exec-sql: query names, types, edit-sql, SheetsSheet query column

[saulbert]

Summary

• exec-sql now names sheets by the SQL query text instead of static "query"
• New edit-sql command: edit the current sheet's query in place and reload
• Query column added to SheetsSheet: view and edit queries, auto-reloads on edit
• Column types (int/float) auto-detected from first result row in query sheets

Addresses all items from #2136.

@frosencrantz — would you mind trying this out and letting us know if it covers your workflow?

Test plan

• Open a SQLite file, run exec-sql with different queries — each sheet gets a unique name
• On a query sheet, run edit-sql — input pre-fills with current query, edits in place and reloads
• Open SheetsSheet (S) — query column shows the SQL for query sheets
• Edit the query column in SheetsSheet — sheet reloads with the new query
• Run a query returning integers/floats — verify columns get typed (right-aligned)

🤖 Generated with Claude Code

[frosencrantz]

I tried the suggested tests. One issue encountered:

I tried running edit-sql on a SqliteSheet for a table, like found via the SqliteIndexSheet and it allowed me to do that, and it renamed the sheet to the query. I don't think it should allow users to edit a SqliteSheet that represents a table. In this case the default query was already empty. Maybe the behavior should be to be fail or to call exec-sql and create a new sheet or tell user to run exec-sql

I guess if the sheet was a view it might be useful to allow me to edit the view query, and update the database, but I think that might be for another feature request.