refactor(chat): remove weekly limit flow

src/stores/chat/__tests__/chat-machine.helpers.test.ts

@@ -143,43 +143,6 @@ describe("sendResponseToUiMessage", () => {
 });
 
 describe("applyHttpSendOutput", () => {
-  it("removes the optimistic user message when the weekly limit is reached", () => {
-    const context = makeChatState({
-      messages: [
-        {
-          content: "hello",
-          isFromAI: false,
-          date: "2026-06-25",
-        },
-      ],
-    });
-
-    const nextState = applyHttpSendOutput(context, {
-      response: makeResponse({
-        reply: "",
-        messageId: "",
-        lockDetail: {
-          locked: true,
-          showContent: false,
-          showUpgrade: true,
-          reason: "weekly_limit",
-          hint: "Free message limit reached.",
-          detail: {
-            type: "weekly_msg_limit",
-            usedThisWeek: 3,
-            limit: 3,
-          },
-        },
-      }),
-      reply: null,
-    });
-
-    expect(nextState.messages).toEqual([]);
-    expect(nextState.isReplyingAI).toBe(false);
-    expect(nextState.upgradePromptVisible).toBe(true);
-    expect(nextState.upgradeReason).toBe("weekly_limit");
-  });
-
   it("stores insufficient credit state and removes failed optimistic messages", () => {
     const context = makeChatState({
       messages: [
@@ -363,7 +326,7 @@ describe("countLockedHistoryMessages", () => {
           isFromAI: true,
           date: "2026-06-29",
           locked: true,
-          lockReason: "weekly_limit",
+          lockReason: "insufficient_credits",
         },
         {
           content: "user text",

src/stores/chat/__tests__/chat-machine.transitions.test.ts

@@ -767,7 +767,7 @@ describe("chatMachine transitions", () => {
     actor.stop();
   });
 
-  it("clears the weekly limit prompt after payment succeeds", async () => {
+  it("clears the insufficient credits prompt after payment succeeds", async () => {
     const actor = createActor(createTestChatMachine()).start();
 
     actor.send({ type: "ChatUserLogin", token: "token" });
@@ -789,12 +789,12 @@ describe("chatMachine transitions", () => {
             locked: true,
             showContent: false,
             showUpgrade: true,
-            reason: "weekly_limit",
-            hint: "Free message limit reached.",
+            reason: "insufficient_credits",
+            hint: "Insufficient credits.",
             detail: {
-              type: "weekly_msg_limit",
-              usedThisWeek: 3,
-              limit: 3,
+              requiredCredits: 2,
+              currentCredits: 0,
+              shortfallCredits: 2,
             },
           },
           canSendMessage: false,
@@ -808,7 +808,9 @@ describe("chatMachine transitions", () => {
     });
 
     expect(actor.getSnapshot().context.upgradePromptVisible).toBe(true);
-    expect(actor.getSnapshot().context.upgradeReason).toBe("weekly_limit");
+    expect(actor.getSnapshot().context.upgradeReason).toBe(
+      "insufficient_credits",
+    );
     expect(actor.getSnapshot().context.canSendMessage).toBe(false);
 
     actor.send({ type: "ChatPaymentSucceeded" });