[its-janghoon]

What this changes

The window is laid out like Redrob Canvas. One theme owned by the shell (canvas's Pro tokens, dark and light grounds following the system with a Help > Theme override; Inter for the interface, JetBrains Mono for SQL and grid cells, a system CJK fallback), a thin top bar with File / Connection / Query / View / Help menus and a right slot (active connection with its read-only / read-write badge beside the Redrob account), the connections tree (grouped, connect-state dots, filter) and the active connection's schema tree (database > schema > tables > columns; double-click inserts; Select top 100 / Copy name / DDL) on the left, tabbed editors (Ctrl+T / Ctrl+W / Ctrl+1…9, tab shows connection + dirty dot) with Grid / Messages / Changes under a splitter, the Ask dock on the right (Ctrl+Shift+A), a status line at the bottom.

Run: Ctrl+Enter / F5 runs all / Esc cancels (Pending::cancel in the engine, the one core change). Errors go to the Messages tab and a red status line; no error dialog. Grid: monospace, header sort, column drag, cell select, Ctrl+C cell / rows as TSV, NULL dim italic, ellipsis + tooltip, row range + page controls. Changes tab shows a badge count and the SQL the engine will run before Apply. First run: empty state with New connection; the form is a modal with Test and inline errors. View > History (click to insert), Help > Shortcuts. All strings en + ko.

The release uploads redrob-query.png and passes launcher_icon to the shared publish job (needs redrob-labs/.github#14).

Why

The 0.3.0 shell was a first egui port with egui's stock look and a flat layout; Canvas sets the shape the product apps share.

How it was verified

cargo fmt --all --check
cargo clippy --workspace --all-targets -- -D warnings
cargo test --workspace            # 100 passed, 7 ignored
cargo build --release -p redrob-query

Run once on :0 against a throwaway SQLite file (no PostgreSQL / MySQL / MongoDB on this host).

Checklist

• No credentials, connection strings, or real database contents in the diff, the tests, or the commit messages.
• Read-only guarantees preserved: typed queries still go through the engine's read-only gate, and writes only through reviewed edits and the structure forms.
• Local-storage behaviour: language.json (Help > Language) and the theme key in workspace.json; README tables updated.
• User-visible strings name Redrob Query.