fix(ci/toolchain): enforce rust 1.90 in preview workflow

.github/workflows/issue-code.yml

@@ -148,10 +148,10 @@ jobs:
           install -m 0755 "$HOME/.local/tools/jq-1.7.1/jq" "$HOME/.local/bin/jq"
           jq --version
 
-      - name: Setup Rust toolchain (1.89)
+      - name: Setup Rust toolchain (1.90)
         uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: 1.89.0
+          toolchain: 1.90.0
 
       - name: Cache Rust build (cargo + target)
         uses: Swatinem/rust-cache@v2

.github/workflows/preview-build.yml

@@ -64,14 +64,15 @@ jobs:
         shell: bash
         run: |
           rustup set profile minimal
-          rustup toolchain install 1.89.0 --profile minimal --target ${{ matrix.target }}
-          rustup default 1.89.0
+          rustup toolchain install 1.90.0 --profile minimal
+          rustup default 1.90.0
+          rustup target add ${{ matrix.target }}
 
       - name: Rust cache (target + registries)
         uses: Swatinem/rust-cache@v2
         with:
           prefix-key: v1-preview
-          shared-key: preview-${{ matrix.target }}-rust-1.89
+          shared-key: preview-${{ matrix.target }}-rust-1.90
           workspaces: |
             code-rs -> target
             codex-rs -> target

.github/workflows/upstream-merge.yml

@@ -254,7 +254,7 @@ jobs:
         if: steps.check_upstream.outputs.skip != 'true'
         uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: 1.89.0
+          toolchain: 1.90.0
 
       - name: Add local bin to PATH
         if: steps.check_upstream.outputs.skip != 'true'

code-rs/cloud-tasks/Cargo.toml

@@ -30,6 +30,7 @@ serde_json = "1"
 reqwest = { version = "0.12", features = ["json"] }
 serde = { version = "1", features = ["derive"] }
 unicode-width = "0.1"
+unicode-segmentation = "1.12"
 code-tui = { path = "../tui" }
 
 [dev-dependencies]

code-rs/cloud-tasks/src/lib.rs

@@ -12,6 +12,7 @@ use std::path::PathBuf;
 use std::sync::Arc;
 use std::time::Duration;
 use std::time::Instant;
+use unicode_segmentation::UnicodeSegmentation;
 use tokio::sync::mpsc::UnboundedSender;
 use tracing::info;
 use tracing_subscriber::EnvFilter;
@@ -1202,7 +1203,16 @@ pub async fn run_main(cli: Cli, _code_linux_sandbox_exe: Option<PathBuf>) -> any
                                     if let Some(m) = app.env_modal.as_mut() { m.query.push(ch); }
                                     needs_redraw = true;
                                 }
-                                KeyCode::Backspace => { if let Some(m) = app.env_modal.as_mut() { m.query.pop(); } needs_redraw = true; }
+                                KeyCode::Backspace => {
+                                    if let Some(m) = app.env_modal.as_mut() {
+                                        if let Some((idx, _)) = m.query.grapheme_indices(true).last() {
+                                            m.query.truncate(idx);
+                                        } else {
+                                            m.query.clear();
+                                        }
+                                    }
+                                    needs_redraw = true;
+                                }
                                 KeyCode::Down | KeyCode::Char('j') => { if let Some(m) = app.env_modal.as_mut() { m.selected = m.selected.saturating_add(1); } needs_redraw = true; }
                                 KeyCode::Up | KeyCode::Char('k') => { if let Some(m) = app.env_modal.as_mut() { m.selected = m.selected.saturating_sub(1); } needs_redraw = true; }
                                 KeyCode::Home => { if let Some(m) = app.env_modal.as_mut() { m.selected = 0; } needs_redraw = true; }

code-rs/tui/src/app.rs

@@ -1222,6 +1222,24 @@ impl App<'_> {
                 }
                 AppEvent::KeyEvent(mut key_event) => {
                     if self.timing_enabled { self.timing.on_key(); }
+                    #[cfg(windows)]
+                    {
+                        use crossterm::event::KeyCode;
+                        use crossterm::event::KeyEventKind;
+                        if matches!(key_event.kind, KeyEventKind::Repeat) {
+                            match key_event.code {
+                                KeyCode::Left
+                                | KeyCode::Right
+                                | KeyCode::Up
+                                | KeyCode::Down
+                                | KeyCode::Home
+                                | KeyCode::End
+                                | KeyCode::Backspace
+                                | KeyCode::Delete => {}
+                                _ => continue,
+                            }
+                        }
+                    }
                     // On terminals without keyboard enhancement flags (notably some Windows
                     // Git Bash/mintty setups), crossterm may emit duplicate key-up events or
                     // only report releases. Track which keys were seen as pressed so matching

code-rs/tui/src/bottom_pane/theme_selection_view.rs

@@ -4,6 +4,7 @@ use code_core::config_types::ThemeName;
 use crossterm::event::KeyCode;
 use crossterm::event::KeyEvent;
 use crossterm::event::KeyModifiers;
+use unicode_segmentation::UnicodeSegmentation;
 use ratatui::buffer::Buffer;
 use ratatui::layout::Alignment;
 use ratatui::layout::Rect;
@@ -1484,7 +1485,11 @@ impl ThemeSelectionView {
                     }
                     match s.step.get() {
                         CreateStep::Prompt => {
-                            s.prompt.pop();
+                            if let Some((idx, _)) = s.prompt.grapheme_indices(true).last() {
+                                s.prompt.truncate(idx);
+                            } else {
+                                s.prompt.clear();
+                            }
                         }
                         CreateStep::Action | CreateStep::Review => {
                             return;
@@ -1496,7 +1501,11 @@ impl ThemeSelectionView {
                     }
                     match s.step.get() {
                         CreateStep::Prompt => {
-                            s.prompt.pop();
+                            if let Some((idx, _)) = s.prompt.grapheme_indices(true).last() {
+                                s.prompt.truncate(idx);
+                            } else {
+                                s.prompt.clear();
+                            }
                         }
                         CreateStep::Action | CreateStep::Review => {
                             return;