feat(web): add project detail page (/projects/[id])

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

apps/web/src/app/(authenticated)/projects/[id]/page.tsx

@@ -0,0 +1,491 @@
+"use client";
+
+import { useState, useEffect, useCallback } from "react";
+import type { ReactElement } from "react";
+import { useParams, useRouter } from "next/navigation";
+import { ArrowLeft } from "lucide-react";
+
+import { MosaicSpinner } from "@/components/ui/MosaicSpinner";
+import { fetchProject, type ProjectDetail } from "@/lib/api/projects";
+import { useWorkspaceId } from "@/lib/hooks";
+
+interface BadgeStyle {
+  label: string;
+  bg: string;
+  color: string;
+}
+
+interface StatusBadgeProps {
+  style: BadgeStyle;
+}
+
+interface MetaItemProps {
+  label: string;
+  value: string;
+}
+
+function getProjectStatusStyle(status: string): BadgeStyle {
+  switch (status) {
+    case "PLANNING":
+      return { label: "Planning", bg: "rgba(47,128,255,0.15)", color: "var(--primary)" };
+    case "ACTIVE":
+      return { label: "Active", bg: "rgba(20,184,166,0.15)", color: "var(--success)" };
+    case "PAUSED":
+      return { label: "Paused", bg: "rgba(245,158,11,0.15)", color: "var(--warn)" };
+    case "COMPLETED":
+      return { label: "Completed", bg: "rgba(139,92,246,0.15)", color: "var(--purple)" };
+    case "ARCHIVED":
+      return { label: "Archived", bg: "rgba(143,157,183,0.15)", color: "var(--muted)" };
+    default:
+      return { label: status, bg: "rgba(143,157,183,0.15)", color: "var(--muted)" };
+  }
+}
+
+function getPriorityStyle(priority: string | null | undefined): BadgeStyle {
+  switch (priority) {
+    case "HIGH":
+      return { label: "High", bg: "rgba(229,72,77,0.15)", color: "var(--danger)" };
+    case "MEDIUM":
+      return { label: "Medium", bg: "rgba(245,158,11,0.15)", color: "var(--warn)" };
+    case "LOW":
+      return { label: "Low", bg: "rgba(143,157,183,0.15)", color: "var(--muted)" };
+    default:
+      return { label: "Unspecified", bg: "rgba(143,157,183,0.15)", color: "var(--muted)" };
+  }
+}
+
+function getTaskStatusStyle(status: string): BadgeStyle {
+  switch (status) {
+    case "NOT_STARTED":
+      return { label: "Not Started", bg: "rgba(47,128,255,0.15)", color: "var(--primary)" };
+    case "IN_PROGRESS":
+      return { label: "In Progress", bg: "rgba(245,158,11,0.15)", color: "var(--warn)" };
+    case "PAUSED":
+      return { label: "Paused", bg: "rgba(143,157,183,0.15)", color: "var(--muted)" };
+    case "COMPLETED":
+      return { label: "Completed", bg: "rgba(20,184,166,0.15)", color: "var(--success)" };
+    case "ARCHIVED":
+      return { label: "Archived", bg: "rgba(143,157,183,0.15)", color: "var(--muted)" };
+    default:
+      return { label: status, bg: "rgba(143,157,183,0.15)", color: "var(--muted)" };
+  }
+}
+
+function formatDate(iso: string | null | undefined): string {
+  if (!iso) return "Not set";
+
+  try {
+    return new Date(iso).toLocaleDateString("en-US", {
+      month: "short",
+      day: "numeric",
+      year: "numeric",
+    });
+  } catch {
+    return iso;
+  }
+}
+
+function formatDateTime(iso: string | null | undefined): string {
+  if (!iso) return "Not set";
+
+  try {
+    return new Date(iso).toLocaleString("en-US", {
+      month: "short",
+      day: "numeric",
+      year: "numeric",
+      hour: "numeric",
+      minute: "2-digit",
+    });
+  } catch {
+    return iso;
+  }
+}
+
+function toFriendlyErrorMessage(error: unknown): string {
+  const fallback = "We had trouble loading this project. Please try again when you're ready.";
+
+  if (!(error instanceof Error)) {
+    return fallback;
+  }
+
+  const message = error.message.trim();
+  if (message.toLowerCase().includes("not found")) {
+    return "Project not found. It may have been deleted or you may not have access to it.";
+  }
+
+  return message || fallback;
+}
+
+function StatusBadge({ style: statusStyle }: StatusBadgeProps): ReactElement {
+  return (
+    <span
+      style={{
+        display: "inline-flex",
+        alignItems: "center",
+        padding: "2px 10px",
+        borderRadius: "var(--r)",
+        background: statusStyle.bg,
+        color: statusStyle.color,
+        fontSize: "0.75rem",
+        fontWeight: 500,
+      }}
+    >
+      {statusStyle.label}
+    </span>
+  );
+}
+
+function MetaItem({ label, value }: MetaItemProps): ReactElement {
+  return (
+    <div
+      style={{
+        background: "var(--bg)",
+        border: "1px solid var(--border)",
+        borderRadius: "var(--r)",
+        padding: "10px 12px",
+      }}
+    >
+      <p style={{ margin: "0 0 4px", fontSize: "0.75rem", color: "var(--muted)" }}>{label}</p>
+      <p style={{ margin: 0, fontSize: "0.85rem", color: "var(--text)" }}>{value}</p>
+    </div>
+  );
+}
+
+export default function ProjectDetailPage(): ReactElement {
+  const router = useRouter();
+  const params = useParams<{ id: string | string[] }>();
+  const workspaceId = useWorkspaceId();
+  const rawProjectId = params.id;
