⚡ Bolt: Add itemPathBitflags for fuzzy matching early exit

[AhmmedSamier]

💡 What: Added an itemPathBitflags parallel array to the SearchEngine. It calculates and stores the character bitmask specifically for the relativeFilePath property. The tryFuzzyMatchPath method now uses this bitmask to perform an O(1) early-exit check before running the expensive fuzzysort algorithm.
🎯 Why: Previously, tryFuzzyMatchPath had to run the fuzzysort algorithm on paths even if they didn't contain the necessary characters, as long as the overall item passed the aggregate itemBitflags check (which could happen if the missing characters existed in the name or fullName). This avoids executing expensive regex and array allocations for paths that definitely won't match.
📊 Impact: Reduces CPU cycles spent on fuzzysort by quickly discarding paths that do not contain all the query characters.
🔬 Measurement: Verified by running all unit tests in the language-server which confirm that the search engine still returns accurate results while benefiting from the early-exit optimization.

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PR created automatically by Jules for task 9245149041969347036 started by @AhmmedSamier

Summary by CodeRabbit

• Bug Fixes

  • Improved fuzzy search filtering for file paths, reducing incorrect matches caused by overly broad eligibility checks.

• Performance

  • Optimized search readiness checks so path matching avoids unnecessary fuzzy evaluations, making searches more efficient while preserving results.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: c61ddebc-f35d-4fe7-be54-d5b9d172099d

📥 Commits

Reviewing files that changed from the base of the PR and between 124aa21 and b0cc2b7.

📒 Files selected for processing (2)

• .jules/bolt.md
• language-server/src/core/search-engine.ts

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📝 Walkthrough

Walkthrough

SearchEngine now maintains path-specific bitflags for each indexed item, computes them from relativeFilePath, and uses them to skip impossible path fuzzy matches before invoking Fuzzysort.

Changes

Path bitflag search optimization

Layer / File(s)	Summary
Path bitflag storage and computation language-server/src/core/search-engine.ts	Adds itemPathBitflags, computes pathFlags, incorporates them into aggregate flags, and keeps the array synchronized during item updates, clearing, and cache accounting.
Path fuzzy-match eligibility gating language-server/src/core/search-engine.ts, .jules/bolt.md	Passes path bitflags into search context and skips Fuzzysort when path query flags cannot match; documents the optimization.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• AhmmedSamier/DeepLens#582: Directly overlaps in adding itemPathBitflags and path fuzzy-match early gating.
• AhmmedSamier/DeepLens#583: Implements the same path bitflag search flow.
• AhmmedSamier/DeepLens#519: Applies the analogous property-specific bitflag pattern to full-name matching.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main change: adding itemPathBitflags to support fuzzy-matching early exit.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch bolt-item-path-bitflags-9245149041969347036

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