fix: input keyboard shortcuts (#676)

Fixes keyboard shortcuts:
- ctrl+a/e
- opt+arrow keys

codex-cli/src/components/chat/terminal-chat-input-thinking.tsx

@@ -106,11 +106,16 @@ export default function TerminalChatInputThinking({
 
   return (
     <Box flexDirection="column" gap={1}>
-      <Box gap={2}>
-        <Text>{frameWithSeconds}</Text>
+      <Box justifyContent="space-between">
+        <Box gap={2}>
+          <Text>{frameWithSeconds}</Text>
+          <Text>
+            Thinking
+            {dots}
+          </Text>
+        </Box>
         <Text>
-          Thinking
-          {dots}
+          Press <Text bold>Esc</Text> twice to interrupt
         </Text>
       </Box>
       {awaitingConfirm && (

codex-cli/src/components/chat/terminal-chat-input.tsx

@@ -412,7 +412,7 @@ export default function TerminalChatInput({
         setInput("");
         openApprovalOverlay();
         return;
-      } else if (inputValue === "exit") {
+      } else if (["exit", "q", ":q"].includes(inputValue)) {
         setInput("");
         setTimeout(() => {
           app.exit();
@@ -881,20 +881,30 @@ function TerminalChatInputThinking({
   );
 
   return (
-    <Box flexDirection="column" gap={1}>
-      <Box gap={2}>
-        <Text>{frameWithSeconds}</Text>
+    <Box width="100%" flexDirection="column" gap={1}>
+      <Box
+        flexDirection="row"
+        width="100%"
+        justifyContent="space-between"
+        paddingRight={1}
+      >
+        <Box gap={2}>
+          <Text>{frameWithSeconds}</Text>
+          <Text>
+            Thinking
+            {dots}
+          </Text>
+        </Box>
         <Text>
-          Thinking
-          {dots}
+          <Text dimColor>press</Text> <Text bold>Esc</Text>{" "}
+          {awaitingConfirm ? (
+            <Text bold>again</Text>
+          ) : (
+            <Text dimColor>twice</Text>
+          )}{" "}
+          <Text dimColor>to interrupt</Text>
         </Text>
       </Box>
-      {awaitingConfirm && (
-        <Text dimColor>
-          Press <Text bold>Esc</Text> again to interrupt and enter a new
-          instruction
-        </Text>
-      )}
     </Box>
   );
 }

codex-cli/src/components/chat/terminal-header.tsx

@@ -73,7 +73,7 @@ const TerminalHeader: React.FC<TerminalHeaderProps> = ({
             </Text>
             <Text dimColor>
               <Text color="blueBright">↳</Text> approval:{" "}
-              <Text bold color={colorsByPolicy[approvalPolicy]} dimColor>
+              <Text bold color={colorsByPolicy[approvalPolicy]}>
                 {approvalPolicy}
               </Text>
             </Text>

codex-cli/src/text-buffer.ts

@@ -610,6 +610,24 @@ export default class TextBuffer {
     }
   }
 
+  /* ------------------------------------------------------------------
+   *  Document-level navigation helpers
+   * ---------------------------------------------------------------- */
+
+  /** Move caret to *absolute* beginning of the buffer (row-0, col-0). */
+  private moveToStartOfDocument(): void {
+    this.preferredCol = null;
+    this.cursorRow = 0;
+    this.cursorCol = 0;
+  }
+
+  /** Move caret to *absolute* end of the buffer (last row, last column). */
+  private moveToEndOfDocument(): void {
+    this.preferredCol = null;
+    this.cursorRow = this.lines.length - 1;
+    this.cursorCol = this.lineLen(this.cursorRow);
+  }
+
   /* =====================================================================
    *  Higher‑level helpers
    * =================================================================== */
@@ -780,6 +798,18 @@ export default class TextBuffer {
       key["rightArrow"]
     ) {
       this.move("wordRight");
+    }
+    // Many terminal/OS combinations (e.g. macOS Terminal.app & iTerm2 with
+    // the default key-bindings) translate ⌥← / ⌥→ into the classic readline
+    // shortcuts ESC-b / ESC-f rather than an ANSI arrow sequence that Ink
+    // would tag with `leftArrow` / `rightArrow`.  Ink parses those 2-byte
+    // escape sequences into `input === "b"|"f"` with `key.meta === true`.
+    // Handle this variant explicitly so that Option+Arrow performs word
+    // navigation consistently across environments.
+    else if (key["meta"] && (input === "b" || input === "B")) {
+      this.move("wordLeft");
+    } else if (key["meta"] && (input === "f" || input === "F")) {
+      this.move("wordRight");
     } else if (key["home"]) {
       this.move("home");
     } else if (key["end"]) {
@@ -823,11 +853,11 @@ export default class TextBuffer {
 
     // Emacs/readline-style shortcuts
     else if (key["ctrl"] && (input === "a" || input === "\x01")) {
-      // Ctrl+A or ⌥← → start of line
-      this.move("home");
+      // Ctrl+A → start of input (first row, first column)
+      this.moveToStartOfDocument();
     } else if (key["ctrl"] && (input === "e" || input === "\x05")) {
-      // Ctrl+E or ⌥→ → end of line
-      this.move("end");
+      // Ctrl+E → end of input (last row, last column)
+      this.moveToEndOfDocument();
     } else if (key["ctrl"] && (input === "b" || input === "\x02")) {
       // Ctrl+B → char left
       this.move("left");