Add interactive TUI browser for tasks, contracts, and files (makima view) (#7)

* feat(tui): Implement fuzzy search with real-time filtering and highlighting

Adds comprehensive fuzzy search functionality to the TUI browser:

## Fuzzy Matching (fuzzy.rs)
- FuzzyMatcher wrapper using SkimMatcherV2 from fuzzy-matcher crate
- fuzzy_match() returns score and matched character indices
- fuzzy_match_all() supports multi-term search (space-separated)
- Recency-aware scoring to boost recent items in results
- Unit tests for all matching scenarios

## App State (app.rs)
- FilteredItem struct with index, score, and matched_indices
- apply_filter() uses fuzzy matching with score-based sorting
- match_count() and has_no_matches() helper methods
- Results sorted by match score (highest first)

## List View (list_view.rs)
- Highlighted matched characters in search results
- Yellow bold styling for matched chars
- Status icons with color coding

## Search Input (search_input.rs)
- Real-time match count display (X/Y matches)
- Visual feedback for no matches (red border)
- Placeholder text when search is empty
- Active search mode indication (yellow border)

## Event Handling (event.rs)
- Arrow key navigation while in search mode
- Ctrl+K/J for vim-style navigation during search
- Delete key support alongside backspace
- Ctrl+U to clear search query
- Tab toggles preview while searching
- Escape clears search and exits search mode

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

* Task completion checkpoint

* [WIP] Heartbeat checkpoint - 2026-01-19 11:20:34 UTC

* Task completion checkpoint

* [WIP] Heartbeat checkpoint - 2026-01-19 11:31:19 UTC

* Task completion checkpoint

* [WIP] Heartbeat checkpoint - 2026-01-19 11:39:07 UTC

* fix(tui): Fix module exports and main binary integration

- Update mod.rs to properly export app, event, fuzzy, and ui modules
- Add run() function for TUI entry point
- Fix run_view() to use ViewCommand enum instead of ViewArgs
- Fix event handling to use poll_event and handle_key_event

