fix: handle missing functionResponse.id during SSE streams

[MrOrz]

Under some circumstances (such as when using ADK's AgentTool or SequentialAgent or when sending via a separate SSE request), the functionResponse.id field may be missing during real-time SSE streaming. This causes the applyEventToState logic in src/lib/chatCache.ts to drop the response because it tries to look up toolInvocations using the name as a fallback, which is undefined (since the original call was saved using its unique id).

As a result, the tool response does not render in the UI during streaming. However, upon a page refresh, the full session history is fetched, which correctly includes the id in the functionResponse, making it appear.

This PR fixes the issue by updating applyEventToState. If part.functionResponse.id is missing but part.functionResponse.name is present, it will iterate through toolInvocations to find the most recent matching tool call by its name that hasn't received a resp yet, and use that id as the key. This ensures the real-time SSE updates toolInvocations correctly and the UI drawer immediately shows the results.

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PR created automatically by Jules for task 7885769929636350666 started by @MrOrz

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[gemini-code-assist]

Code Review

This pull request primarily focuses on code formatting, import cleanups, and semicolon removals across various frontend and backend files. Additionally, it introduces a fallback mechanism in src/lib/chatCache.ts to resolve missing functionResponse.ids during SSE by matching the name of the last unanswered tool invocation. Feedback on this change suggests capturing part.functionResponse.name in a local constant to avoid using the non-null assertion operator !, which is safer and more idiomatic in TypeScript.

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[gemini-code-assist]

Instead of using the non-null assertion operator ! inside the .filter() callback, capture part.functionResponse.name in a local constant before the filter. This is safer and more idiomatic in TypeScript, as it avoids potential issues with lexical scope narrowing.

      if (!key && part.functionResponse.name) {
        const name = part.functionResponse.name
        const matchingIds = Object.keys(toolInvocations).filter(
          (id) =>
            toolInvocations[id].name === name &&
            !toolInvocations[id].resp,
        )
        if (matchingIds.length > 0) {
          // Pick the last one (most recent)
          key = matchingIds[matchingIds.length - 1]
        }
      }