Shortcuts: chords with Shift and a punctuation key fire as typed

[theironchef]

Fixes #280.

Problem: egui reports the character a key types. With Shift held on US-style layouts:

• [, ] and / arrive as OpenCurlyBracket, CloseCurlyBracket and Questionmark;
• ` arrives as the text ~.

shortcuts::consume matched the parsed chord exactly, with an allowance only for + (#83). The single-key path looked up the typed text, which doesn't normalize to Shift+~. So four defaults never fired from the keyboard: Bring to Front (Cmd+Shift+]), Send to Back (Cmd+Shift+[), Search Commands (Cmd+Shift+/, which the hint bar advertises) and the Curvature tool (Shift+~).

Change (crates/ui-egui/src/shortcuts.rs, shortcut_editor.rs)

• consume also accepts the shifted character for a chord that holds Shift: [→{, ]→}, /→?, ;→: and \→|, next to the existing =→+.
• Single-key tool and command shortcuts also look up Shift+<typed text>, after the existing lookups, so ~ typed with Shift finds Shift+~. Keys bound to the character itself, like + for Add Anchor Point, still win.
• The Keyboard Shortcuts editor records such a chord as its key: Cmd+Shift+], not Cmd+Shift+}. That's the form the defaults use, so conflicts are reported.

Non-US layouts, where these characters sit on other keys, aren't addressed here.

Tests

• New shortcuts::tests::shifted_punctuation_shortcuts_work_as_typed:
  • Cmd+Shift+} / { bring the selection to the front and send it to the back;
  • Cmd+Shift+? opens Search Commands;
  • the text ~ with Shift selects the Curvature tool;
  • the editor records Cmd+Shift+} as Cmd+Shift+] and Cmd+Shift+? as Cmd+Shift+/.
• Without the aliases, the test fails ("Bring to Front": order unchanged).
• cargo test -p vectorcraft-ui-egui: 555 passed.
• cargo clippy -p vectorcraft-ui-egui --all-targets -- -D warnings (Rust 1.99): clean.
• cargo fmt --all -- --check: clean.
• Checked by hand in a release build on Windows 11 (US layout) with real keys:
  • Ctrl+Shift+] → "Bring to Front" and Ctrl+Shift+[ → "Send to Back" (History and stacking order);
  • Ctrl+Shift+/ opens the command palette;
  • Shift+` selects the Curvature tool.
  • Before the change, all four did nothing in the same build setup.

I didn't run the full cargo xtask ci (wasm step) here.

🤖 Generated with Claude Code

[bflatastic]

Thanks @theironchef, merged! I rebased it on main and added a note to the M14 row of the ROADMAP. I checked it live in the app: Cmd+Shift+} and Cmd+Shift+{ bring to front and send to back, Cmd+Shift+? opens Search Commands, and Shift+~ picks the Curvature tool. Keeping the original chord and only adding the shifted aliases means nothing changes for other layouts.