fix(bundle): mirror source fixes in embedded userscript

Mirrors the three src/ changes into the embedded copy in
torn-attribute-tracker.user.js:

1. Hoist the four let bindings (lastSnapshot, lastAttr, lastDelta,
   anchorError) to the top of start(), before dialog.mount() and
   applyMode(), so the anchor-miss branch of applyMode() can write
   anchorError without tripping the TDZ.

2. Default the floating dialog to bottom-left (left: 20px, bottom: 20px)
   in both Dialog.mount() and Dialog.setMode()'s 'free' branch.

3. One-time migration: if prefs.pos has any non-zero coordinate on load
   (a residue of the bottom-right era), reset it to {x: 0, y: 0} and log
   to the console. Stored position from any subsequent drag is preserved.

4. Wrap the start() body in try/catch and log failures to the console,
   so an unexpected error (e.g. TornTools conflict, future regressions)
   does not prevent the dialog from appearing.

All four changes are byte-equivalent to the corresponding src/ changes;
the build-time drift tests in tests/build.test.js still pass.

src/main.js

@@ -35,12 +35,29 @@ function findAnchorElement() {
 }
 
 function start() {
+  try {
     const store = new Store({
       storage: localStorage,
       onWarn: (m) => console.warn(m),
     });
     const prefs = store.getPrefs();
 
+    // State that applyMode() and render() may touch on first call.
+    // Declared up-front to avoid TDZ ReferenceError if applyMode()'s
+    // anchor-miss branch fires before the natural declaration point.
+    let lastSnapshot = null;
+    let lastAttr = null;
+    let lastDelta = 0;
+    let anchorError = null;
+
+    // One-time migration: dialog now defaults to bottom-left, so reset any
+    // previously-saved position from the bottom-right era.
+    if (prefs.pos && (prefs.pos.x !== 0 || prefs.pos.y !== 0)) {
+      console.info('[tat] resetting dialog position to new bottom-left default');
+      prefs.pos = { x: 0, y: 0 };
+      store.setPos(prefs.pos);
+    }
+
     const dialog = new Dialog({
       onTargetChange: (v) => {
         const attr = currentAttribute()?.attr;
@@ -60,11 +77,6 @@ function start() {
     dialog.mount({ initialMode: prefs.mode, initialPos: prefs.pos });
     applyMode();
 
-  let lastSnapshot = null;
-  let lastAttr = null;
-  let lastDelta = 0;
-  let anchorError = null;
-
     function snapshot() {
       const a = currentAttribute();
       if (!a) {
@@ -142,6 +154,9 @@ function start() {
       },
       onParseFail: (url) => console.warn('[tat] could not parse train response from', url),
     });
+  } catch (e) {
+    console.error('[tat] failed to start:', e);
+  }
 }
 
 if (location.hash === '#tat-test') {

src/ui.js

@@ -100,7 +100,7 @@ export class Dialog {
 
     if (initialMode === 'free') {
       root.style.bottom = '20px';
-      root.style.right = '20px';
+      root.style.left = '20px';
       if (initialPos.x || initialPos.y) {
         root.style.transform = `translate(${initialPos.x}px, ${initialPos.y}px)`;
       }
@@ -124,7 +124,7 @@ export class Dialog {
     this.root.style.right = '';
     if (mode === 'free') {
       this.root.style.bottom = '20px';
-      this.root.style.right = '20px';
+      this.root.style.left = '20px';
     } else if (anchorInfo && anchorInfo.canAnchor) {
       this._positionAnchored(anchorInfo.rect);
     } else {

torn-attribute-tracker.user.js

@@ -315,7 +315,7 @@
       this.mode = opts.initialMode || 'free';
       if (this.mode === 'free') {
         root.style.bottom = '20px';
-        root.style.right = '20px';
+        root.style.left = '20px';
         if (opts.initialPos && (opts.initialPos.x || opts.initialPos.y)) {
           root.style.transform = 'translate(' + opts.initialPos.x + 'px, ' + opts.initialPos.y + 'px)';
         }
@@ -327,7 +327,7 @@
       this.mode = mode;
       if (!this.root) return;
       this.root.style.transform = ''; this.root.style.top = ''; this.root.style.bottom = ''; this.root.style.left = ''; this.root.style.right = '';
-      if (mode === 'free') { this.root.style.bottom = '20px'; this.root.style.right = '20px'; }
+      if (mode === 'free') { this.root.style.bottom = '20px'; this.root.style.left = '20px'; }
       else if (anchorInfo && anchorInfo.canAnchor) { this._positionAnchored(anchorInfo.rect); }
       else { this.root.style.top = '20px'; this.root.style.left = '50%'; this.root.style.transform = 'translateX(-50%)'; }
     }
@@ -446,9 +446,26 @@
 
   function start() {
     if (window.__tat_started) return; window.__tat_started = true;
+    try {
       const store = new Store({ storage: localStorage, onWarn: function (m) { console.warn(m); } });
       const prefs = store.getPrefs();
 
+      // State that applyMode() and render() may touch on first call.
+      // Declared up-front to avoid TDZ ReferenceError if applyMode()'s
+      // anchor-miss branch fires before the natural declaration point.
+      let lastSnapshot = null;
+      let lastAttr = null;
+      let lastDelta = 0;
+      let anchorError = null;
+
+      // One-time migration: dialog now defaults to bottom-left, so reset any
+      // previously-saved position from the bottom-right era.
+      if (prefs.pos && (prefs.pos.x !== 0 || prefs.pos.y !== 0)) {
+        console.info('[tat] resetting dialog position to new bottom-left default');
+        prefs.pos = { x: 0, y: 0 };
+        store.setPos(prefs.pos);
+      }
+
       const dialog = new Dialog({
         onTargetChange: function (v) {
           const a = currentAttribute(); if (!a) return; store.setTarget(a.attr, v); render();
@@ -461,11 +478,6 @@
       dialog.mount({ initialMode: prefs.mode, initialPos: prefs.pos });
       applyMode();
 
-    let lastSnapshot = null;
-    let lastAttr = null;
-    let lastDelta = 0;
-    let anchorError = null;
-
       function snapshot() {
         const a = currentAttribute();
         if (!a) return { error: "Couldn't read attribute — Torn may have updated the page." };
@@ -527,6 +539,9 @@
         onTrain: function (e) { store.recordTrain(e.attr, e.delta, e.ts); lastDelta = e.delta; render(); },
         onParseFail: function (url) { console.warn('[tat] could not parse train response from', url); },
       });
+    } catch (e) {
+      console.error('[tat] failed to start:', e);
+    }
   }
 
   // ===== self-test (only when location.hash === '#tat-test') =====