Fix build issues

src/components/Scratch.vue

@@ -2,15 +2,20 @@
   import {MathPage} from '../support/page'
   import {v4 as uuidv4} from 'uuid'
   import Statement from './Statement.vue'
+  import {MathStatement} from '../support/parse'
 
   const page = new MathPage(uuidv4())
   const stmt1Id = page.addRaw('x = y+3/4')
   const stmt2Id = page.addRaw('y = 9')
   const evaluation = page.evaluate()
+
+  const stmt = page.getStatement(stmt1Id)
   console.log({page, stmt1Id})
+
+  const onEdit = (stmt: MathStatement) => () => console.log('edit', stmt)
 </script>
 
 <template>
   <p>Scratch page for testing!</p>
-  <Statement :statement="page.getStatement(stmt1Id)" :evaluation="evaluation"/>
+  <Statement v-if="stmt" :statement="stmt" :evaluation="evaluation"/>
 </template>

src/components/Statement.vue

@@ -30,6 +30,7 @@ computed(() => value = getValueStatement())
 
 <template>
   <div class="math-statement">
+
     <Katex :statement="statement" size="big"/>
     <div class="result" v-if="value">
       <hr v-if="value" style="border: 1px solid #ccc; border-bottom: 0">