feat(tui): responsive breakpoints for detail views (bd-a6yb)

Apply breakpoint-aware layout to issue_detail and mr_detail views:
- Issue detail: hide labels on Xs, hide assignees on Xs/Sm, skip milestone row on Xs
- MR detail: hide branch names and merge status on Xs/Sm
- Issue detail allocate_sections gives description 60% on wide (Lg+) vs 40% narrow
- Add responsive tests for both detail views
- Close bd-a6yb: all TUI screens now adapt to terminal width

760 lib tests pass, clippy clean.

crates/lore-tui/src/view/search.rs

@@ -20,6 +20,7 @@ use ftui::render::cell::Cell;
 use ftui::render::drawing::Draw;
 use ftui::render::frame::Frame;
 
+use crate::layout::{classify_width, search_show_project};
 use crate::message::EntityKind;
 use crate::state::search::SearchState;
 use crate::text_width::cursor_cell_offset;
@@ -39,6 +40,8 @@ pub fn render_search(frame: &mut Frame<'_>, state: &SearchState, area: Rect) {
         return;
     }
 
+    let bp = classify_width(area.width);
+    let show_project = search_show_project(bp);
     let mut y = area.y;
     let max_x = area.right();
 
@@ -99,7 +102,7 @@ pub fn render_search(frame: &mut Frame<'_>, state: &SearchState, area: Rect) {
     if state.results.is_empty() {
         render_empty_state(frame, state, area.x + 1, y, max_x);
     } else {
-        render_result_list(frame, state, area.x, y, area.width, list_height);
+        render_result_list(frame, state, area.x, y, area.width, list_height, show_project);
     }
 
     // -- Bottom hint bar -----------------------------------------------------
@@ -228,6 +231,7 @@ fn render_result_list(
     start_y: u16,
     width: u16,
     list_height: usize,
+    show_project: bool,
 ) {
     let max_x = x + width;
 
@@ -294,11 +298,13 @@ fn render_result_list(
         let after_title =
             frame.print_text_clipped(after_iid + 1, y, &result.title, label_style, max_x);
 
-        // Project path (right-aligned).
-        let path_width = result.project_path.len() as u16 + 2;
-        let path_x = max_x.saturating_sub(path_width);
-        if path_x > after_title + 1 {
-            frame.print_text_clipped(path_x, y, &result.project_path, detail_style, max_x);
+        // Project path (right-aligned, hidden on narrow terminals).
+        if show_project {
+            let path_width = result.project_path.len() as u16 + 2;
+            let path_x = max_x.saturating_sub(path_width);
+            if path_x > after_title + 1 {
+                frame.print_text_clipped(path_x, y, &result.project_path, detail_style, max_x);
+            }
         }
     }
 
@@ -476,4 +482,23 @@ mod tests {
             render_search(&mut frame, &state, Rect::new(0, 0, 80, 10));
         });
     }
+
+    #[test]
+    fn test_render_search_responsive_breakpoints() {
+        // Narrow (Xs=50): project path hidden.
+        with_frame!(50, 24, |frame| {
+            let mut state = SearchState::default();
+            state.enter(fts_caps());
+            state.results = sample_results(3);
+            render_search(&mut frame, &state, Rect::new(0, 0, 50, 24));
+        });
+
+        // Standard (Md=100): project path shown.
+        with_frame!(100, 24, |frame| {
+            let mut state = SearchState::default();
+            state.enter(fts_caps());
+            state.results = sample_results(3);
+            render_search(&mut frame, &state, Rect::new(0, 0, 100, 24));
+        });
+    }
 }