Reorganize workspace and archive skill artifacts

openspec/changes/knowledge-index-panel/specs/knowledge-search/spec.md

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+## ADDED Requirements
+
+### Requirement: Full-text search
+The system SHALL provide a text input that filters knowledge entries in real-time as the user types. Filtering SHALL match against both metadata (title, tags) and the full body text of each knowledge entry.
+
+#### Scenario: Search matches entry title
+- **WHEN** user types "matt" in the search input
+- **THEN** only entries whose title or body contains "matt" (case-insensitive) are displayed
+
+#### Scenario: Search matches entry body text
+- **WHEN** user types "三层加载" in the search input
+- **THEN** all entries whose body text contains "三层加载" are displayed
+
+#### Scenario: Search matches tag
+- **WHEN** user types "Claude Code" in the search input
+- **THEN** all entries tagged with "Claude Code" are displayed, along with entries mentioning it in body text
+
+#### Scenario: No results found
+- **WHEN** user types a keyword that matches no entry
+- **THEN** the system SHALL display a "没有找到相关条目" (no results) message
+
+#### Scenario: Clearing search restores all entries
+- **WHEN** user clears the search input
+- **THEN** all entries are displayed again in their original order (date descending)
+
+#### Scenario: Search is case-insensitive
+- **WHEN** user types "CLAUDE" or "claude" or "Claude"
+- **THEN** the system SHALL return the same results regardless of case
+
+### Requirement: Highlight matched text
+The system SHALL visually highlight the portion of text that matched the search query in each displayed result.
+
+#### Scenario: Single word match
+- **WHEN** user searches for "skill" and an entry title is "Matt Pocock Skills"
+- **THEN** the word "Skills" in the title is visually highlighted
+
+#### Scenario: Multi-word query
+- **WHEN** user searches for "ai agent" (two words)
+- **THEN** entries containing both words are prioritized and matched text is highlighted