fix(filters): group mode reads AND/OR, connective labels toggle it (user report)

The ALL/ANY pills required mapping ALL→AND, ANY→OR that nobody should
have to learn. The pills now say AND / OR directly (wire values stay
all|any — server contract untouched), and the AND/OR text between
sibling rules became a clickable toggle for its parent group, so the
switch lives exactly where you're looking.

web/src/filter_builder.ts

@@ -492,6 +492,15 @@ export function filterBuilderData() {
       (node as FilterGroupState).mode = mode;
       this._touch();
     },
+    // toggleGroupMode flips a group between AND and OR (the clickable
+    // connective between rules targets its parent group).
+    toggleGroupMode(parentPath: number[]): void {
+      const node = this.nodeAt(parentPath);
+      if (!node || !("children" in node)) return;
+      const group = node as FilterGroupState;
+      group.mode = group.mode === "all" ? "any" : "all";
+      this._touch();
+    },
     setRuleField(path: number[], key: string): void {
       const node = this.nodeAt(path);
       if (!node || !isRule(node)) return;