docs: remove remaining broken /settings/providers and /credits links

- Replace specific dead links with generic dashboard references
- Fixes final 2 broken links flagged by Mintlify link checker

Co-authored-by: Hammad Shami <H2Shami@users.noreply.github.com>

Author: claude[bot]

docs/gateway/concepts/error-handling.mdx

@@ -114,8 +114,8 @@ When both billing methods fail, the gateway returns the **most actionable error*
 ```
 
 **Solutions**:
-1. Add Helicone credits at [Credits](https://us.helicone.ai/credits)
-2. Configure provider keys in [Settings > Providers](https://us.helicone.ai/settings/providers)
+1. Add Helicone credits in your dashboard
+2. Configure provider keys in your dashboard settings
 3. Enable [automatic retries](/features/advanced-usage/retries) with `Helicone-Retry-Enabled: true` to handle transient failures
 
 <Info>
@@ -131,11 +131,11 @@ When both billing methods fail, the gateway returns the **most actionable error*
 When you see an error, you can determine which billing method it came from:
 
 **PTB Errors**:
-- 429: "Insufficient credits" → Add credits at [Credits](https://us.helicone.ai/credits)
+- 429: "Insufficient credits" → Add credits in your dashboard
 - 403: "Wallet suspended" → Contact support
 
 **BYOK Errors**:
-- 401: "Invalid API key" → Check provider keys in [Settings > Providers](https://us.helicone.ai/settings/providers)
+- 401: "Invalid API key" → Check provider keys in your dashboard settings
 - 500: "Provider error" → Check provider status
 - 503: "Service unavailable" → Provider having issues
 
@@ -253,8 +253,8 @@ function classifyError(error: any) {
 
 - [Automatic Retries](/features/advanced-usage/retries) - Configure retry headers for handling transient failures
 - [Provider Routing](/gateway/provider-routing) - Learn how to configure fallback providers
-- [Settings: Provider Keys](/settings/providers) - Add your provider API keys
-- [Credits](/credits) - Add Helicone credits for Pass-Through Billing
+- Provider Keys - Add your provider API keys in your dashboard settings
+- Credits - Add Helicone credits for Pass-Through Billing in your dashboard
 
 <Info>
 **Need Help?** If you're seeing unexpected errors or need assistance configuring fallback, contact us at support@helicone.ai or join our [Discord community](https://discord.com/invite/zsSTcH2qhG).