Labels UI + task labels on kanban + API functions

- Labels management in ProjectSettings (CRUD, color picker)
- Task labels displayed as colored pills on kanban cards
- API: getLabels, createLabel, deleteLabel, addTaskLabel, removeTaskLabel
- Task links API functions

src/components/KanbanBoard.tsx

@@ -111,6 +111,15 @@ export default function KanbanBoard({ projectId, projectSlug }: Props) {
         )}
       </div>
       <div className="text-sm ml-3.5">{task.title}</div>
+      {task.labels && task.labels.length > 0 && (
+        <div className="flex flex-wrap gap-1 ml-3.5 mt-1">
+          {task.labels.map((label: string) => (
+            <span key={label} className="text-[10px] px-1.5 py-0.5 rounded-full bg-[var(--accent)]/20 text-[var(--accent)]">
+              {label}
+            </span>
+          ))}
+        </div>
+      )}
       {showMoveButtons && colIndex !== undefined && (
         <div className="flex gap-1 mt-2 ml-3.5">
           {colIndex > 0 && (

src/components/ProjectSettings.tsx

@@ -1,13 +1,16 @@
 import { useState, useEffect } from "react";
 import { useNavigate } from "react-router-dom";
-import type { Project, ProjectMember, Member } from "@/lib/api";
+import type { Project, ProjectMember, Member, Label } from "@/lib/api";
 import { 
   updateProject, 
   deleteProject, 
   getProjectMembers, 
   addProjectMember, 
   removeProjectMember, 
-  getMembers 
+  getMembers,
+  getLabels,
+  createLabel,
+  deleteLabel,
 } from "@/lib/api";
 
 interface Props {
@@ -31,6 +34,11 @@ export default function ProjectSettings({ project, onUpdated }: Props) {
   const [loadingMembers, setLoadingMembers] = useState(true);
   const [selectedMember, setSelectedMember] = useState("");
 
+  // Labels state
+  const [labels, setLabels] = useState<Label[]>([]);
+  const [newLabelName, setNewLabelName] = useState("");
+  const [newLabelColor, setNewLabelColor] = useState("#6366f1");
+
   // Load project members and all members
   useEffect(() => {
     const loadMembers = async () => {
@@ -41,6 +49,8 @@ export default function ProjectSettings({ project, onUpdated }: Props) {
         ]);
         setMembers(projectMembers);
         setAllMembers(allMembersList);
+        const projectLabels = await getLabels(project.id);
+        setLabels(projectLabels);
       } catch (e) {
         console.error("Failed to load members:", e);
       } finally {
@@ -165,6 +175,51 @@ export default function ProjectSettings({ project, onUpdated }: Props) {
         {saved && <span className="text-sm text-green-400">Сохранено ✓</span>}
       </div>
 
+      {/* Labels Section */}
+      <div className="pt-6 border-t border-[var(--border)]">
+        <div className="text-sm font-medium mb-3">Лейблы</div>
+        <div className="space-y-2 mb-3">
+          {labels.map((label) => (
+            <div key={label.id} className="flex items-center justify-between p-2 bg-[var(--bg)] border border-[var(--border)] rounded-lg">
+              <div className="flex items-center gap-2">
+                <span className="w-3 h-3 rounded-full" style={{ backgroundColor: label.color }} />
+                <span className="text-sm">{label.name}</span>
+              </div>
+              <button
+                onClick={async () => {
+                  await deleteLabel(label.id);
+                  setLabels(labels.filter(l => l.id !== label.id));
+                }}
+                className="text-xs text-red-400 hover:text-red-300"
+              >×</button>
+            </div>
+          ))}
+        </div>
+        <div className="flex gap-2">
+          <input
+            value={newLabelName}
+            onChange={e => setNewLabelName(e.target.value)}
+            placeholder="Новый лейбл..."
+            className="flex-1 px-3 py-1.5 bg-[var(--bg)] border border-[var(--border)] rounded-lg text-sm outline-none"
+          />
+          <input
+            type="color"
+            value={newLabelColor}
+            onChange={e => setNewLabelColor(e.target.value)}
+            className="w-8 h-8 rounded cursor-pointer"
+          />
+          <button
+            onClick={async () => {
+              if (!newLabelName.trim()) return;
+              const label = await createLabel(project.id, newLabelName.trim(), newLabelColor);
+              setLabels([...labels, label]);
+              setNewLabelName("");
+            }}
+            className="px-3 py-1.5 bg-[var(--accent)] text-white rounded-lg text-sm"
+          >+</button>
+        </div>
+      </div>
+
       {/* Members Section */}
       <div className="pt-6 border-t border-[var(--border)]">
         <div className="text-sm font-medium mb-3">Участники</div>

src/lib/api.ts

@@ -448,3 +448,31 @@ export async function createTaskLink(taskId: string, targetId: string, linkType:
 export async function deleteTaskLink(taskId: string, linkId: string): Promise<void> {
   return request(`/tasks/${taskId}/links/${linkId}`, { method: "DELETE" });
 }
+
+// --- Labels ---
+export interface Label {
+  id: string;
+  project_id: string;
+  name: string;
+  color: string;
+}
+
+export async function getLabels(projectId: string): Promise<Label[]> {
+  return request(`/projects/${projectId}/labels`);
+}
+
+export async function createLabel(projectId: string, name: string, color: string = "#6366f1"): Promise<Label> {
+  return request(`/projects/${projectId}/labels`, { method: "POST", body: JSON.stringify({ name, color }) });
+}
+
+export async function deleteLabel(labelId: string): Promise<void> {
+  return request(`/labels/${labelId}`, { method: "DELETE" });
+}
+
+export async function addTaskLabel(taskId: string, labelId: string): Promise<void> {
+  return request(`/tasks/${taskId}/labels/${labelId}`, { method: "POST" });
+}
+
+export async function removeTaskLabel(taskId: string, labelId: string): Promise<void> {
+  return request(`/tasks/${taskId}/labels/${labelId}`, { method: "DELETE" });
+}