fix: keep only BYOK triangle highlighted in footer

Render the model bracket text and model name with normal dim styling and apply provider color only to the BYOK triangle indicator so footer emphasis matches prior behavior without changing footer layout stability.

👾 Generated with [Letta Code](https://letta.com)

Co-Authored-By: Letta <noreply@letta.com>

src/cli/components/InputRich.tsx

@@ -146,8 +146,8 @@ const InputFooter = memo(function InputFooter({
   );
   const maxAgentChars = Math.max(10, Math.floor(rightColumnWidth * 0.45));
   const displayAgentName = truncateEnd(agentName || "Unnamed", maxAgentChars);
-  const byokFlag = isByokProvider ? " ▲" : "";
-  const reservedChars = displayAgentName.length + byokFlag.length + 4;
+  const byokExtraChars = isByokProvider ? 2 : 0; // " ▲"
+  const reservedChars = displayAgentName.length + byokExtraChars + 4;
   const maxModelChars = Math.max(8, rightColumnWidth - reservedChars);
   const displayModel = truncateEnd(currentModel ?? "unknown", maxModelChars);
 
@@ -186,18 +186,17 @@ const InputFooter = memo(function InputFooter({
         ) : (
           <Text wrap="truncate-end">
             <Text color={colors.footer.agentName}>{displayAgentName}</Text>
-            <Text
-              dimColor={!isByokProvider}
-              color={
-                isByokProvider
-                  ? isOpenAICodexProvider
-                    ? "#74AA9C"
-                    : "yellow"
-                  : undefined
-              }
-            >
-              {` [${displayModel}${byokFlag}]`}
-            </Text>
+            <Text dimColor={!isByokProvider}>{" ["}</Text>
+            <Text dimColor={!isByokProvider}>{displayModel}</Text>
+            {isByokProvider ? (
+              <>
+                <Text> </Text>
+                <Text color={isOpenAICodexProvider ? "#74AA9C" : "yellow"}>
+                  ▲
+                </Text>
+              </>
+            ) : null}
+            <Text dimColor={!isByokProvider}>{"]"}</Text>
           </Text>
         )}
       </Box>