anomalyco_opencode/patches/@tanstack%2Fvirtual-core@3.17.8.patch

diff --git a/dist/cjs/index.cjs b/dist/cjs/index.cjs
index e470032a9572b3ced764ca02238a8c6be435a9d4..65cd7ba4159d47d4c0cfb1adea69281ee30ba28a 100644
--- a/dist/cjs/index.cjs
+++ b/dist/cjs/index.cjs
@@ -289,7 +289,7 @@ class Virtualizer {
       let anchor = null;
       let followOnAppend = null;
       let edgeKeysChanged = false;
-      if (prevOptions !== void 0 && prevOptions.enabled && merged.enabled && merged.anchorTo === "end" && this.scrollElement !== null) {
+      if (prevOptions !== void 0 && prevOptions.enabled && merged.enabled && this.scrollElement !== null) {
         const prevCount = prevOptions.count;
         const nextCount = merged.count;
         const measurements = this.getMeasurements();
@@ -303,7 +303,7 @@ class Virtualizer {
           if (item) {
             anchor = [item.key, this.getScrollOffset() - item.start];
           }
-          const behavior = merged.followOnAppend === true ? "auto" : merged.followOnAppend || null;
+          const behavior = merged.anchorTo === "end" ? merged.followOnAppend === true ? "auto" : merged.followOnAppend || null : null;
           if (behavior && nextCount > prevCount && this.isAtEnd(prevOptions.scrollEndThreshold) && (prevCount === 0 || merged.getItemKey(nextCount - 1) !== prevLastKey)) {
             followOnAppend = behavior;
           }
@@ -725,17 +725,20 @@ class Virtualizer {
         this.getMeasurements(),
         this.getSize(),
         this.getScrollOffset(),
-        this.options.lanes
+        this.options.lanes,
+        this.options.paddingEnd
       ],
-      (measurements, outerSize, scrollOffset, lanes) => {
+      (measurements, outerSize, scrollOffset, lanes, _paddingEnd) => {
         if (measurements.length === 0 || outerSize === 0) {
           this.range = null;
           return null;
         }
+        const maxScrollOffset = Math.max(this.options.scrollMargin + this.getTotalSize() - outerSize, 0);
+        const effectiveScrollOffset = Math.min(Math.max(scrollOffset, 0), maxScrollOffset);
         this.range = calculateRangeImpl(
           measurements,
           outerSize,
-          scrollOffset,
+          effectiveScrollOffset,
           lanes,
           // Pass the typed array so binary search + forward-walk can read
           // start/end directly from Float64Array, skipping the Proxy traps.
diff --git a/dist/cjs/index.d.cts b/dist/cjs/index.d.cts
index cc1001b8a14d06aa73a3a9e8f59870557ee9e7d6..70b202ed436ce1f3283a8465a81faf2e6e2e7983 100644
--- a/dist/cjs/index.d.cts
+++ b/dist/cjs/index.d.cts
@@ -144,7 +144,7 @@ export declare class Virtualizer<TScrollElement extends Element | Window, TItemE
             startIndex: number;
             endIndex: number;
         } | null;
-        updateDeps(newDeps: [VirtualItem[], number, number, number]): void;
+        updateDeps(newDeps: [VirtualItem[], number, number, number, number]): void;
     };
     getVirtualIndexes: {
         (): number[];
diff --git a/dist/esm/index.d.ts b/dist/esm/index.d.ts
index 6b43c0aea7ed9eeef75cbfb1351fcbd243913bdd..7be2680967934ddfbc4583a210a3d11ee2cddc94 100644
--- a/dist/esm/index.d.ts
+++ b/dist/esm/index.d.ts
@@ -144,7 +144,7 @@ export declare class Virtualizer<TScrollElement extends Element | Window, TItemE
             startIndex: number;
             endIndex: number;
         } | null;
-        updateDeps(newDeps: [VirtualItem[], number, number, number]): void;
+        updateDeps(newDeps: [VirtualItem[], number, number, number, number]): void;
     };
     getVirtualIndexes: {
         (): number[];
diff --git a/dist/esm/index.js b/dist/esm/index.js
index 2495b26cf2c3589213546b3958eaadf2eb6b751d..01373d68c540e022bd7be59d307a3e39a5b0b899 100644
--- a/dist/esm/index.js
+++ b/dist/esm/index.js
@@ -287,7 +287,7 @@ class Virtualizer {
       let anchor = null;
