Bug: Command palette search field does not filter results (Cmd+P project switcher)

[willzhqiang]

Description

The Cmd+P project switcher (and the general command palette) does not filter results when typing in the search field. All items disappear immediately after entering any character.

Steps to Reproduce

1. Have 2+ projects open in Mori
2. Press Cmd+P to open the project switcher
3. Observe that all projects are listed correctly (e.g. dotfiles, work)
4. Type any character (e.g. d to filter for dotfiles)

Expected: The list filters to show matching projects (e.g. dotfiles for query d)
Actual: The list becomes empty — no results are shown

This also affects the full command palette (Cmd+Shift+P).

Screenshots

Before typing — projects listed correctly:

After typing d — all results disappear:

Analysis

The code path is:

1. controlTextDidChange → updateResults() → dataSource?.search(query:)
2. search() calls FuzzyMatcher.score(query:candidate:) on each item's title

FuzzyMatcher unit tests pass and the algorithm should return positive scores for valid matches (e.g. score(query: "d", candidate: "dotfiles") → 42 by manual trace). The issue is likely that controlTextDidChange is not firing, or searchField.stringValue is not synced with the field editor during editing.

Possible root cause: NSPanel configured with .nonactivatingPanel style mask + becomesKeyOnlyIfNeeded = true may interfere with the NSTextField delegate notification chain. In some macOS versions, the field editor inside a floating panel may not properly trigger controlTextDidChange, or stringValue may return stale content during active editing.

Relevant files

• Sources/Mori/App/CommandPaletteController.swift — panel setup, controlTextDidChange, updateResults()
• Sources/Mori/App/CommandPaletteDataSource.swift — search(query:) method
• Packages/MoriCore/Sources/MoriCore/FuzzyMatcher.swift — scoring algorithm

Environment

• Mori v0.4.1
• macOS Tahoe 26.3.1

[willzhqiang]

这个功能不太稳定，有的时候搜索 d 可以过滤出 dotfiles，有的时候又不行，但输入 w，却怎么也搜不到 work。