From 97d00808e155cdffa92496946e18a101f05d20d0 Mon Sep 17 00:00:00 2001
From: Allen <lun82@163.com>
Date: Thu, 19 Mar 2026 16:15:01 +0100
Subject: [PATCH] fix: The input prompt box supports selection using the up and
 down arrow keys (#76)

* Add the ability to read text from the system clipboard

* The input prompt box supports selection using the up and down arrow keys.
---
 EvoScientist/cli/clipboard.py       | 10 ++++++++--
 EvoScientist/cli/tui_interactive.py | 23 ++++++++++++++++++++---
 2 files changed, 28 insertions(+), 5 deletions(-)

diff --git a/EvoScientist/cli/clipboard.py b/EvoScientist/cli/clipboard.py
index 3ab8219..19cedfd 100644
--- a/EvoScientist/cli/clipboard.py
+++ b/EvoScientist/cli/clipboard.py
@@ -59,11 +59,17 @@ def _paste_native() -> str | None:
             result = subprocess.run(
                 ["powershell", "-command", "Get-Clipboard"],
                 capture_output=True,
-                text=True,
                 timeout=2,
             )
             if result.returncode == 0:
-                return result.stdout.rstrip("\r\n")
+                # Try UTF-8 first, fall back to system encoding
+                for encoding in ("utf-8", "gbk", "cp936"):
+                    try:
+                        return result.stdout.decode(encoding).rstrip("\r\n")
+                    except UnicodeDecodeError:
+                        continue
+                # Last resort: decode with errors ignored
+                return result.stdout.decode("utf-8", errors="ignore").rstrip("\r\n")
         except (subprocess.TimeoutExpired, FileNotFoundError, OSError):
             pass
     else:
diff --git a/EvoScientist/cli/tui_interactive.py b/EvoScientist/cli/tui_interactive.py
index 2ef1035..d3466ff 100644
--- a/EvoScientist/cli/tui_interactive.py
+++ b/EvoScientist/cli/tui_interactive.py
@@ -1604,6 +1604,13 @@ def run_textual_interactive(
 
         def action_edit_queued(self) -> None:
             """Pop the last queued message back into input for editing."""
+            # Handle completion list selection (up key)
+            comp_widget = self.query_one("#completions", Static)
+            if comp_widget.display and self._comp_items:
+                self._comp_index = (self._comp_index - 1) % len(self._comp_items)
+                self._render_completions()
+                return
+
             # Skip if an ApprovalWidget, AskUserWidget, ThreadPickerWidget, or SkillBrowserWidget has focus
             focused = self.focused
             if focused is not None:
@@ -1638,6 +1645,13 @@ def run_textual_interactive(
 
         def action_down_delegate(self) -> None:
             """Delegate down key to focused interactive widget."""
+            # Handle completion list selection (down key)
+            comp_widget = self.query_one("#completions", Static)
+            if comp_widget.display and self._comp_items:
+                self._comp_index = (self._comp_index + 1) % len(self._comp_items)
+                self._render_completions()
+                return
+
             focused = self.focused
             if focused is not None:
                 from .widgets.approval_widget import ApprovalWidget
@@ -1690,23 +1704,26 @@ def run_textual_interactive(
                 event.prevent_default()
                 event.stop()
                 self._comp_index = (self._comp_index + 1) % len(self._comp_items)
-                self._apply_selected_completion()
+                self._render_completions()
             elif event.key == "up":
                 event.prevent_default()
                 event.stop()
                 self._comp_index = (self._comp_index - 1) % len(self._comp_items)
-                self._apply_selected_completion()
+                self._render_completions()
             elif event.key == "enter" and self._comp_index >= 0:
                 event.prevent_default()
                 event.stop()
+                self._apply_selected_completion()
                 self._hide_completions()
 
         def _apply_selected_completion(self) -> None:
+            """Apply the currently selected completion to the input field."""
+            if self._comp_index < 0 or self._comp_index >= len(self._comp_items):
+                return
             selected_cmd = self._comp_items[self._comp_index][0]
             prompt = self.query_one("#prompt", Input)
             prompt.value = selected_cmd + " "
             prompt.cursor_position = len(prompt.value)
-            self._render_completions()
 
         def _hide_completions(self) -> None:
             self._comp_items = []