+  const projectId = Array.isArray(rawProjectId) ? (rawProjectId[0] ?? null) : rawProjectId;
+
+  const [project, setProject] = useState<ProjectDetail | null>(null);
+  const [isLoading, setIsLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+
+  const loadProject = useCallback(async (id: string, wsId: string): Promise<void> => {
+    try {
+      setIsLoading(true);
+      setError(null);
+      const data = await fetchProject(id, wsId);
+      setProject(data);
+    } catch (err: unknown) {
+      console.error("[ProjectDetail] Failed to fetch project:", err);
+      setProject(null);
+      setError(toFriendlyErrorMessage(err));
+    } finally {
+      setIsLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    if (!projectId) {
+      setProject(null);
+      setError("The project link is invalid. Please return to the projects page.");
+      setIsLoading(false);
+      return;
+    }
+
+    if (!workspaceId) {
+      setProject(null);
+      setError("Select a workspace to view this project.");
+      setIsLoading(false);
+      return;
+    }
+
+    const id = projectId;
+    const wsId = workspaceId;
+    let cancelled = false;
+
+    async function load(): Promise<void> {
+      try {
+        setIsLoading(true);
+        setError(null);
+        const data = await fetchProject(id, wsId);
+        if (!cancelled) {
+          setProject(data);
+        }
+      } catch (err: unknown) {
+        console.error("[ProjectDetail] Failed to fetch project:", err);
+        if (!cancelled) {
+          setProject(null);
+          setError(toFriendlyErrorMessage(err));
+        }
+      } finally {
+        if (!cancelled) {
+          setIsLoading(false);
+        }
+      }
+    }
+
+    void load();
+
+    return (): void => {
+      cancelled = true;
+    };
+  }, [projectId, workspaceId]);
+
+  function handleRetry(): void {
+    if (!projectId || !workspaceId) return;
+    void loadProject(projectId, workspaceId);
+  }
+
+  function handleBack(): void {
+    router.push("/projects");
+  }
+
+  const projectStatus = project ? getProjectStatusStyle(project.status) : null;
+  const projectPriority = project ? getPriorityStyle(project.priority) : null;
+  const dueDate = project?.dueDate ?? project?.endDate;
+  const creator =
+    project?.creator.name && project.creator.name.trim().length > 0
+      ? `${project.creator.name} (${project.creator.email})`
+      : (project?.creator.email ?? "Unknown");
+
+  return (
+    <main className="container mx-auto px-4 py-8" style={{ maxWidth: 960 }}>
+      <button
+        onClick={handleBack}
+        style={{
+          display: "inline-flex",
+          alignItems: "center",
+          gap: 8,
+          marginBottom: 20,
+          padding: "8px 12px",
+          borderRadius: "var(--r)",
+          border: "1px solid var(--border)",
+          background: "var(--surface)",
+          color: "var(--text-2)",
+          fontSize: "0.85rem",
+          fontWeight: 500,
+          cursor: "pointer",
+        }}
+      >
+        <ArrowLeft size={16} />
+        Back to projects
+      </button>
+
+      {isLoading ? (
+        <div className="flex justify-center py-16">
+          <MosaicSpinner label="Loading project..." />
+        </div>
+      ) : error !== null ? (
+        <div
+          style={{
+            background: "var(--surface)",
+            border: "1px solid var(--border)",
+            borderRadius: "var(--r-lg)",
+            padding: 32,
+            textAlign: "center",
+          }}
+        >
+          <p style={{ color: "var(--danger)", margin: "0 0 20px" }}>{error}</p>
+          <div style={{ display: "flex", gap: 12, justifyContent: "center", flexWrap: "wrap" }}>
+            <button
+              onClick={handleBack}
+              style={{
+                padding: "8px 16px",
+                background: "transparent",
+                border: "1px solid var(--border)",
+                borderRadius: "var(--r)",
+                color: "var(--text-2)",
+                fontSize: "0.85rem",
+                cursor: "pointer",
+              }}
+            >
+              Back to projects
+            </button>
+            <button
+              onClick={handleRetry}
+              style={{
+                padding: "8px 16px",
+                background: "var(--danger)",
+                border: "none",
+                borderRadius: "var(--r)",
+                color: "#fff",
+                fontSize: "0.85rem",
+                fontWeight: 500,
+                cursor: "pointer",
+              }}
+            >
+              Try again
+            </button>
+          </div>
+        </div>
+      ) : project === null ? (
+        <div
+          style={{
+            background: "var(--surface)",
+            border: "1px solid var(--border)",
+            borderRadius: "var(--r-lg)",
+            padding: 32,
+            textAlign: "center",
+          }}
+        >
+          <p style={{ color: "var(--muted)", margin: 0 }}>Project details are not available.</p>
