Update helpdoc viewer UI and improve text handling

- Add title localization for helpdoc viewer
- Implement ANSI-aware string truncation for proper display
- Improve focus indication with color highlighting
- Move display_width utility to shared module
- Update welcome and command helpdoc formatting
- Bump copyright year to 2026

3 files changed, 21 insertions, 19 deletions

diff --git a/utils/src/display.rs b/utils/src/display.rs
index 5b452ce..c2ffeea 100644
--- a/utils/src/display.rs
+++ b/utils/src/display.rs
@@ -1,3 +1,4 @@
 pub mod markdown;
 pub mod pager;
+pub mod str_width;
 pub mod table;
diff --git a/utils/src/display/str_width.rs b/utils/src/display/str_width.rs
new file mode 100644
index 0000000..a725bdb
--- /dev/null
+++ b/utils/src/display/str_width.rs
@@ -0,0 +1,18 @@
+pub fn display_width(s: &str) -> usize {
+    // Filter out ANSI escape sequences before calculating width
+    let filtered_bytes = strip_ansi_escapes::strip(s);
+    let filtered_str = match std::str::from_utf8(&filtered_bytes) {
+        Ok(s) => s,
+        Err(_) => s, // Fallback to original string if UTF-8 conversion fails
+    };
+
+    let mut width = 0;
+    for c in filtered_str.chars() {
+        if c.is_ascii() {
+            width += 1;
+        } else {
+            width += 2;
+        }
+    }
+    width
+}
diff --git a/utils/src/display/table.rs b/utils/src/display/table.rs
index ae745d8..e6f1aca 100644
--- a/utils/src/display/table.rs
+++ b/utils/src/display/table.rs
@@ -1,3 +1,5 @@
+use crate::display::str_width::display_width;
+
 pub struct Table {
     items: Vec<String>,
     line: Vec<Vec<String>>,
@@ -122,22 +124,3 @@ impl std::fmt::Display for Table {
         Ok(())
     }
 }
-
-pub fn display_width(s: &str) -> usize {
-    // Filter out ANSI escape sequences before calculating width
-    let filtered_bytes = strip_ansi_escapes::strip(s);
-    let filtered_str = match std::str::from_utf8(&filtered_bytes) {
-        Ok(s) => s,
-        Err(_) => s, // Fallback to original string if UTF-8 conversion fails
-    };
-
-    let mut width = 0;
-    for c in filtered_str.chars() {
-        if c.is_ascii() {
-            width += 1;
-        } else {
-            width += 2;
-        }
-    }
-    width
-}