@@ -278,6 +288,9 @@
     };
 
     TileRenderer.prototype._ensureEmbers = function (scene) {
+        // Embers belong to the dungeon torch the player carries — never in the tavern (or any
+        // non-dungeon scene), where they'd make the "you" avatar look like a flaming dot.
+        if (!scene || !scene.isDungeon) { this._embers = []; return; }
         var p = findPlayer(scene);
         if (!p) { this._embers = []; return; }
         if (this._embers.length) return;
@@ -320,7 +333,9 @@
         var ctx = this.ctx;
         if (!ctx) return;
         var w = this.canvas.width, h = this.canvas.height, cell = this.cell;
-        var p = findPlayer(scene);
+        // The warm torch light + embers are a DUNGEON effect (the player carries the torch). In the
+        // tavern there's no torch, so skip it — otherwise the "you" cell glows like a flaming dot.
+        var p = (scene && scene.isDungeon) ? findPlayer(scene) : null;
         if (p) {
             var cx = p.x * cell + cell / 2, cy = p.y * cell + cell / 2;
             var flick = 1 + Math.sin(this._t * 0.18) * 0.08 + Math.sin(this._t * 0.5 + 1.3) * 0.04;