Fix autocomplete dropdown clipped by overflow container; use fixed positioning

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

ui/src/pages/Mappings.jsx

@@ -4,6 +4,7 @@ import { api, authHeaders } from '../api'
 function AutocompleteInput({ value, onChange, onEnter, suggestions = [], className, placeholder }) {
   const [open, setOpen] = useState(false)
   const [highlighted, setHighlighted] = useState(0)
+  const [dropPos, setDropPos] = useState(null)
   const inputRef = useRef()
   const listRef = useRef()
 
@@ -12,6 +13,10 @@ function AutocompleteInput({ value, onChange, onEnter, suggestions = [], classNa
     : suggestions
 
   function openList() {
+    if (inputRef.current) {
+      const r = inputRef.current.getBoundingClientRect()
+      setDropPos({ top: r.bottom + 2, left: r.left, minWidth: r.width })
+    }
     setOpen(true)
     setHighlighted(0)
   }
@@ -42,7 +47,6 @@ function AutocompleteInput({ value, onChange, onEnter, suggestions = [], classNa
     if (e.key === 'Enter') onEnter?.()
   }
 
-  // Scroll highlighted item into view
   useEffect(() => {
     if (!open || !listRef.current) return
     const item = listRef.current.children[highlighted]
@@ -60,10 +64,11 @@ function AutocompleteInput({ value, onChange, onEnter, suggestions = [], classNa
         onKeyDown={handleKeyDown}
         onBlur={e => { if (!listRef.current?.contains(e.relatedTarget)) setOpen(false) }}
       />
-      {open && filtered.length > 0 && (
+      {open && filtered.length > 0 && dropPos && (
         <div
           ref={listRef}
-          className="absolute z-50 left-0 top-full mt-0.5 bg-white border border-gray-200 rounded shadow-lg max-h-48 overflow-y-auto min-w-full"
+          style={{ position: 'fixed', top: dropPos.top, left: dropPos.left, minWidth: dropPos.minWidth, zIndex: 9999 }}
+          className="bg-white border border-gray-200 rounded shadow-lg max-h-48 overflow-y-auto"
         >
           {filtered.map((s, i) => (
             <div

ui/src/pages/Records.jsx

@@ -4,16 +4,26 @@ import { api } from '../api'
 function AutocompleteInput({ value, onChange, onEnter, onFocus, suggestions = [], className, placeholder }) {
   const [open, setOpen] = useState(false)
   const [highlighted, setHighlighted] = useState(0)
+  const [dropPos, setDropPos] = useState(null)
   const inputRef = useRef()
   const listRef = useRef()
   const filtered = value
     ? suggestions.filter(s => s.toLowerCase().includes(value.toLowerCase()))
     : suggestions
 
+  function openList() {
+    if (inputRef.current) {
+      const r = inputRef.current.getBoundingClientRect()
+      setDropPos({ top: r.bottom + 2, left: r.left, minWidth: r.width })
+    }
+    setOpen(true)
+    setHighlighted(0)
+  }
+
   function select(val) { onChange(val); setOpen(false); inputRef.current?.focus() }
 
   function handleKeyDown(e) {
-    if (e.altKey && e.key === 'ArrowDown') { e.preventDefault(); setOpen(true); setHighlighted(0); return }
+    if (e.altKey && e.key === 'ArrowDown') { e.preventDefault(); openList(); return }
     if (open && filtered.length > 0) {
       if (e.key === 'Tab')        { e.preventDefault(); setHighlighted(h => (h + 1) % filtered.length); return }
       if (e.key === 'ArrowDown')  { e.preventDefault(); setHighlighted(h => Math.min(h + 1, filtered.length - 1)); return }
@@ -32,13 +42,15 @@ function AutocompleteInput({ value, onChange, onEnter, onFocus, suggestions = []
   return (
     <div className="relative">
       <input ref={inputRef} className={className} value={value} placeholder={placeholder}
-        onChange={e => { onChange(e.target.value); if (e.target.value) setOpen(true) }}
+        onChange={e => { onChange(e.target.value); if (e.target.value) openList() }}
         onKeyDown={handleKeyDown}
         onFocus={onFocus}
         onBlur={e => { if (!listRef.current?.contains(e.relatedTarget)) setOpen(false) }}
       />
-      {open && filtered.length > 0 && (
+      {open && filtered.length > 0 && dropPos && (
-        <div ref={listRef} className="absolute z-50 left-0 top-full mt-0.5 bg-white border border-gray-200 rounded shadow-lg max-h-40 overflow-y-auto min-w-full">
+        <div ref={listRef}
+          style={{ position: 'fixed', top: dropPos.top, left: dropPos.left, minWidth: dropPos.minWidth, zIndex: 9999 }}
+          className="bg-white border border-gray-200 rounded shadow-lg max-h-40 overflow-y-auto">
           {filtered.map((s, i) => (
             <div key={s} className={`px-2 py-1 text-xs cursor-pointer whitespace-nowrap ${i === highlighted ? 'bg-blue-50 text-blue-700' : 'text-gray-700 hover:bg-gray-50'}`}
               onMouseDown={e => { e.preventDefault(); select(s) }}>{s}</div>