claude@clouddev1
9c4857eb50
ParseError::Invalid gains an `expected: Vec<String>` field —
the human-rendered names of the patterns chumsky was looking
for at the failure point (`\`create\``, `identifier`, etc.).
Empty for custom errors, which have no expected-set framing.
Populated by a new `describe_expected()` helper in parser.rs
that humanise() also delegates to (eliminates duplication).
`input_render::ambient_hint(input) -> Option<String>` returns
the hint-panel content per ADR-0022 §6:
- empty input → None (caller falls back to panel.hint_empty);
- Valid → t!("hint.ambient_complete") ("submit with Enter");
- IncompleteAtEof → t!("hint.ambient_expected", expected = …)
listing the parser's expected next tokens, oxford-joined;
- DefiniteErrorAt → t!("hint.ambient_error_with_usage", …)
composing the parse-error message with the matching
parse.usage.* template if a known entry keyword was
consumed, else the bare message.
Catalog gains the three hint.ambient_* keys + validator
declarations.
ui::render_hint_panel resolution order:
1. explicit app.hint (modal contexts) wins;
2. simple-mode + non-empty input → ambient_hint;
3. fallback to panel.hint_empty.
Advanced mode (persistent + one-shot `:`) bypasses ambient
hinting per ADR-0022 §12.
Snapshot: highlighted_input_all_token_classes rebaselined
because the hint panel now displays an ambient hint instead
of the empty placeholder when input is non-empty.
Tests: 698 passing, 0 failing, 1 ignored (693 baseline →
+5 ambient_hint cases). Clippy clean.
Stage 6 introduces the IdentSlot taxonomy + parser audit so
identifier-typed slots can yield schema-aware completion
candidates in stage 8.