fix(FN-1235): restore terminal text input interaction

- Remove the xterm pointer-events override from dashboard styles to allow terminal text input focus and typing
- Add a terminal input CSS contract test to guard against regressions in xterm helper element interactivity
- Add a patch changeset for @gsxdsm/fusion documenting the terminal text input fix

.changeset/fix-terminal-text-input.md

@@ -0,0 +1,5 @@
+---
+"@gsxdsm/fusion": patch
+---
+
+Fix terminal text input not working — remove pointer-events: none from xterm helper textarea CSS override.

packages/dashboard/app/__tests__/terminal-input.test.ts

@@ -0,0 +1,40 @@
+import { describe, it, expect } from "vitest";
+import { readFileSync } from "fs";
+import { resolve } from "path";
+
+const css = readFileSync(resolve(__dirname, "../styles.css"), "utf-8");
+
+function findHelperTextareaRule(): string {
+  const match = css.match(
+    /\.terminal-xterm\s+\.xterm\s+\.xterm-helper-textarea\s*\{([^}]*)\}/,
+  );
+  return match?.[1] ?? "";
+}
+
+describe("terminal helper textarea CSS contract", () => {
+  it("defines the xterm helper textarea rule", () => {
+    const ruleBody = findHelperTextareaRule();
+    expect(ruleBody).not.toBe("");
+  });
+
+  it("keeps mobile-friendly helper textarea dimensions", () => {
+    const ruleBody = findHelperTextareaRule();
+    expect(ruleBody).toMatch(/width:\s*1px\b/);
+    expect(ruleBody).toMatch(/height:\s*1px\b/);
+  });
+
+  it("does not disable pointer events on the helper textarea", () => {
+    const ruleBody = findHelperTextareaRule();
+    expect(ruleBody).not.toMatch(/pointer-events\s*:\s*none\b/);
+  });
+
+  it("positions the helper textarea off-screen", () => {
+    const ruleBody = findHelperTextareaRule();
+    expect(ruleBody).toMatch(/top:\s*-9999px\b/);
+  });
+
+  it("keeps the helper textarea invisible", () => {
+    const ruleBody = findHelperTextareaRule();
+    expect(ruleBody).toMatch(/opacity:\s*0\b/);
+  });
+});

packages/dashboard/app/styles.css

@@ -8413,7 +8413,6 @@ body {
   width: 1px !important;
   height: 1px !important;
   opacity: 0 !important;
-  pointer-events: none !important;
   z-index: -1 !important;
 }