Add bucket CRUD and read-only Projects/Labels to Settings page

New "Maintenance Buckets" section: create a bucket, add a pool item by
title (creates the task and assigns it in one step), remove an item,
delete a bucket (unbuckets its tasks rather than deleting them).

New read-only Projects and Labels sections (name + color swatch) --
both are simple enough that read-only is the right call on web, per
user direction, rather than duplicating the Android popup's editing
UX.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EZ7ikw2ukGJFTHE3bJS7zL

1 files changed, 131 insertions, 0 deletions

diff --git a/internal/handlers/buckets_web.go b/internal/handlers/buckets_web.go
new file mode 100644
index 0000000..094e8dd
--- /dev/null
+++ b/internal/handlers/buckets_web.go
@@ -0,0 +1,131 @@
+package handlers
+
+import (
+	"errors"
+	"net/http"
+	"strconv"
+	"strings"
+
+	"github.com/go-chi/chi/v5"
+
+	"task-dashboard/internal/models"
+	"task-dashboard/internal/store"
+)
+
+// BuildBucketSummaries returns every maintenance bucket with its full pool
+// (dormant and active items both). Backs the Settings page's bucket
+// management section.
+func BuildBucketSummaries(s *store.Store) ([]models.BucketSummary, error) {
+	buckets, err := s.GetBuckets()
+	if err != nil {
+		return nil, err
+	}
+	summaries := make([]models.BucketSummary, 0, len(buckets))
+	for _, bucket := range buckets {
+		items, err := s.GetBucketItems(bucket.ID)
+		if err != nil {
+			return nil, err
+		}
+		summaries = append(summaries, models.BucketSummary{Bucket: bucket, Items: items})
+	}
+	return summaries, nil
+}
+
+// HandleBucketsCreate creates a new maintenance bucket from the Settings page's form.
+func (h *Handler) HandleBucketsCreate(w http.ResponseWriter, r *http.Request) {
+	if err := r.ParseForm(); err != nil {
+		JSONError(w, http.StatusBadRequest, "Failed to parse form", err)
+		return
+	}
+	name := strings.TrimSpace(r.FormValue("name"))
+	cycleDays, err1 := strconv.Atoi(r.FormValue("cycle_days"))
+	pickN, err2 := strconv.Atoi(r.FormValue("pick_n"))
+	if name == "" || err1 != nil || err2 != nil || cycleDays <= 0 || pickN <= 0 {
+		JSONError(w, http.StatusBadRequest, "Name, a positive cycle_days, and a positive pick_n are required", nil)
+		return
+	}
+	if _, err := h.store.CreateBucket(name, cycleDays, pickN); err != nil {
+		JSONError(w, http.StatusInternalServerError, "Failed to create bucket", err)
+		return
+	}
+	h.renderBucketsSection(w, r)
+}
+
+// HandleBucketItemAdd creates a new native task from the form's title and
+// assigns it to the bucket's pool in one step -- the Settings page's
+// "type a title to add to the pool" flow. To add a task that already
+// exists elsewhere, use the /api/widget/buckets/{id}/items endpoint with
+// its id directly (unchanged, still task_id-based).
+func (h *Handler) HandleBucketItemAdd(w http.ResponseWriter, r *http.Request) {
+	bucketID := chi.URLParam(r, "id")
+	if err := r.ParseForm(); err != nil {
+		JSONError(w, http.StatusBadRequest, "Failed to parse form", err)
+		return
+	}
+	title := strings.TrimSpace(r.FormValue("title"))
+	if title == "" {
+		JSONError(w, http.StatusBadRequest, "title is required", nil)
+		return
+	}
+	task := models.Task{ID: newID(), Content: title, Priority: 1}
+	if err := h.store.CreateNativeTask(task); err != nil {
+		JSONError(w, http.StatusInternalServerError, "Failed to create task", err)
+		return
+	}
+	if err := h.store.AddBucketItem(bucketID, task.ID); err != nil {
+		JSONError(w, http.StatusInternalServerError, "Failed to add task to bucket", err)
+		return
+	}
+	h.renderBucketsSection(w, r)
+}
+
+// HandleBucketItemRemove clears a task's bucket membership from the
+// Settings page (the task itself is left in place, just unbucketed).
+func (h *Handler) HandleBucketItemRemove(w http.ResponseWriter, r *http.Request) {
+	if err := r.ParseForm(); err != nil {
+		JSONError(w, http.StatusBadRequest, "Failed to parse form", err)
+		return
+	}
+	taskID := r.FormValue("task_id")
+	if err := h.store.RemoveBucketItem(taskID); err != nil {
+		if errors.Is(err, store.ErrNativeTaskNotFound) {
+			JSONError(w, http.StatusNotFound, "task not found", err)
+			return
+		}
+		JSONError(w, http.StatusInternalServerError, "Failed to remove bucket item", err)
+		return
+	}
+	h.renderBucketsSection(w, r)
+}
+
+// HandleBucketDelete removes a bucket, returning its member tasks to being
+// plain unbucketed tasks.
+func (h *Handler) HandleBucketDelete(w http.ResponseWriter, r *http.Request) {
+	id := chi.URLParam(r, "id")
+	if err := h.store.DeleteBucket(id); err != nil {
+		if errors.Is(err, store.ErrNativeTaskNotFound) {
+			JSONError(w, http.StatusNotFound, "bucket not found", err)
+			return
+		}
+		JSONError(w, http.StatusInternalServerError, "Failed to delete bucket", err)
+		return
+	}
+	h.renderBucketsSection(w, r)
+}
+
+// renderBucketsSection re-renders the "buckets-section" partial after any
+// bucket mutation, so the Settings page's htmx targets can swap in the
+// fresh pool contents without a full page reload.
+func (h *Handler) renderBucketsSection(w http.ResponseWriter, r *http.Request) {
+	summaries, err := BuildBucketSummaries(h.store)
+	if err != nil {
+		JSONError(w, http.StatusInternalServerError, "Failed to load buckets", err)
+		return
+	}
+	data := struct {
+		Buckets []models.BucketSummary
+	}{Buckets: summaries}
+	if err := h.renderer.Render(w, "buckets-section", data); err != nil {
+		JSONError(w, http.StatusInternalServerError, "Failed to render buckets", err)
+	}
+}