fix: add nil check for autocomplete in issueview.UpdateProgramContext

When issueview.Model is not properly initialized (e.g., in tests that create
partial models), the ac pointer is nil. This caused a panic when
syncProgramContext called UpdateProgramContext on all components.

Author: sideshowbarker

internal/tui/components/issueview/issueview.go

@@ -554,5 +554,7 @@ func (m *Model) issueAssignees() []string {
 func (m *Model) UpdateProgramContext(ctx *context.ProgramContext) {
 	m.ctx = ctx
 	m.inputBox.UpdateProgramContext(ctx)
-	m.ac.UpdateProgramContext(ctx)
+	if m.ac != nil {
+		m.ac.UpdateProgramContext(ctx)
+	}
 }

internal/tui/components/tasks/issue_test.go

@@ -22,11 +22,11 @@ type mockIssue struct {
 	updatedAt time.Time
 }
 
-func (m mockIssue) GetNumber() int                { return m.number }
-func (m mockIssue) GetRepoNameWithOwner() string  { return m.repoName }
-func (m mockIssue) GetTitle() string              { return m.title }
-func (m mockIssue) GetUrl() string                { return m.url }
-func (m mockIssue) GetUpdatedAt() time.Time       { return m.updatedAt }
+func (m mockIssue) GetNumber() int               { return m.number }
+func (m mockIssue) GetRepoNameWithOwner() string { return m.repoName }
+func (m mockIssue) GetTitle() string             { return m.title }
+func (m mockIssue) GetUrl() string               { return m.url }
+func (m mockIssue) GetUpdatedAt() time.Time      { return m.updatedAt }
 
 // noopStartTask is a stub that returns nil for testing
 func noopStartTask(task context.Task) tea.Cmd {

internal/tui/ui.go

@@ -1633,4 +1633,3 @@ func (m *Model) executeNotificationAction(action string) tea.Cmd {
 
 	return nil
 }
-