fix(editor): handle qualified tables in grid editing

[debba]

Summary

Fix grid editing and autocomplete for queries that qualify a table with the active schema or database, such as:

SELECT * FROM Ops.Addresses;

The table extractor previously treated Ops as the table name, so primary key lookup failed and the grid reported that Ops had no primary key.

The extractor now resolves Addresses when Ops matches the active database. A mismatched qualifier remains non-editable to prevent writes from targeting a table with the same name in the wrong database.

Autocomplete now keeps the database associated with each loaded table. Typing Ops. in a table position suggests tables from Ops, while Ops.Addresses. and table aliases continue to suggest columns.

Testing

• Added coverage for unquoted and quoted qualified identifiers
• Added coverage for missing and mismatched active schemas
• Added autocomplete coverage for full and partial database-qualified table names
• Added registration coverage for single and multi-database connections
• Ran the full test suite: 3,817 tests passed
• Ran TypeScript type checking and ESLint
• Verified an update against Ops.Addresses on MySQL 8.4

Closes #659

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (7 files)

• src/pages/Editor.tsx
• src/utils/sql.ts
• src/hooks/useSqlAutocompleteRegistration.ts
• src/utils/autocomplete.ts
• tests/hooks/useSqlAutocompleteRegistration.test.ts
• tests/utils/autocomplete.test.ts
• tests/utils/sql.test.ts

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_{Reviewed by glm-5.2 · Input: 40.1K · Output: 12.6K · Cached: 260.5K}