Saxon Fletcher e605178a63 feat(studio): render assistant log query results (#49293) ...

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## I have read the
[CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md)
file.

YES

## What kind of change does this PR introduce?

Feature and bug fix.

## What is the current behavior?

`query_logs` can return rows to the assistant, but the chat UI does not
hydrate those rows into the query result by default. The query only
becomes visible after clicking **Run query**, even though the same SQL
and time range work when rerun manually.

## What is the new behavior?

- Renders `query_logs` tool output through a dedicated logs message part
using the shared assistant query cell.
- Parses the exact MCP untrusted-data envelope into the initial query
result, without changing what the assistant model receives.
- Preserves the logs source and time range for manual reruns.
- Infers a useful table or chart presentation from the returned rows
while retaining explicit display settings.
- Adds focused tests for MCP result parsing, timestamps, errors, query
source handling, and visualization inference.

## How to test

1. Check out this PR and run Studio against a project that has recent
logs. Generate some project activity first, such as an API request, if
needed.
2. Open the AI Assistant and ask: `Show log counts by minute for the
last 15 minutes and summarize any spikes.`
3. Wait for `query_logs` to finish. Verify the query cell appears with
results already populated; do not click **Run query** first.
4. Verify the aggregate result opens as a chart, then switch to the
table view and confirm the underlying rows are present.
5. Click **Run query** and verify the query runs successfully again
using the same logs source and 15-minute time range.
6. Ask: `Show the 20 most recent log entries from the last 15 minutes.`
Verify this non-aggregate result opens as a table with rows already
populated.
7. Confirm the assistant's written summary agrees with the displayed
rows and does not report zero rows when results are visible.

## Additional context

This is the top PR in stack #49294 and depends on the back-end knowledge
change in #49292.

Verified with 59 focused tests across assistant context, Studio/MCP
tools, query display, and logs result parsing.


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
* Added AI Assistant support for querying and displaying application
logs.
* Added automatic visualization selection, including charts for
time-based and categorical data.
* Added source-aware query handling with dedicated titles, time ranges,
and result displays.
  * Added clearer loading, parsing, and error states for log queries.

* **Bug Fixes**
* Improved handling of streamed results, source changes, and query
display updates.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

2026-08-21 09:30:55 +10:00

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