feat: mock-fidelity pass — read-only details view, widget-based UI

Restructure the details surface and move rendering onto ratatui widgets
per design-mock feedback:

- Details is now a read-only issue view (side panel on wide terminals,
  modal on narrow): title with status dot, state chip, colored label
  pills, due date, linked source, rendered markdown description with
  acceptance-criteria checkboxes, and Edit / Move / Close actions.
  Editing moved to a dedicated EditIssue overlay ('e' or Enter).
- 'm' moves the selected issue one column right (GitLab transition when
  connected, local move offline)
- Rounded borders everywhere (ratatui border::ROUNDED); Tabs widget for
  Settings sections and story Edit/Preview/Generated tabs; settings text
  fields render as bordered input Blocks with focus/error borders and
  inline validation in the title; toggles as ☑/☐ rows
- Buttons render as half-block pills instead of colored text
- Board cards: colored status dot, per-label deterministic pill colors,
  uppercase label subtitle, "+N more issues" column footer, "+" new-issue
  affordance in column headers
- Topbar: "● Connected • project @user", "⟳ Synced Nm ago" after sync,
  Help and Settings buttons; "● Ready" idle indicator in the status bar
- Generate Stories: Select All button + Ctrl+A toggle-all
- Help overlay: two-column shortcut layout
- Mouse capture releases automatically inside overlays so terminal-native
  text selection/copy works in text areas; board keeps drag & drop

278 tests pass; fmt clean; clippy unchanged (pre-existing warnings only).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EJsFyUeN5xJiw9hQzjx3Gj

Author: aksOps

src/jobs.rs

@@ -882,7 +882,7 @@ pub fn apply_job_result(app: &mut crate::App, result: JobResult) {
             app.upsert_issue_record(&issue);
             if app.editor_submit_in_flight {
                 app.editor_submit_in_flight = false;
-                if app.overlay == Some(crate::Overlay::Details) {
+                if app.overlay == Some(crate::Overlay::EditIssue) {
                     app.close_overlay();
                 }
             }
@@ -999,6 +999,7 @@ pub fn apply_job_result(app: &mut crate::App, result: JobResult) {
             let skipped = sync.skipped.len();
             app.open_assigned_set = sync.open_assigned_set;
             app.has_synced = true;
+            app.last_synced = Some(std::time::Instant::now());
             app.replace_issue_records(&sync.issues);
             app.set_status(
                 crate::StatusKind::Success,
@@ -2577,7 +2578,7 @@ mod tests {
     #[test]
     fn issue_updated_success_closes_pending_details_modal() {
         let mut app = crate::App::demo();
-        app.open_details();
+        app.open_edit_issue();
         app.editor_submit_in_flight = true;
 
         apply_job_result(
@@ -2596,20 +2597,20 @@ mod tests {
             JobResult::IssueUpdated(Err("update failed".into())),
         ] {
             let mut app = crate::App::demo();
-            app.open_details();
+            app.open_edit_issue();
             app.editor_submit_in_flight = true;
 
             apply_job_result(&mut app, result);
 
-            assert_eq!(app.overlay, Some(crate::Overlay::Details));
+            assert_eq!(app.overlay, Some(crate::Overlay::EditIssue));
             assert!(!app.editor_submit_in_flight);
         }
     }
 
     #[test]
     fn ai_editor_stale_result_does_not_overwrite_after_cancel() {
         let mut app = crate::App::demo();
-        app.open_details();
+        app.open_edit_issue();
         app.editor_description = "keep me".into();
         app.request_improve_description();
         let generation_id = app.ai_generation_id;