       let followOnAppend = null;
       let edgeKeysChanged = false;
-      if (prevOptions !== void 0 && prevOptions.enabled && merged.enabled && merged.anchorTo === "end" && this.scrollElement !== null) {
+      if (prevOptions !== void 0 && prevOptions.enabled && merged.enabled && this.scrollElement !== null) {
         const prevCount = prevOptions.count;
         const nextCount = merged.count;
         const measurements = this.getMeasurements();
@@ -301,7 +301,7 @@ class Virtualizer {
           if (item) {
             anchor = [item.key, this.getScrollOffset() - item.start];
           }
-          const behavior = merged.followOnAppend === true ? "auto" : merged.followOnAppend || null;
+          const behavior = merged.anchorTo === "end" ? merged.followOnAppend === true ? "auto" : merged.followOnAppend || null : null;
           if (behavior && nextCount > prevCount && this.isAtEnd(prevOptions.scrollEndThreshold) && (prevCount === 0 || merged.getItemKey(nextCount - 1) !== prevLastKey)) {
             followOnAppend = behavior;
           }
@@ -723,17 +723,20 @@ class Virtualizer {
         this.getMeasurements(),
         this.getSize(),
         this.getScrollOffset(),
-        this.options.lanes
+        this.options.lanes,
+        this.options.paddingEnd
       ],
-      (measurements, outerSize, scrollOffset, lanes) => {
+      (measurements, outerSize, scrollOffset, lanes, _paddingEnd) => {
         if (measurements.length === 0 || outerSize === 0) {
           this.range = null;
           return null;
         }
+        const maxScrollOffset = Math.max(this.options.scrollMargin + this.getTotalSize() - outerSize, 0);
+        const effectiveScrollOffset = Math.min(Math.max(scrollOffset, 0), maxScrollOffset);
         this.range = calculateRangeImpl(
           measurements,
           outerSize,
-          scrollOffset,
+          effectiveScrollOffset,
           lanes,
           // Pass the typed array so binary search + forward-walk can read
           // start/end directly from Float64Array, skipping the Proxy traps.
diff --git a/src/index.ts b/src/index.ts
index dc6f1010c4d4758de9c46fb8d69209e582e47171..6988f58f7406ee64789ad9ad44f519ed4cf9a00f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -575,7 +575,6 @@ export class Virtualizer<
       prevOptions !== undefined &&
       prevOptions.enabled &&
       merged.enabled &&
-      merged.anchorTo === 'end' &&
       this.scrollElement !== null
     ) {
       const prevCount = prevOptions.count
@@ -611,9 +610,11 @@ export class Virtualizer<
         }

         const behavior =
-          merged.followOnAppend === true
-            ? 'auto'
-            : merged.followOnAppend || null
+          merged.anchorTo === 'end'
+            ? merged.followOnAppend === true
+              ? 'auto'
+              : merged.followOnAppend || null
+            : null

         if (
           behavior &&
@@ -1410,16 +1411,25 @@ export class Virtualizer<
       this.getSize(),
       this.getScrollOffset(),
       this.options.lanes,
+      this.options.paddingEnd,
     ],
-    (measurements, outerSize, scrollOffset, lanes) => {
+    (measurements, outerSize, scrollOffset, lanes, _paddingEnd) => {
       if (measurements.length === 0 || outerSize === 0) {
         this.range = null
         return null
       }
+      const maxScrollOffset = Math.max(
+        this.options.scrollMargin + this.getTotalSize() - outerSize,
+        0,
+      )
+      const effectiveScrollOffset = Math.min(
+        Math.max(scrollOffset, 0),
+        maxScrollOffset,
+      )
       this.range = calculateRangeImpl(
         measurements,
         outerSize,
-        scrollOffset,
+        effectiveScrollOffset,
         lanes,
         // Pass the typed array so binary search + forward-walk can read
         // start/end directly from Float64Array, skipping the Proxy traps.