improved (full color) sandbox, mount /tmp to display build warnings, display sandbox name in footer (#96)

packages/cli/src/ui/components/Footer.tsx

@@ -19,8 +19,14 @@ export const Footer: React.FC<FooterProps> = ({
   debugMode,
   debugMessage,
 }) => (
-  <Box marginTop={1} justifyContent="space-between">
-    <Box minWidth={15}>
+  <Box
+    marginTop={1}
+    display="flex"
+    justifyContent="space-between"
+    width="100%"
+  >
+    {/* Left Section: Help/DebugMode */}
+    <Box>
       <Text color={Colors.SubtleComment}>
         {queryLength === 0 ? '? for shortcuts' : ''}
         {debugMode && (
@@ -28,6 +34,24 @@ export const Footer: React.FC<FooterProps> = ({
         )}
       </Text>
     </Box>
-    <Text color={Colors.AccentBlue}>Gemini</Text>
+
+    {/* Middle Section: Centered Sandbox Info */}
+    <Box
+      flexGrow={1}
+      alignItems="center"
+      justifyContent="center"
+      display="flex"
+    >
+      {process.env.SANDBOX ? (
+        <Text color="green"> {process.env.SANDBOX} </Text>
+      ) : (
+        <Text color="red"> WARNING: OUTSIDE SANDBOX </Text>
+      )}
+    </Box>
+
+    {/* Right Section: Gemini Label */}
+    <Box>
+      <Text color={Colors.AccentBlue}>Gemini</Text>
+    </Box>
   </Box>
 );

scripts/start_sandbox.sh

@@ -36,6 +36,9 @@ run_args=(-it --rm)
 # mount current directory as $WORKDIR inside container
 run_args+=(-v "$PWD:$WORKDIR")
 
+# mount $TMPDIR as /tmp inside container
+run_args+=(-v "$TMPDIR:/tmp")
+
 # name container after image, plus numeric suffix to avoid conflicts
 INDEX=0
 while $CMD ps -a --format "{{.Names}}" | grep -q "$IMAGE-$INDEX"; do
@@ -46,6 +49,9 @@ run_args+=(--name "$IMAGE-$INDEX" --hostname "$IMAGE-$INDEX")
 # also set SANDBOX environment variable as container name
 run_args+=(--env "SANDBOX=$IMAGE-$INDEX")
 
+# pass TERM and COLORTERM to container to maintain terminal colors
+run_args+=(--env "TERM=$TERM" --env "COLORTERM=$COLORTERM")
+
 # enable debugging via node --inspect-brk (and $DEBUG_PORT) if DEBUG is set
 node_args=()
 if [ -n "${DEBUG:-}" ]; then