docs(05): capture phase context

Phase 05: Search
- Implementation decisions documented
- Phase boundary established

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.planning/phases/05-search/05-CONTEXT.md

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+# Phase 5: Search - Context
+
+**Gathered:** 2026-01-31
+**Status:** Ready for planning
+
+<domain>
+## Phase Boundary
+
+Users can find entries through text search and filtering. Includes search by text in title/content, filter by tag, filter by date range, and filter by entry type (task/thought). Search results show matching text highlighted.
+
+</domain>
+
+<decisions>
+## Implementation Decisions
+
+### Search UI Location
+- Search bar always visible at top, above entry list
+- Inline filters visible alongside search (tags, type, date range)
+- Clear/reset button appears only when filters are active
+- Mobile layout: Claude's discretion
+
+### Filter Behavior
+- Multiple tag filters combine with AND (entry must have ALL selected tags)
+- Filters are session-only (not persisted in URL, reset on reload)
+- Date range: Quick presets (Today, This week, This month) plus custom range option
+- Type filter: Three-state toggle (Tasks / Thoughts / All), default is All
+
+### Results Display
+- Filter in place — same list view, just fewer entries shown (seamless)
+- Matching text highlighted with bold (not background highlight)
+- Empty state: Friendly message "No entries match your search"
+- When searching/filtering: Flat list, pinned entries do NOT stay at top
+
+### Type-ahead Experience
+- Instant search as you type (debounced)
+- Minimum 2 characters before search triggers
+- Recent searches: Show last 5 searches as quick picks
+- Keyboard shortcut: `/` key focuses search (like GitHub)
+
+### Claude's Discretion
+- Mobile filter layout (horizontal scroll vs collapsed)
+- Debounce timing
+- Exact empty state wording
+- Recent searches storage mechanism
+
+</decisions>
+
+<specifics>
+## Specific Ideas
+
+- "/" key to focus search (GitHub-style)
+- Presets for date range similar to analytics dashboards: Today, This week, This month
+
+</specifics>
+
+<deferred>
+## Deferred Ideas
+
+None — discussion stayed within phase scope
+
+</deferred>
+
+---
+
+*Phase: 05-search*
+*Context gathered: 2026-01-31*