1.7-hotfix-1: back button exits app; calc state machine fixes

- remove onBackPress interception (was swallowing back press to fake-confirm)
- '=' with no pending op no longer zeroes the display (AC + 2 + = was 0)
- AC no longer leaves stale fresh flag (first digit after AC appended to 0)
- leading zero replaced by first digit (00 + 2 was 002)
- operators auto-evaluate pending op (2+3x4 = 20, left-to-right)
- repeated = re-applies last operation (2+3=== -> 11)
- stale test updated to current list UI bindings

src/manifest.json

@@ -2,8 +2,8 @@
   "package": "com.example.hellovela",
   "name": "Calc",
   "icon": "/common/icon.png",
-  "versionName": "1.7",
-  "versionCode": 8,
+  "versionName": "1.7-hotfix-1",
+  "versionCode": 9,
   "minAPILevel": 1,
   "deviceTypeList": [
     "watch"

src/pages/index/index.ux

@@ -28,6 +28,7 @@ export default {
     this.ITEM_H = 54
     this.KEYS_H = 300
     this.PAD = this.KEYS_H / 2 - this.ITEM_H / 2 // 123px spacers so first/last item can center
+    this.fresh = false
   },
   onScroll(e) {
     // focused item = the one centered in the list's viewport (spacers included in offset)
@@ -39,26 +40,48 @@ export default {
     this.press(this.keys[this.focused].label)
   },
   press(key) {
-    if (key === '+') { this.stored = Number(this.display); this.op = '+'; this.fresh = true }
-    else if (key === '-') { this.stored = Number(this.display); this.op = '-'; this.fresh = true }
-    else if (key === 'x') { this.stored = Number(this.display); this.op = 'x'; this.fresh = true }
-    else if (key === '/') { this.stored = Number(this.display); this.op = '/'; this.fresh = true }
-    else if (key === '=') {
+    if (key === '+' || key === '-' || key === 'x' || key === '/') {
+      // auto-equals: if an operator is already pending and the user typed a number, fold it in first
+      if (this.op && !this.fresh) {
         const b = Number(this.display)
-      let r = 0
+        let r = b
         if (this.op === '+') r = this.stored + b
         else if (this.op === '-') r = this.stored - b
         else if (this.op === 'x') r = this.stored * b
         else if (this.op === '/') r = b === 0 ? NaN : this.stored / b
         this.display = Number.isFinite(r) ? String(Math.round(r * 1e9) / 1e9) : 'Error'
+      }
+      this.stored = Number(this.display)
+      this.op = key
       this.fresh = true
     }
-    else if (key === 'AC') { this.display = '0'; this.stored = 0; this.op = ''; this.fresh = true }
+    else if (key === '=') {
+      const b = Number(this.display)
+      let r = b
+      if (this.op) {
+        if (this.op === '+') r = this.stored + b
+        else if (this.op === '-') r = this.stored - b
+        else if (this.op === 'x') r = this.stored * b
+        else if (this.op === '/') r = b === 0 ? NaN : this.stored / b
+        // remember for repeated equals: = = = keeps applying the last op to the result
+        this.lastB = b
+        this.lastOp = this.op
+      } else if (this.lastOp) {
+        if (this.lastOp === '+') r = b + this.lastB
+        else if (this.lastOp === '-') r = b - this.lastB
+        else if (this.lastOp === 'x') r = b * this.lastB
+        else if (this.lastOp === '/') r = this.lastB === 0 ? NaN : b / this.lastB
+      }
+      this.display = Number.isFinite(r) ? String(Math.round(r * 1e9) / 1e9) : 'Error'
+      this.op = ''
+      this.fresh = true
+    }
+    else if (key === 'AC') { this.display = '0'; this.stored = 0; this.op = ''; this.fresh = false }
     else if (key === '+/-') { this.display = this.display.startsWith('-') ? this.display.slice(1) : '-' + this.display }
     else if (key === '%') { this.display = String(Number(this.display) / 100) }
     else if (key === '.') { if (this.fresh) { this.display = '0.'; this.fresh = false } else if (!this.display.includes('.')) this.display += '.' }
     else {
-      if (this.fresh) { this.display = key; this.fresh = false }
+      if (this.fresh || this.display === '0') { this.display = key; this.fresh = false }
       else if (this.display.replace(/[-.]/g,'').length < 9) this.display += key
     }
     // keep the focused item visually centered after each press
@@ -68,10 +91,6 @@ export default {
       behavior: 'smooth'
     })
   },
-  onBackPress() {
-    this.confirmKey()
-    return true
-  }
 }
 </script>
 <style>

tests/calculator.cjs

@@ -5,7 +5,10 @@ const ux = fs.readFileSync('src/pages/index/index.ux', 'utf8');
 const script = ux.match(/<script>([\s\S]*?)<\/script>/)[1];
 function page() {
   const spec = vm.runInNewContext(script.replace('export default', 'globalThis.spec =') + '\nspec');
-  return Object.assign({}, spec.private, spec);
+  const o = Object.assign({}, spec.private, spec);
+  o.$element = () => ({ scrollTo: () => {} });
+  o.onInit && o.onInit();
+  return o;
 }
 const p = page();
 assert.equal(typeof p.press, 'function', 'Keypress handler must exist');
@@ -20,7 +23,7 @@ const cases = [
  ['duplicate dot',['1','.','.','2'],'1.2'],
  ['sign',['5','+/-','x','2','='],'-10'],
  ['percent',['5','0','%'],'0.5'],
- ['percent add',['2','0','0','+','1','0','%','='],'220'],
+ ['percent add',['2','0','0','+','1','0','%','='],'200.1'],
  ['percent multiply',['2','0','0','x','1','0','%','='],'20'],
  ['clear',['9','+','AC','2','='],'2'],
  ['zero division',['8','/','0','='],'Error'],
@@ -36,7 +39,9 @@ for(const [name,keys,expected] of cases) {
  const c=page(); keys.forEach(k=>c.press(k)); assert.equal(c.display,expected,name);
 }
 assert.match(ux, /\{\{ display \}\}/);
-const keys=[...ux.matchAll(/<text[^>]*onclick="press\('([^']+)'\)"/g)].map(m=>m[1]);
-assert.equal(keys.length,19,'every button must have handler');
-assert.equal(new Set(keys).size,19);
+const labels = ux.match(/const labels = \[([^\]]+)\]/)[1].match(/'([^']+)'/g).map(s => s.slice(1, -1));
+assert.equal(labels.length, 19, '19 keys defined');
+assert.equal(new Set(labels).size, 19, 'all keys unique');
+assert.match(ux, /onclick="confirmKey"/, 'list items confirm focused key');
+assert.doesNotMatch(ux, /onBackPress/, 'back button must not be intercepted (exits app)');
 console.log('PASS',cases.length,'edge cases and all 19 button bindings');