v0.6.0: Fuzzy Remix

Added

• Fuzzy Search Engine: mneme find now auto-corrects typos in search queries before executing. If a query term isn't found in the index, the engine substitutes the closest matching term and re-runs the search, printing a "Typo detected — did you mean…" hint to the user.
• internal/query/fuzzy.go: New package providing the core auto-correction pipeline — GetVocabulary, ExpandTokensWithFuzzy, and AutoCorrectQuery — which orchestrate candidate lookup, distance scoring, and query rewriting.
• Trigram Index (internal/utils/trigram.go): Character-trigram index over the full indexed vocabulary for fast O(1) candidate pre-filtering. Uses the Dice coefficient (TrigramSimilarityThreshold = 0.3) to short-circuit Levenshtein evaluation on dissimilar terms.
• Damerau-Levenshtein Distance (internal/utils/levenshtein.go): Replaced the standard Levenshtein implementation with the Optimal String Alignment variant of Damerau-Levenshtein, which counts adjacent transpositions (e.g., "uesr" → "user") as a single edit, improving correction accuracy for common finger-slip typos.
• Dynamic Edit-Distance Thresholding: Fuzzy matching applies a length-aware maximum edit distance — distance 1 for terms of 4–5 characters, distance 2 for terms of 6+ characters — to control false-positive corrections on short words.
• Compound Identifier Correction: Query terms that look like camelCase or snake_case identifiers are split into constituent parts, each part is independently corrected, and then recombined. This prevents over-eager fuzzy correction of technical identifiers.
• Fuzzy Constants (internal/constants/fuzzy.go): Centralised tuning knobs — FuzzyMaxEditDistance, FuzzyMinTermLength, TrigramSimilarityThreshold, and FuzzyScorePenalty — making it easy to adjust matching behaviour without touching algorithm code.
• Expanded Default Ignore List: Added target, build, and dist to the default crawler ignore list in internal/config/load.go to avoid indexing common build-output directories.
• Binary Download Instructions in README.md: Added a "Using a pre-built binary" section for users who do not have Go installed, covering Linux, macOS (Intel & Apple Silicon), and Windows.
• Updated Logo: Replaced the placeholder logo with a high-resolution asset (assets/logo.png).

Changed

• Find Command Fallback: Fixed the fallback path in internal/cli/find.go so that corrected search terms (not the original raw doc.MatchedTerms) are passed to display.FormatSearchResult on the first attempt. The original matched terms are only used as a fallback if the corrected highlight fails.
• Fuzzy Score Penalty: Fuzzy-matched tokens are penalised by a configurable factor (FuzzyScorePenalty = 0.8) so that exact matches always rank above auto-corrected results.
• Tokenizer Hardening: Updated internal/index/tokenizer.go to avoid splitting compound identifiers that are present as a single entry in the index, preventing ghost tokens that pollute fuzzy candidate lists.

Fixed

• allCorrected Never Reset: Fixed a logic bug in AutoCorrectQuery where allCorrected was initialised to true but never set to false when a query part matched exactly or had no suitable correction, making the recombine guard condition always hold. Now allCorrected is correctly set to false in both the exact-match and no-candidate branches.
• Damerau vs. Standard Levenshtein: Replaced calls to the old LevenshteinDistance helper with DamerauLevenshteinDistance and IsWithinDamerauDistance throughout internal/query/fuzzy.go, fixing cases where single-transposition typos were incorrectly counted as two edits and thus rejected.
• Config Ignore List Test: Updated internal/core/config_test.go to expect the expanded nine-entry default ignore list, aligning the test with the updated load.go defaults.