P8 resolved (SPEC §11): lazy + background indexing with progress.
Initial scan runs in a tokio task spawned from `initialized`; the
server stays responsive immediately and nav features answer with
partial data until the index is complete.
WorkspaceIndex (`index.rs`):
- Per-URI `IndexedPage` keeps name, title, headings, outgoing links.
- Reverse maps: `pages_by_name`, `backlinks: HashMap<page, …>`.
- `upsert` scrubs stale entries first so re-parses don't leak.
- `resolve` handles Wiki + AnchorOnly link kinds against the index;
other kinds (Interwiki/Diary/File/Local/Raw) fall through.
- `slugify` for anchors (lowercases, collapses runs, drops trailing
dashes, preserves Unicode), `page_name_from_uri` for workspace-
rooted names, `walk_wiki_files` for the background scanner.
Backend wiring (`lib.rs`):
- `initialize` captures workspace root from `workspaceFolders` or the
deprecated `root_uri`; advertises definition/references/hover/
completion (trigger `[`)/workspace_symbol providers.
- `initialized` spawns the indexer, wrapped in
`window/workDoneProgress` begin/end notifications.
- `did_open`/`did_change` synchronously update the index alongside
publishing diagnostics; `did_close` keeps the indexed projection
(file may still exist on disk and other pages link to it) and
only clears diagnostics + drops the live document state.
Position lookup (`nav.rs`):
- `lsp_to_byte_pos` translates between LSP encoding (UTF-8 or
UTF-16) and our byte columns.
- `find_inline_at` descends blocks → inlines → inline containers,
returning the most specific inline whose span covers the cursor.
Handlers:
- definition: wikilinks resolve to a target URI; anchored links
return the range at the matching heading.
- references: backlinks of the cursor's link target, or of the
current page when the cursor isn't on a link. Ranges fall back
to byte-column LSP positions when the source doc isn't open.
- hover: markdown preview with page title + outline (first 8
headings), or a "not in index" fallback.
- completion: fires only inside an unterminated `[[ … ` on the
current line; suggests every indexed page name.
- workspace/symbol: case-insensitive substring over every indexed
heading.
Tests (20 new): slugify (basic / punctuation / Unicode / trailing
dash), page-name derivation under various roots, upsert / replace /
remove, resolve for Wiki + AnchorOnly, sorted `page_names`, UTF-8
passthrough + UTF-16 conversion, position lookup hits and misses.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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