Copy Korean terminal text without extra spaces (#7254)

* fix(terminal): preserve Korean text when copying native terminal cells

* fix(terminal): omit continuation cells from copied text

Native terminal buffers already retain authoritative cell widths. Skip zero-width continuation cells when serializing a selection so Korean text copies with only its real spaces, while preserving the buffer representation.

Co-authored-by: helloimdevman <333048235+helloimdevman@users.noreply.github.com>

---------

Co-authored-by: helloimdevman <333048235+helloimdevman@users.noreply.github.com>
Co-authored-by: paseo-bot[bot] <266920839+paseo-bot[bot]@users.noreply.github.com>

packages/app/src/terminal/native-renderer/terminal-selection.test.ts

@@ -41,6 +41,51 @@ function rowWithText(
 }
 
 describe("native terminal selection", () => {
+  it("copies Korean output without adding spaces for continuation cells", async () => {
+    const terminal = createNativeHeadlessTerminal({ rows: 3, cols: 30 });
+    const copied: string[] = [];
+    try {
+      await terminal.write("한글 문장");
+      const bounds = terminal.getBufferBounds();
+      await copyTerminalSelection({
+        terminal,
+        selection: {
+          start: { row: bounds.cursorRow, col: 0 },
+          end: { row: bounds.cursorRow, col: bounds.cursorCol - 1 },
+          coordinateEpoch: bounds.coordinateEpoch,
+        },
+        clipboard: {
+          writeText: async (text) => {
+            copied.push(text);
+          },
+        },
+      });
+      expect(copied).toEqual(["한글 문장"]);
+    } finally {
+      terminal.dispose();
+    }
+  });
+
+  it("copies Korean text and real spaces without wide-character continuation spaces", async () => {
+    const terminal = createNativeHeadlessTerminal({ rows: 3, cols: 30 });
+    try {
+      await terminal.write("한글 문장 | 성공");
+      const bounds = terminal.getBufferBounds();
+      expect(
+        extractTerminalSelectedText({
+          terminal,
+          selection: {
+            start: { row: bounds.cursorRow, col: 0 },
+            end: { row: bounds.cursorRow, col: bounds.cursorCol - 1 },
+            coordinateEpoch: bounds.coordinateEpoch,
+          },
+        }),
+      ).toBe("한글 문장 | 성공");
+    } finally {
+      terminal.dispose();
+    }
+  });
+
   it("expands a long-press coordinate to the whole terminal word", async () => {
     const terminal = createNativeHeadlessTerminal({ rows: 4, cols: 32, scrollbackLines: 20 });
     await terminal.write("before PASEO_TARGET after\r\n");

packages/app/src/terminal/native-renderer/terminal-selection.ts

@@ -327,7 +327,10 @@ export function extractTerminalSelectedText(input: TerminalSelectedTextInput): s
     const startCol = startsOnThisRow ? selection.start.col : 0;
     const endCol = endsOnThisRow ? selection.end.col : cells.length - 1;
     const selectedCells = cells.slice(Math.max(0, startCol), Math.max(0, endCol) + 1);
-    const line = selectedCells.map((cell) => cell.char || " ").join("");
+    const line = selectedCells
+      .filter((cell) => cell.width !== 0)
+      .map((cell) => cell.char)
+      .join("");
     if (offset > 0 && window.wrappedRows[offset] !== true) {
       text += "\n";
     }