Fix linting errors in a number of core and tool files (partial)

- As part of this work I also started building out errors.ts which will be a cumulation of error helpers to better handle the challenging `catch (error: unknown)` requirement.
- More changes are to come, this is truly a partial change in order to not disrupt as many people as possible.

Part of https://b.corp.google.com/issues/411384603

1 files changed, 2 insertions, 2 deletions

diff --git a/packages/cli/src/core/gemini-stream.ts b/packages/cli/src/core/gemini-stream.ts
index 314a829d..70361f10 100644
--- a/packages/cli/src/core/gemini-stream.ts
+++ b/packages/cli/src/core/gemini-stream.ts
@@ -154,14 +154,14 @@ export const processGeminiStream = async ({
     if (signal.aborted) {
       throw new Error('Request cancelled by user');
     }
-  } catch (error: any) {
+  } catch (error: unknown) {
     if (renderTimeoutId) {
       // Ensure render loop stops on error
       clearTimeout(renderTimeoutId);
       renderTimeoutId = null;
     }
     // Delegate history update for error message
-    addErrorMessageToHistory(error, setHistory, getNextMessageId);
+    addErrorMessageToHistory(error as (Error | DOMException), setHistory, getNextMessageId);
   } finally {
     isStreamComplete = true; // Signal stream end for render loop completion
     if (renderTimeoutId) {