Adds idx/fts/<token>/<ts>-<id> hardlinks and an FTS-driven query path.
- FsSearchTokenizer: lowercase + Unicode-aware split on non letter-or-
digit, matching SQLite FTS5's unicode61 default closely enough that
the same call indexes content and parses queries (any drift cancels).
Tokens capped at 100 chars to keep filenames under FS limits.
- FsLayout: idxFts + ftsEntry / ftsTokenDir helpers; skeleton dir.
- FsIndexer.pathsFor: when event implements SearchableEvent, emits one
hardlink per unique tokenised word — so insert/delete maintenance
rides the existing link/unlink path. Eviction (replaceable swap),
NIP-09 cascade and NIP-62 vanish all clean up FTS for free.
- FsQueryPlanner: when filter.search is non-blank, drives by FTS.
Tokenises the query, walks each idx/fts/<token>/ listing into a
HashMap<id, ts>, and intersects smallest-first (AND across tokens —
matching SQLite FTS5 default MATCH semantics). Output sorted by
createdAt DESC. Other Filter fields (kinds, authors, tags, since /
until) still apply via Filter.match post-filter.
Tests: 16 new in FsSearchTest covering tokenizer (whitespace, case,
unicode, punctuation, empty), index maintenance (entries created,
non-searchable kinds skipped, delete unlinks), and query semantics
(single token, AND of tokens, ordering, limit, kind/author compose,
no-match, blank string ignored, reopen). 86 fs tests green.
Claude
d5a806a5c3