feat(panel): editor keeps the values when the sim changes; one-tap RESET back to the look

src/components/AdjustmentPanel.tsx

@@ -36,6 +36,9 @@ interface AdjustmentPanelProps {
   recipes: Recipe[];
   currentRecipeId: string;
   adjustments: ColorAdjustments;
+  // The values the active look ships with — a saved recipe's own set, a film
+  // sim's canonical set, or the neutral defaults. RESET puts them back.
+  lookDefaults: ColorAdjustments;
   selectedFrame: FrameId;
   // FRAME tab CROP. Only meaningful on the library's plain frames (the camera
   // composes through its ratio band, polaroid/wall through their own window),
@@ -163,6 +166,7 @@ export default function AdjustmentPanel({
   recipes,
   currentRecipeId,
   adjustments,
+  lookDefaults,
   selectedFrame,
   cropRatio,
   onUpdateCropRatio,
@@ -246,6 +250,17 @@ export default function AdjustmentPanel({
 
   const a = adjustments;
 
+  // RESET (parameter tabs): every number of the active look back on the value
+  // it ships with. Only the parameters count as "changed" — the groups below
+  // are part of the same look, so they light it too.
+  const lookDirty =
+    [...PARAM_DEFS.iq, ...PARAM_DEFS.wb, ...PARAM_DEFS.filters].some(
+      (d) => d.get(a) !== d.get(lookDefaults)
+    ) ||
+    (a.colorChrome || 'none') !== (lookDefaults.colorChrome || 'none') ||
+    (a.colorChromeBlue || 'none') !== (lookDefaults.colorChromeBlue || 'none') ||
+    String(a.dynamicRange ?? 'auto') !== String(lookDefaults.dynamicRange ?? 'auto');
+
   const renderChip = (c: ChipDef) => {
     const tone = c.active
       ? 'border-amber-500/70 bg-amber-500/15'
@@ -302,6 +317,19 @@ export default function AdjustmentPanel({
       })
     );
 
+  const resetChip = (): ChipDef => ({
+    key: 'reset-params',
+    label: 'RESET',
+    active: false,
+    onPress: () => onUpdateAdjustments({ ...lookDefaults }),
+  });
+
+  // Pinned OUTSIDE the scroll row: the rows keep their scroll offset across
+  // tabs, so a RESET sitting inside one can be scrolled off just when it is
+  // wanted — after a tweak halfway along the strip.
+  const resetChipFixed = () =>
+    lookDirty ? <View className="pl-2">{renderChip(resetChip())}</View> : null;
+
   const choiceChips = (
     keyPrefix: string,
     options: { v: string; d: string }[],
@@ -521,22 +549,28 @@ export default function AdjustmentPanel({
         // opens its AUTO/DR100/DR200/DR400 strip above (same as the chrome
         // groups on WB).
         return (
-          <ScrollView
-            horizontal
-            showsHorizontalScrollIndicator={false}
-            contentContainerStyle={{ alignItems: 'center', paddingHorizontal: 8, paddingVertical: 6 }}
-          >
-            {paramChips(paramDefs.iq)}
-            {renderChip(groupChip('dr'))}
-          </ScrollView>
+          <View className="flex-row items-center">
+            {resetChipFixed()}
+            <ScrollView
+              horizontal
+              showsHorizontalScrollIndicator={false}
+              style={{ flex: 1 }}
+              contentContainerStyle={{ alignItems: 'center', paddingHorizontal: 8, paddingVertical: 6 }}
+            >
+              {paramChips(paramDefs.iq)}
+              {renderChip(groupChip('dr'))}
+            </ScrollView>
+          </View>
         );
 
       case 'wb':
         return (
-          <View>
+          <View className="flex-row items-center">
+            {resetChipFixed()}
             <ScrollView
               horizontal
               showsHorizontalScrollIndicator={false}
+              style={{ flex: 1 }}
               contentContainerStyle={{ alignItems: 'center', paddingHorizontal: 8, paddingVertical: 6 }}
             >
               {choiceChips(
@@ -561,13 +595,17 @@ export default function AdjustmentPanel({
 
       case 'filters':
         return (
-          <ScrollView
-            horizontal
-            showsHorizontalScrollIndicator={false}
-            contentContainerStyle={{ alignItems: 'center', paddingHorizontal: 8, paddingVertical: 8 }}
-          >
-            {paramChips(paramDefs.filters)}
-          </ScrollView>
+          <View className="flex-row items-center">
+            {resetChipFixed()}
+            <ScrollView
+              horizontal
+              showsHorizontalScrollIndicator={false}
+              style={{ flex: 1 }}
+              contentContainerStyle={{ alignItems: 'center', paddingHorizontal: 8, paddingVertical: 8 }}
+            >
+              {paramChips(paramDefs.filters)}
+            </ScrollView>
+          </View>
         );
 
       case 'frame':

src/components/RecipeCreateModal.tsx

@@ -228,9 +228,12 @@ export default function RecipeCreateModal({
     setIso(null);
   }, [visible, currentBase, initial]);
 
-  // Switching the simulation reloads its standard values into the form.
+  // Switching the simulation reloads its standard values into the form — not
+  // in the editor though: there the numbers on screen are the user's own, and
+  // swapping the base look under them must not throw them away.
   const selectSim = (b: BaseFilter) => {
     setSim(b);
+    if (initial) return;
     const v = valuesOf(b);
     setDr(v.dr);
     setGrain(v.grain);