fix(chat): scope keyboard avoidance to Facebook IAB

src/app/chat/hooks/__tests__/chat-keyboard-geometry.test.ts

@@ -38,7 +38,7 @@ describe("resolveChatKeyboardInset", () => {
     });
   });
 
-  it("uses the visual viewport occlusion without an extra gap", () => {
+  it("uses the visual viewport occlusion with the target gap", () => {
     expect(
       resolveChatKeyboardInset(
         baseline,
@@ -46,7 +46,7 @@ describe("resolveChatKeyboardInset", () => {
       ),
     ).toEqual({
       keyboardVisible: true,
-      bottomInset: 300,
+      bottomInset: 308,
       source: "visual-viewport",
     });
   });
@@ -62,7 +62,7 @@ describe("resolveChatKeyboardInset", () => {
       ),
     ).toEqual({
       keyboardVisible: true,
-      bottomInset: 320,
+      bottomInset: 328,
       source: "virtual-keyboard",
     });
   });
@@ -83,8 +83,8 @@ describe("resolveChatKeyboardInset", () => {
 
 describe("resolveChatKeyboardFallbackInset", () => {
   it("scales with viewport height and remains bounded", () => {
-    expect(resolveChatKeyboardFallbackInset(500)).toBe(260);
-    expect(resolveChatKeyboardFallbackInset(800)).toBe(336);
-    expect(resolveChatKeyboardFallbackInset(1_200)).toBe(380);
+    expect(resolveChatKeyboardFallbackInset(500)).toBe(268);
+    expect(resolveChatKeyboardFallbackInset(800)).toBe(344);
+    expect(resolveChatKeyboardFallbackInset(1_200)).toBe(388);
   });
 });