Fix battle auto-detection and overlay position switching

- game-bridge.js: Replace broken Phaser.GAMES discovery (tree-shaken by
  Vite) with SceneManager.prototype.update monkey-patch that captures the
  game instance on the next frame tick
- manifest.json: Run game-bridge at document_start so the patch is
  installed before Phaser boots
- content.js: Fix position buttons only working once — was using inline
  style.left presence as drag check, now uses a dedicated manuallyDragged
  flag that only sets on actual mouse drag and resets on popup position
  change
- Bump version to 1.1.0

content.js

@@ -31,6 +31,7 @@
   let currentBattleState = null;
   let overlayEl = null;
   let statusText = 'Waiting for game...';
+  let manuallyDragged = false;
 
   // ─── Settings Management ───────────────────────────────────────────
 
@@ -49,7 +50,13 @@
 
   function onSettingsChanged(changes) {
     if (changes.settings) {
+      const oldPosition = settings.position;
       settings = { ...settings, ...changes.settings.newValue };
+      // If position changed via storage, reset drag and force reposition
+      if (settings.position !== oldPosition) {
+        manuallyDragged = false;
+        if (overlayEl) applyPosition(true);
+      }
       updateOverlay();
     }
   }
@@ -72,7 +79,13 @@
         settings
       });
     } else if (msg.type === 'UPDATE_SETTINGS') {
+      const resetPos = msg.settings._resetPosition;
+      delete msg.settings._resetPosition;
       settings = { ...settings, ...msg.settings };
+      if (resetPos) {
+        manuallyDragged = false;
+        if (overlayEl) applyPosition(true);
+      }
       updateOverlay();
       sendResponse({ ok: true });
     } else if (msg.type === 'REQUEST_REFRESH') {
@@ -150,6 +163,7 @@
       el.style.top = (origY + dy) + 'px';
       el.style.right = 'auto';
       el.style.bottom = 'auto';
+      manuallyDragged = true;
     });
 
     document.addEventListener('mouseup', () => {
@@ -183,11 +197,12 @@
     }
   }
 
-  function applyPosition() {
+  function applyPosition(force) {
     if (!overlayEl) return;
-    // Only apply position if not manually dragged
-    if (overlayEl.style.left && overlayEl.style.left !== 'auto') return;
+    // Skip if user manually dragged the overlay (unless forced by popup)
+    if (manuallyDragged && !force) return;
 
+    // Clear all position styles
     overlayEl.style.right = '';
     overlayEl.style.left = '';
     overlayEl.style.top = '';