refactor(search): polish search results rendering with semantic Theme styles

Phase 5 of the UX overhaul. Migrates search result display from raw
console styling to the centralized Theme system with semantic methods,
improving visual consistency and readability.

Search result changes:
- Type badges now use semantic styles (issue_ref, mr_ref) with
  fixed-width alignment for clean columnar layout
- Snippet rendering uses Theme::highlight() for matched terms and
  Theme::muted() for surrounding context, replacing bold+underline
- Metadata line uses Theme::username() for authors and per-part
  styling with middle-dot separators instead of a single dim line
- Result numbering uses muted style with right-aligned width
- Consistent 8-space indent for metadata, snippets, and explain lines
- Header line uses muted style for search mode instead of dim+parens
- Trailing blank line moved after the result loop instead of per-result

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/cli/commands/search.rs

@@ -309,20 +309,20 @@ fn parse_json_array(json: &str) -> Vec<String> {
         .collect()
 }
 
-/// Render FTS snippet with `<mark>` tags as terminal bold+underline.
+/// Render FTS snippet with `<mark>` tags as terminal highlight style.
 fn render_snippet(snippet: &str) -> String {
     let mut result = String::new();
     let mut remaining = snippet;
     while let Some(start) = remaining.find("<mark>") {
-        result.push_str(&remaining[..start]);
+        result.push_str(&Theme::muted().render(&remaining[..start]));
         remaining = &remaining[start + 6..];
         if let Some(end) = remaining.find("</mark>") {
             let highlighted = &remaining[..end];
-            result.push_str(&Theme::bold().underline().render(highlighted));
+            result.push_str(&Theme::highlight().render(highlighted));
             remaining = &remaining[end + 7..];
         }
     }
-    result.push_str(remaining);
+    result.push_str(&Theme::muted().render(remaining));
     result
 }
 
@@ -345,32 +345,34 @@ pub fn print_search_results(response: &SearchResponse) {
         "\n   {} results for '{}'  {}",
         Theme::bold().render(&response.total_results.to_string()),
         Theme::bold().render(&response.query),
-        Theme::dim().render(&format!("({})", response.mode))
+        Theme::muted().render(&response.mode)
     );
-    println!();
 
     for (i, result) in response.results.iter().enumerate() {
+        println!();
+
         let type_badge = match result.source_type.as_str() {
-            "issue" => Theme::info().render("issue"),
+            "issue" => Theme::issue_ref().render("issue"),
-            "merge_request" => Theme::accent().render("mr"),
+            "merge_request" => Theme::mr_ref().render("  mr "),
-            "discussion" => Theme::info().render("disc"),
+            "discussion" => Theme::info().render(" disc"),
-            "note" => Theme::info().render("note"),
+            "note" => Theme::muted().render(" note"),
-            _ => Theme::dim().render(&result.source_type),
+            _ => Theme::muted().render(&format!("{:>5}", &result.source_type)),
         };
 
         // Title line: rank, type badge, title
         println!(
-            "  {} {} {}",
+            "  {:>3}.  {}  {}",
-            Theme::dim().render(&format!("{:>2}.", i + 1)),
+            Theme::muted().render(&(i + 1).to_string()),
             type_badge,
             Theme::bold().render(&result.title)
         );
 
         // Metadata: project, author, labels — compact middle-dot line
+        let sep = Theme::muted().render(" \u{b7} ");
         let mut meta_parts: Vec<String> = Vec::new();
-        meta_parts.push(result.project_path.clone());
+        meta_parts.push(Theme::muted().render(&result.project_path));
         if let Some(ref author) = result.author {
-            meta_parts.push(format!("@{author}"));
+            meta_parts.push(Theme::username().render(&format!("@{author}")));
         }
         if !result.labels.is_empty() {
             let label_str = if result.labels.len() <= 3 {
@@ -382,16 +384,13 @@ pub fn print_search_results(response: &SearchResponse) {
                     result.labels.len() - 2
                 )
             };
-            meta_parts.push(label_str);
+            meta_parts.push(Theme::muted().render(&label_str));
         }
-        println!(
+        println!("        {}", meta_parts.join(&sep));
-            "      {}",
-            Theme::dim().render(&meta_parts.join(" \u{b7} "))
-        );
 
-        // Snippet with proper highlighting
+        // Snippet with highlight styling
         let rendered = render_snippet(&result.snippet);
-        println!("      {}", Theme::dim().render(&rendered));
+        println!("        {rendered}");
 
         if let Some(ref explain) = result.explain {
             println!(
@@ -408,9 +407,9 @@ pub fn print_search_results(response: &SearchResponse) {
                 explain.rrf_score
             );
         }
+    }
 
     println!();
-    }
 }
 
 #[derive(Serialize)]