Fix Ctrl+C copy shortcut in SQL editor log/statistics view

[Copilot]

The Edit menu's Ctrl+C accelerator intercepted the keypress and called OnMenuCopy, which had no handler for vmLogCtrl mode — so copy was silently dropped. Ctrl+Insert worked because it bypasses the wxWidgets menu accelerator system and is handled directly by Scintilla's internal key map.

Changes

• OnMenuCopy: Added vmLogCtrl branch to call styled_text_ctrl_stats->Copy(), consistent with how OnMenuSelectAll already handled all three view modes.
• OnMenuUpdateCopy: Added vmLogCtrl branch to enable the Copy menu item when text is selected in the stats control, using GetSelectionStart() != GetSelectionEnd() (same pattern as TextControl::OnCommandUpdateCopy).

// Before
void ExecuteSqlFrame::OnMenuCopy(...) {
    if (viewModeM == vmEditor)
        styled_text_ctrl_sql->Copy();
    else if (viewModeM == vmGrid)
        grid_data->copyToClipboard(false);
    // vmLogCtrl: nothing — Ctrl+C silently dropped
}

// After
void ExecuteSqlFrame::OnMenuCopy(...) {
    if (viewModeM == vmEditor)
        styled_text_ctrl_sql->Copy();
    else if (viewModeM == vmLogCtrl)
        styled_text_ctrl_stats->Copy();
    else if (viewModeM == vmGrid)
        grid_data->copyToClipboard(false);
}

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