GeezerVison

SqliteTableModel::setTypedData() accessed m_cache with at(). The cache is
sparse and rows beyond the loaded chunk are valid model rows (rowCount()
includes them), so editing such a row, e.g. by pasting a large clipboard,
raised std::out_of_range ("no matching segment found") and terminated the
application.

Load the row first (triggerCacheLoad + waitUntilIdle, as find() already
does) and skip the edit if it is still not available.

Add a test-table-model target covering both an uncached and a cached row.

Fixes sqlitebrowser#3892

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>

The test used QTEST_MAIN, which needs a Qt platform plugin and aborted on
the headless CI runners. Select the offscreen platform in main() unless
QT_QPA_PLATFORM is already set.

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>

create() closes the sqlite3 handle and then calls open(), which closes
the dangling handle a second time. That crashed the test on Windows CI.
Open an empty database file instead.

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>

DBBrowserDB::create() closed the sqlite3 handle but left _db pointing at
it, so the open() call that follows saw an open database and closed the
stale handle a second time. This is undefined behaviour; it showed up as
the warning "Database didn't close correctly" on Linux and crashed a test
on Windows.

Reset _db after closing it, and add a test that create() does not
produce any warning.

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>

test-global-filter needs the CMake prefix paths on PATH on Windows
because the CI jobs build SQLite as a DLL there. test-table-model links
SQLite too and crashed on Windows without them.

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>

The .ui files connect to slots that don't exist in Qt6 (QDialog::help)
unless uic generates string based connections. The main target already
sets this option for Qt6, but test-table-model compiles CipherDialog.ui
as well and failed to build in the Windows on ARM job.

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>