Introduce EditorSettings as the effective, source-agnostic editor configuration
the editor and save path obey. .editorconfig is demoted to one *source*
(editorconfig.dart now returns EditorSettings); editor_settings_resolver.dart is
the single composition seam where future sources — a settings panel, a clide
settings file — layer in via merge() without the editor changing.
The registry resolves settings on buffer load and, when a .editorconfig is saved
in-app, re-resolves every open buffer and emits editor.settings-changed (a hook
in save, not a filesystem watcher — the realistic case, cheaply). Buffer JSON
carries editorSettings. 100% line coverage on the new model + resolver.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
New lib/src/editor/editorconfig.dart: a dependency-free INI parser, an
EditorConfig-flavour glob matcher (*, **, ?, [seq], {a,b}, {m..n}), and
directory-walk resolution honouring root=true with nearest-file / last-section
precedence. EditorRegistry resolves the config when a buffer opens (exposed on
the buffer JSON for the UI) and applies end_of_line / trim_trailing_whitespace /
insert_final_newline on save, reconciling the in-memory buffer when the text
changes. 100% line coverage on the new file.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
EditorBuffer + Selection + EditorRegistry hold the daemon-side
active-file model (D-006 subsystem 'editor'). Active buffer
tracking means `clide insert "…"` and `clide replace-selection
"…"` target the UI's focused file without the caller supplying an
id. Mutations mark buffers dirty; editor.save writes back to disk
through the workspace root; events fire on every state change so
subscribers can mirror.
IPC surface matches CLAUDE.md's tier-2 list + the natural extras
(list, read, activate, set-selection, set-content, close). Tests
cover open-idempotence, insert at caret, replace-selection range
swap, dirty→save→clean round-trip, close picks a new active
buffer, out-of-range selection clamping.
69 core tests pass.
Co-Authored-By: Claude <noreply@anthropic.com>