feat: integrate custom features for smart context management

- Added a new integration script to manage custom features related to smart context.
- Implemented handlers for smart context operations (get, update, clear, stats) in ipc.
- Created a SmartContextStore class to manage context snippets and summaries.
- Developed hooks for React to interact with smart context (useSmartContext, useUpdateSmartContext, useClearSmartContext, useSmartContextStats).
- Included backup and restore functionality in the integration script.
- Validated integration by checking for custom modifications and file existence.

backups/backup-20251218-094212/src/__tests__/replacePromptReference.test.ts

@@ -0,0 +1,41 @@
+import { describe, expect, it } from "vitest";
+import { replacePromptReference } from "@/ipc/utils/replacePromptReference";
+
+describe("replacePromptReference", () => {
+  it("returns original when no references present", () => {
+    const input = "Hello world";
+    const output = replacePromptReference(input, {});
+    expect(output).toBe(input);
+  });
+
+  it("replaces a single @prompt:id with content", () => {
+    const input = "Use this: @prompt:42";
+    const prompts = { 42: "Meaning of life" };
+    const output = replacePromptReference(input, prompts);
+    expect(output).toBe("Use this: Meaning of life");
+  });
+
+  it("replaces multiple occurrences and keeps surrounding text", () => {
+    const input = "A @prompt:1 and B @prompt:2 end";
+    const prompts = { 1: "One", 2: "Two" };
+    const output = replacePromptReference(input, prompts);
+    expect(output).toBe("A One and B Two end");
+  });
+
+  it("leaves unknown references intact", () => {
+    const input = "Unknown @prompt:99 here";
+    const prompts = { 1: "One" };
+    const output = replacePromptReference(input, prompts);
+    expect(output).toBe("Unknown @prompt:99 here");
+  });
+
+  it("supports string keys in map as well as numeric", () => {
+    const input = "Mix @prompt:7 and @prompt:8";
+    const prompts = { "7": "Seven", 8: "Eight" } as Record<
+      string | number,
+      string
+    >;
+    const output = replacePromptReference(input, prompts);
+    expect(output).toBe("Mix Seven and Eight");
+  });
+});