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

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

1 files changed, 217 insertions, 0 deletions

diff --git a/makima/src/daemon/tui/fuzzy.rs b/makima/src/daemon/tui/fuzzy.rs
new file mode 100644
index 0000000..44c27ad
--- /dev/null
+++ b/makima/src/daemon/tui/fuzzy.rs
@@ -0,0 +1,217 @@
+//! Fuzzy matching wrapper for search functionality.
+//!
+//! This module provides a wrapper around the `fuzzy-matcher` crate's
+//! `SkimMatcherV2` algorithm, offering:
+//!
+//! - Single-term fuzzy matching with score and matched indices
+//! - Multi-term search (space-separated patterns)
+//! - Recency-adjusted scoring for time-aware results
+//! - Case-insensitive matching by default
+//!
+//! # Examples
+//!
+//! ```
+//! use makima::daemon::tui::fuzzy::FuzzyMatcher;
+//!
+//! let matcher = FuzzyMatcher::new();
+//!
+//! // Single pattern matching
+//! if let Some((score, indices)) = matcher.fuzzy_match("hello world", "hlo") {
+//!     println!("Score: {}, Matched positions: {:?}", score, indices);
+//! }
+//!
+//! // Multi-term search
+//! if let Some(score) = matcher.fuzzy_match_all("fix authentication bug", "fix bug") {
+//!     println!("All terms matched with score: {}", score);
+//! }
+//! ```
+
+use fuzzy_matcher::skim::SkimMatcherV2;
+use fuzzy_matcher::FuzzyMatcher as FuzzyMatcherTrait;
+
+/// Fuzzy matcher wrapper providing search functionality.
+///
+/// Wraps the `SkimMatcherV2` algorithm which provides:
+/// - Smart case matching (case-insensitive unless pattern has uppercase)
+/// - Word boundary bonuses
+/// - Consecutive character bonuses
+pub struct FuzzyMatcher {
+    matcher: SkimMatcherV2,
+}
+
+impl FuzzyMatcher {
+    /// Create a new fuzzy matcher with default settings.
+    pub fn new() -> Self {
+        Self {
+            matcher: SkimMatcherV2::default(),
+        }
+    }
+
+    /// Match a pattern against a string, returning score and matched indices.
+    ///
+    /// Returns `Some((score, indices))` if the pattern matches, where:
+    /// - `score` is a relevance score (higher is better)
+    /// - `indices` are the positions of matched characters in the text
+    ///
+    /// Returns `None` if the pattern doesn't match the text.
+    ///
+    /// # Arguments
+    ///
+    /// * `text` - The text to search in
+    /// * `pattern` - The pattern to search for
+    pub fn fuzzy_match(&self, text: &str, pattern: &str) -> Option<(i64, Vec<usize>)> {
+        self.matcher.fuzzy_indices(text, pattern)
+    }
+
+    /// Match multiple patterns (space-separated) against a string.
+    ///
+    /// All patterns must match for the function to return a score.
+    /// The returned score is the sum of individual pattern scores.
+    ///
+    /// # Arguments
+    ///
+    /// * `text` - The text to search in
+    /// * `patterns` - Space-separated patterns (e.g., "fix bug" matches both "fix" and "bug")
+    ///
+    /// # Returns
+    ///
+    /// `Some(total_score)` if all patterns match, `None` otherwise.
+    pub fn fuzzy_match_all(&self, text: &str, patterns: &str) -> Option<i64> {
+        let patterns: Vec<&str> = patterns.split_whitespace().collect();
+
+        if patterns.is_empty() {
+            return Some(0);
+        }
+
+        let mut total_score = 0i64;
+
+        for pattern in patterns {
+            if let Some((score, _)) = self.matcher.fuzzy_indices(text, pattern) {
+                total_score += score;
+            } else {
+                return None;
+            }
+        }
+
+        Some(total_score)
+    }
+
+    /// Calculate a recency-adjusted score for time-aware sorting.
+    ///
+    /// Items with lower indices (more recent) receive a bonus to their score,
+    /// making them rank higher in search results.
+    ///
+    /// # Arguments
+    ///
+    /// * `base_score` - The original fuzzy match score
+    /// * `index` - The item's position in the list (0 = most recent)
+    /// * `total_items` - Total number of items in the list
+    ///
+    /// # Returns
+    ///
+    /// An adjusted score that factors in recency.
+    pub fn recency_adjusted_score(base_score: i64, index: usize, total_items: usize) -> i64 {
+        if total_items == 0 {
+            return base_score;
+        }
+
+        // Recency bonus: items at the beginning get up to 20% bonus
+        // Formula: bonus = base_score * 0.2 * (1 - index/total_items)
+        let recency_factor = 1.0 - (index as f64 / total_items as f64);
+        let bonus = (base_score as f64 * 0.2 * recency_factor) as i64;
+
+        base_score + bonus
+    }
+}
+
+impl Default for FuzzyMatcher {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_fuzzy_match_exact() {
+        let matcher = FuzzyMatcher::new();
+        let result = matcher.fuzzy_match("hello world", "hello");
+        assert!(result.is_some());
+    }
+
+    #[test]
+    fn test_fuzzy_match_partial() {
+        let matcher = FuzzyMatcher::new();
+        let result = matcher.fuzzy_match("authentication", "auth");
+        assert!(result.is_some());
+    }
+
+    #[test]
+    fn test_fuzzy_match_no_match() {
+        let matcher = FuzzyMatcher::new();
+        let result = matcher.fuzzy_match("hello", "xyz");
+        assert!(result.is_none());
+    }
+
+    #[test]
+    fn test_multi_term_search() {
+        let matcher = FuzzyMatcher::new();
+        let result = matcher.fuzzy_match_all("fix authentication bug", "fix bug");
+        assert!(result.is_some());
+    }
+
+    #[test]
+    fn test_case_insensitive() {
+        let matcher = FuzzyMatcher::new();
+        let result = matcher.fuzzy_match("Hello World", "hello");
+        assert!(result.is_some());
+    }
+
+    #[test]
+    fn test_recency_bonus() {
+        // Earlier items (lower index) should get higher recency bonus
+        let score1 = FuzzyMatcher::recency_adjusted_score(100, 0, 50);
+        let score2 = FuzzyMatcher::recency_adjusted_score(100, 10, 50);
+        assert!(score1 > score2);
+    }
+
+    #[test]
+    fn test_fuzzy_match_returns_indices() {
+        let matcher = FuzzyMatcher::new();
+        let result = matcher.fuzzy_match("hello world", "hlo");
+        assert!(result.is_some());
+        let (_, indices) = result.unwrap();
+        // Should have matched 3 characters
+        assert_eq!(indices.len(), 3);
+    }
+
+    #[test]
+    fn test_multi_term_empty_pattern() {
+        let matcher = FuzzyMatcher::new();
+        let result = matcher.fuzzy_match_all("hello world", "");
+        assert!(result.is_some());
+        assert_eq!(result.unwrap(), 0);
+    }
+
+    #[test]
+    fn test_multi_term_partial_match_fails() {
+        let matcher = FuzzyMatcher::new();
+        // "xyz" doesn't match, so the whole search should fail
+        let result = matcher.fuzzy_match_all("fix authentication bug", "fix xyz");
+        assert!(result.is_none());
+    }
+
+    #[test]
+    fn test_recency_bonus_edge_cases() {
+        // Zero total items should return base score
+        let score = FuzzyMatcher::recency_adjusted_score(100, 0, 0);
+        assert_eq!(score, 100);
+
+        // Last item should get minimal bonus
+        let score_last = FuzzyMatcher::recency_adjusted_score(100, 49, 50);
+        let score_first = FuzzyMatcher::recency_adjusted_score(100, 0, 50);
+        assert!(score_first > score_last);
+    }
+}