[datlechin]

Summary

• Foreign key preview: Open Table in the bottom bar opens the referenced table filtered to the key, with the matching row on the row screen under the connection's Safe Mode. Back returns to the filtered list, then to the source row.
• A preview value that is part of one of that table's foreign keys is a link. It pushes the next row inside the sheet; Back returns one step.
• The sheet title shows the schema when it differs from the current one.
• Composite and cross-schema keys: the preview and Open Table match every column pair, in the key's own schema. SQL Server and Oracle now report the referenced schema. MySQL reads keys, columns and indexes from the database asked for, below 5.1.10 too.
• SQLite: a shorthand REFERENCES parent points at the parent's primary key, and the pairs of a composite key share one name.
• Filters: SQL Server [col] closes with ], MySQL doubles backslashes, and a number-like value against a text column is quoted ('02134') from the column's type.
• The table browser reads columns, keys and full values in its own schema, and a slow row count no longer overwrites a newer load's total.
• A row whose primary key is binary or truncated offers no Edit or Delete, instead of a save that reports success and changes nothing.
• Switching database rebuilds the table browser, and the database menu is off while a row edit has changes.

Test plan

• Fail on main, pass here: FilterSQLGeneratorTests (TableProCore), SQLBuilderFilterLiteralTests, SQLBuilderSingleRowLookupTests, SQLiteDriverFileTests, MySQLForeignKeyCatalogTests, MySQLColumnListingTests, MySQLDriverLegacyServerTests, DataBrowserViewModelTests, RowDetailViewModelTests, ForeignKeyReferenceTests, ForeignKeyPreviewModelTests, TableBrowserIdentityTests.
• DataBrowserViewModelTests primaryKeyExtraction is rewritten for primaryKeyValues(forRowAt:), which replaces the old single-value API.
• iPhone 18 Pro simulator, iOS 27.0, Chinook sample: Invoice row, Customer.CustomerId, then Open Table. Customer opens filtered to CustomerId = 2 (Filter badge 1) with the row on screen, "1 of 1", Edit available. Back returns to the filtered list, then to Invoice. SupportRepId in the sheet links to Employee.

	Light	Dark
Before: preview sheet
After: preview sheet
After: Open Table, row screen
After: Back to the filtered list

Fixes #3636

Not in this PR

• PostgreSQL bit(n) filter columns still compare bare (= 101), which has no operator. Main does the same for user filters, and MySQL BIT needs the bare form. Open Table on such a key shows the browser's load error.
• A SQLite parent key column with no type that holds integers: the preview's quoted lookup finds no row, as on main, so Open Table stays off.
• Mac: SQLiteForeignKeyGrouping.resolvedNames keeps a declared name equal to another key's positional fk_<table>_<id>, so the schema editor groups two keys as one composite key. iOS no longer passes the DDL.
• TableProQuery/SQLStatementGenerator.swift and TableQueryBuilder.swift repeat the old [ quoting and number guessing, but nothing calls them.