feat: add gRPC client with config-based server address and album support

- Add tonic/prost gRPC client connecting to music-agregator service
- Add config.yaml for configurable server host/port
- Add build.rs for proto compilation from music-agregator
- Update Artist/Album models to match proto with MonitorState enum
- Convert album list from GetArtists response
- Fix album click selection with correct layout offsets
- Improve monitor state icons for better visibility

src/ui/library.rs

@@ -8,7 +8,7 @@ use ratatui::{
     widgets::{List, ListItem, ListState, Paragraph},
 };
 
-use crate::data::{Album, AlbumStatus, Artist, Track};
+use crate::data::{Album, AlbumStatus, Artist, MonitorState, Track};
 use crate::theme;
 use crate::ui::pane::{Pane, section_divider};
 use crate::ui::progress_bar::progress_bar;
@@ -201,6 +201,20 @@ fn status_icon(status: AlbumStatus, monitored: bool) -> (char, Style) {
     }
 }
 
+fn monitor_state_icon(state: MonitorState, status: AlbumStatus) -> (char, Style) {
+    match state {
+        MonitorState::Monitored => match status {
+            AlbumStatus::Complete => ('✓', Style::default().fg(theme::GREEN)),
+            AlbumStatus::Partial => ('◐', Style::default().fg(theme::YELLOW)),
+            AlbumStatus::Wanted => ('!', Style::default().fg(theme::RED)),
+            AlbumStatus::Unmonitored => ('-', Style::default().fg(theme::GRAY)),
+        },
+        MonitorState::Unmonitored => ('-', Style::default().fg(theme::GRAY)),
+        MonitorState::Excluded => ('x', Style::default().fg(theme::RED)),
+        MonitorState::Unspecified => ('?', Style::default().fg(theme::GRAY)),
+    }
+}
+
 fn track_icon(have: bool) -> (char, Style) {
     if have {
         ('✓', Style::default().fg(theme::GREEN))
@@ -267,15 +281,12 @@ fn render_artists_pane(frame: &mut Frame, area: Rect, state: &mut LibraryState)
         .iter()
         .map(|artist| {
             let status = artist_status(artist);
-            let (icon_char, icon_style) = status_icon(status, artist.monitored);
+            let (icon_char, icon_style) = monitor_state_icon(artist.monitor_state, status);
 
             let total: u16 = artist.albums.iter().map(|a| a.total).sum();
             let have: u16 = artist.albums.iter().map(|a| a.have).sum();
 
             let mut name_text = artist.name.clone();
-            if !artist.monitored {
-                name_text.push_str(" ·unm");
-            }
 
             let count_str = format!("{}/{}", have, total);
             let name_width = inner.width as usize - 2 - count_str.len() - 2;
@@ -399,18 +410,27 @@ fn render_artist_header(frame: &mut Frame, area: Rect, artist: &Artist) {
     let have: u16 = artist.albums.iter().map(|a| a.have).sum();
     let total: u16 = artist.albums.iter().map(|a| a.total).sum();
 
-    let (status_icon, status_text, status_style) = if artist.monitored {
-        (
+    let (status_icon, status_text, status_style) = match artist.monitor_state {
+        MonitorState::Monitored => (
             Span::styled("● ", Style::default().fg(theme::GREEN)),
             "Monitored",
             Style::default().fg(theme::FG2),
-        )
-    } else {
-        (
+        ),
+        MonitorState::Unmonitored => (
             Span::styled("◌ ", Style::default().fg(theme::GRAY)),
             "Unmonitored",
             Style::default().fg(theme::GRAY),
-        )
+        ),
+        MonitorState::Excluded => (
+            Span::styled("⊘ ", Style::default().fg(theme::RED)),
+            "Excluded",
+            Style::default().fg(theme::RED),
+        ),
+        MonitorState::Unspecified => (
+            Span::styled("? ", Style::default().fg(theme::GRAY)),
+            "Unknown",
+            Style::default().fg(theme::GRAY),
+        ),
     };
 
     let lines = vec![