feat(debugger): completion in Evaluate, the Variables evaluate field and the Debug console (#1102)

While suspended, the debugger's expression fields complete from the debug adapter (DAP completions) in the selected frame: Evaluate, the Variables evaluate field and the Debug console share one hook. The list opens while typing an identifier or after '.', or on Ctrl+Space; Up/Down, Enter/Tab, Escape. The Evaluate dialog is resizable and its result tree grows with it. Backend: ide-dap completions (skipped without supportsCompletionsRequest), debug_completions on the host and the desktop app.

src-tauri/src/commands/debug.rs

@@ -72,6 +72,20 @@ pub async fn debug_evaluate(
     ide_host::ops::debug::debug_evaluate(&state.host, "", session, frame_id, expression).await
 }
 
+/// Completions for an expression typed in Evaluate (`line` / `column` 0-based, UTF-16).
+#[tauri::command]
+#[specta::specta]
+pub async fn debug_completions(
+    state: State<'_, AppState>,
+    session: DebugSessionId,
+    frame_id: Option<i64>,
+    text: String,
+    line: u32,
+    column: u32,
+) -> IdeResult<Vec<ide_dap::DebugCompletion>> {
+    ide_host::ops::debug::debug_completions(&state.host, "", session, frame_id, text, line, column).await
+}
+
 #[tauri::command]
 #[specta::specta]
 pub async fn debug_resume(state: State<'_, AppState>, session: DebugSessionId, thread_id: i64) -> IdeResult<()> {