Task dependencies UI in TaskModal + API

- Dependencies section shows links with colored labels
- Add dependency form (type + task ID)
- Delete link button
- API: getTaskLinks, createTaskLink, deleteTaskLink

src/components/TaskModal.tsx

@@ -1,10 +1,11 @@
 
 import { useEffect, useState } from "react";
-import type { Task, Member, Step, Message } from "@/lib/api";
+import type { Task, Member, Step, Message, TaskLink } from "@/lib/api";
 import {
   updateTask, deleteTask, getMembers,
   getSteps, createStep, updateStep, deleteStep as _deleteStepApi,
   getMessages, sendMessage,
+  getTaskLinks, createTaskLink, deleteTaskLink,
 } from "@/lib/api";
 
 const STATUSES = [
@@ -45,6 +46,10 @@ export default function TaskModal({ task, projectId: _projectId, projectSlug: _p
   const [assigneeId, setAssigneeId] = useState(task.assignee_id || "");
   const [members, setMembers] = useState<Member[]>([]);
   const [steps, setSteps] = useState<Step[]>(task.steps || []);
+  const [links, setLinks] = useState<TaskLink[]>([]);
+  const [showAddLink, setShowAddLink] = useState(false);
+  const [linkTargetId, setLinkTargetId] = useState("");
+  const [linkType, setLinkType] = useState("depends_on");
   const [comments, setComments] = useState<Message[]>([]);
   const [_saving, setSaving] = useState(false);
   const [editingDesc, setEditingDesc] = useState(false);
@@ -56,6 +61,7 @@ export default function TaskModal({ task, projectId: _projectId, projectSlug: _p
   useEffect(() => {
     getMembers().then(setMembers).catch(() => {});
     getSteps(task.id).then(setSteps).catch(() => {});
+    getTaskLinks(task.id).then(setLinks).catch(() => {});
     getMessages({ task_id: task.id }).then(setComments).catch(() => {});
   }, [task.id]);
 
@@ -233,6 +239,68 @@ export default function TaskModal({ task, projectId: _projectId, projectSlug: _p
               </div>
             </div>
 
+            {/* Dependencies */}
+            {(links.length > 0 || showAddLink) && (
+            <div>
+              <div className="text-sm text-[var(--muted)] mb-2">Зависимости</div>
+              <div className="space-y-1 mb-2">
+                {links.map((link) => {
+                  const label = link.link_type === "blocks" ? "🔴 Блокирует" :
+                    link.link_type === "blocked_by" ? "🟡 Заблокировано" :
+                    link.link_type === "depends_on" ? "🟡 Зависит от" :
+                    link.link_type === "required_by" ? "🔵 Требуется для" :
+                    "🔗 Связано с";
+                  const title = link.target_title || link.source_title || "...";
+                  return (
+                    <div key={link.id} className="flex items-center justify-between text-xs p-1.5 bg-[var(--bg)] border border-[var(--border)] rounded">
+                      <span>{label}: <span className="font-medium">{title}</span></span>
+                      <button
+                        onClick={async () => {
+                          await deleteTaskLink(task.id, link.id);
+                          setLinks(links.filter(l => l.id !== link.id));
+                        }}
+                        className="text-red-400 hover:text-red-300 ml-2"
+                      >×</button>
+                    </div>
+                  );
+                })}
+              </div>
+              {showAddLink && (
+                <div className="flex gap-1 mb-2">
+                  <select value={linkType} onChange={e => setLinkType(e.target.value)}
+                    className="px-2 py-1 bg-[var(--bg)] border border-[var(--border)] rounded text-xs">
+                    <option value="depends_on">Зависит от</option>
+                    <option value="blocks">Блокирует</option>
+                    <option value="relates_to">Связано с</option>
+                  </select>
+                  <input
+                    value={linkTargetId}
+                    onChange={e => setLinkTargetId(e.target.value)}
+                    placeholder="ID задачи..."
+                    className="flex-1 px-2 py-1 bg-[var(--bg)] border border-[var(--border)] rounded text-xs outline-none"
+                  />
+                  <button
+                    onClick={async () => {
+                      if (!linkTargetId) return;
+                      const link = await createTaskLink(task.id, linkTargetId, linkType);
+                      setLinks([...links, link]);
+                      setLinkTargetId("");
+                      setShowAddLink(false);
+                    }}
+                    className="px-2 py-1 bg-[var(--accent)] text-white rounded text-xs"
+                  >+</button>
+                </div>
+              )}
+            </div>
+            )}
+
+            <button
+              onClick={() => setShowAddLink(!showAddLink)}
+              className="text-xs text-[var(--accent)] hover:underline mb-2"
+            >
+              {showAddLink ? "Скрыть" : "+ Добавить зависимость"}
+            </button>
+
             {/* Comments */}
             <div>
               <div className="text-sm text-[var(--muted)] mb-2">Комментарии</div>

src/lib/api.ts

@@ -427,3 +427,24 @@ export async function addProjectMember(projectId: string, memberId: string): Pro
 export async function removeProjectMember(projectId: string, memberId: string): Promise<{ ok: boolean }> {
   return request(`/api/v1/projects/${projectId}/members/${memberId}`, { method: "DELETE" });
 }
+// --- Task Links ---
+export interface TaskLink {
+  id: string;
+  source_id: string;
+  target_id: string;
+  link_type: string;
+  target_title?: string;
+  source_title?: string;
+}
+
+export async function getTaskLinks(taskId: string): Promise<TaskLink[]> {
+  return request(`/tasks/${taskId}/links`);
+}
+
+export async function createTaskLink(taskId: string, targetId: string, linkType: string): Promise<TaskLink> {
+  return request(`/tasks/${taskId}/links`, { method: "POST", body: JSON.stringify({ target_id: targetId, link_type: linkType }) });
+}
+
+export async function deleteTaskLink(taskId: string, linkId: string): Promise<void> {
+  return request(`/tasks/${taskId}/links/${linkId}`, { method: "DELETE" });
+}