tui: keep trimming for normal submits; only raw ! triggers bash

src/tui/tui-input-history.test.ts

@@ -22,7 +22,7 @@ describe("createEditorSubmitHandler", () => {
     expect(editor.addToHistory).toHaveBeenCalledWith("hello world");
   });
 
-  it("does not trim input before adding to history", () => {
+  it("trims input before adding to history", () => {
     const editor = {
       setText: vi.fn(),
       addToHistory: vi.fn(),
@@ -37,7 +37,7 @@ describe("createEditorSubmitHandler", () => {
 
     handler("   hi   ");
 
-    expect(editor.addToHistory).toHaveBeenCalledWith("   hi   ");
+    expect(editor.addToHistory).toHaveBeenCalledWith("hi");
   });
 
   it("does not add empty-string submissions to history", () => {

src/tui/tui.submit-handler.test.ts

@@ -50,7 +50,7 @@ describe("createEditorSubmitHandler", () => {
     expect(sendMessage).toHaveBeenCalledWith("!");
   });
 
-  it("does not trim input", () => {
+  it("trims normal messages before sending and adding to history", () => {
     const editor = {
       setText: vi.fn(),
       addToHistory: vi.fn(),
@@ -68,7 +68,7 @@ describe("createEditorSubmitHandler", () => {
 
     onSubmit("  hello  ");
 
-    expect(sendMessage).toHaveBeenCalledWith("  hello  ");
-    expect(editor.addToHistory).toHaveBeenCalledWith("  hello  ");
+    expect(sendMessage).toHaveBeenCalledWith("hello");
+    expect(editor.addToHistory).toHaveBeenCalledWith("hello");
   });
 });

src/tui/tui.ts

@@ -48,22 +48,25 @@ export function createEditorSubmitHandler(params: {
   handleBangLine: (value: string) => Promise<void> | void;
 }) {
   return (text: string) => {
-    // NOTE: We intentionally do not trim here.
-    // The caller decides how to interpret whitespace.
-    const value = text;
+    const raw = text;
+    const value = raw.trim();
     params.editor.setText("");
+
+    // Keep previous behavior: ignore empty/whitespace-only submissions.
     if (!value) return;
 
+    // Bash mode: only if the very first character is '!' and it's not just '!'.
+    // IMPORTANT: use the raw (untrimmed) text so leading spaces do NOT trigger.
+    // Per requirement: a lone '!' should be treated as a normal message.
+    if (raw.startsWith("!") && raw !== "!") {
+      params.editor.addToHistory(raw);
+      void params.handleBangLine(raw);
+      return;
+    }
+
     // Enable built-in editor prompt history navigation (up/down).
     params.editor.addToHistory(value);
 
-    // Bash mode: only if the very first character is '!' and it's not just '!'.
-    // Per requirement: a lone '!' should be treated as a normal message.
-    if (value.startsWith("!") && value !== "!") {
-      void params.handleBangLine(value);
-      return;
-    }
-
     if (value.startsWith("/")) {
       void params.handleCommand(value);
       return;