Initial commit: Azure DevOps TUI client

A terminal-based user interface for browsing and managing Azure DevOps
work items. Features include:

- Browse work items with filtering by area, iteration, state, and type
- View work item details with markdown rendering
- Open work items in browser
- Create git branches from work items
- Update work item state
- Keyboard-driven navigation

🤖 Generated with [Claude Code](https://claude.ai/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

internal/api/iterations.go

@@ -0,0 +1,83 @@
+package api
+
+import (
+	"time"
+
+	"github.com/samuelenocsson/devops-tui/internal/models"
+)
+
+// iterationsResponse represents the API response for iterations
+type iterationsResponse struct {
+	Count int                 `json:"count"`
+	Value []iterationAPIItem `json:"value"`
+}
+
+type iterationAPIItem struct {
+	ID         string             `json:"id"`
+	Name       string             `json:"name"`
+	Path       string             `json:"path"`
+	Attributes iterationAttrs     `json:"attributes"`
+	URL        string             `json:"url"`
+}
+
+type iterationAttrs struct {
+	StartDate  *time.Time `json:"startDate"`
+	FinishDate *time.Time `json:"finishDate"`
+	TimeFrame  string     `json:"timeFrame"`
+}
+
+// GetIterations fetches all iterations (sprints) for the team
+func (c *Client) GetIterations() ([]models.Iteration, error) {
+	resp, err := c.getTeam("/work/teamsettings/iterations")
+	if err != nil {
+		return nil, err
+	}
+
+	var apiResp iterationsResponse
+	if err := decode(resp, &apiResp); err != nil {
+		return nil, err
+	}
+
+	iterations := make([]models.Iteration, 0, apiResp.Count)
+	for _, item := range apiResp.Value {
+		iter := models.Iteration{
+			ID:        item.ID,
+			Name:      item.Name,
+			Path:      item.Path,
+			TimeFrame: item.Attributes.TimeFrame,
+			URL:       item.URL,
+		}
+
+		if item.Attributes.StartDate != nil {
+			iter.StartDate = *item.Attributes.StartDate
+		}
+		if item.Attributes.FinishDate != nil {
+			iter.FinishDate = *item.Attributes.FinishDate
+		}
+
+		iterations = append(iterations, iter)
+	}
+
+	return iterations, nil
+}
+
+// GetCurrentIteration returns the current iteration
+func (c *Client) GetCurrentIteration() (*models.Iteration, error) {
+	iterations, err := c.GetIterations()
+	if err != nil {
+		return nil, err
+	}
+
+	for _, iter := range iterations {
+		if iter.IsCurrent() {
+			return &iter, nil
+		}
+	}
+
+	// Return the first one if no current found
+	if len(iterations) > 0 {
+		return &iterations[0], nil
+	}
+
+	return nil, nil
+}