+        </div>
+      ) : (
+        <div style={{ display: "flex", flexDirection: "column", gap: 16 }}>
+          <section
+            style={{
+              background: "var(--surface)",
+              border: "1px solid var(--border)",
+              borderRadius: "var(--r-lg)",
+              padding: 24,
+            }}
+          >
+            <div
+              style={{
+                display: "flex",
+                justifyContent: "space-between",
+                alignItems: "flex-start",
+                gap: 12,
+                flexWrap: "wrap",
+              }}
+            >
+              <div style={{ minWidth: 0 }}>
+                <h1
+                  style={{ margin: 0, fontSize: "1.875rem", fontWeight: 700, color: "var(--text)" }}
+                >
+                  {project.name}
+                </h1>
+              </div>
+              <div style={{ display: "flex", gap: 8, flexWrap: "wrap" }}>
+                {projectStatus && <StatusBadge style={projectStatus} />}
+                {projectPriority && <StatusBadge style={projectPriority} />}
+              </div>
+            </div>
+
+            {project.description ? (
+              <p
+                style={{
+                  margin: "14px 0 0",
+                  color: "var(--muted)",
+                  fontSize: "0.9rem",
+                  lineHeight: 1.6,
+                }}
+              >
+                {project.description}
+              </p>
+            ) : (
+              <p
+                style={{
+                  margin: "14px 0 0",
+                  color: "var(--muted)",
+                  fontSize: "0.9rem",
+                  lineHeight: 1.6,
+                  fontStyle: "italic",
+                }}
+              >
+                No description provided.
+              </p>
+            )}
+
+            <div className="grid grid-cols-1 md:grid-cols-2 gap-3" style={{ marginTop: 18 }}>
+              <MetaItem label="Start date" value={formatDate(project.startDate)} />
+              <MetaItem label="Due date" value={formatDate(dueDate)} />
+              <MetaItem label="Created" value={formatDateTime(project.createdAt)} />
+              <MetaItem label="Updated" value={formatDateTime(project.updatedAt)} />
+              <MetaItem label="Creator" value={creator} />
+              <MetaItem
+                label="Work items"
+                value={`${String(project._count.tasks)} tasks · ${String(project._count.events)} events`}
+              />
+            </div>
+          </section>
+
+          <section
+            style={{
+              background: "var(--surface)",
+              border: "1px solid var(--border)",
+              borderRadius: "var(--r-lg)",
+              padding: 24,
+            }}
+          >
+            <h2 style={{ margin: "0 0 12px", fontSize: "1.1rem", color: "var(--text)" }}>
+              Tasks ({String(project._count.tasks)})
+            </h2>
+
+            {project.tasks.length === 0 ? (
+              <p style={{ margin: 0, color: "var(--muted)", fontSize: "0.9rem" }}>
+                No tasks yet for this project.
+              </p>
+            ) : (
+              <div>
+                {project.tasks.map((task, index) => (
+                  <div
+                    key={task.id}
+                    style={{
+                      padding: "12px 0",
+                      borderTop: index === 0 ? "none" : "1px solid var(--border)",
+                    }}
+                  >
+                    <div
+                      style={{
+                        display: "flex",
+                        alignItems: "flex-start",
+                        justifyContent: "space-between",
+                        gap: 12,
+                        flexWrap: "wrap",
+                      }}
+                    >
+                      <div style={{ minWidth: 0 }}>
+                        <p style={{ margin: 0, color: "var(--text)", fontWeight: 500 }}>
+                          {task.title}
+                        </p>
+                        <p style={{ margin: "4px 0 0", color: "var(--muted)", fontSize: "0.8rem" }}>
+                          Due: {formatDate(task.dueDate)}
+                        </p>
+                      </div>
+                      <div style={{ display: "flex", gap: 8, flexWrap: "wrap" }}>
+                        <StatusBadge style={getTaskStatusStyle(task.status)} />
+                        <StatusBadge style={getPriorityStyle(task.priority)} />
+                      </div>
+                    </div>
+                  </div>
+                ))}
+              </div>
+            )}
+          </section>
+
+          <section
+            style={{
+              background: "var(--surface)",
+              border: "1px solid var(--border)",
+              borderRadius: "var(--r-lg)",
+              padding: 24,
+            }}
+          >
+            <h2 style={{ margin: "0 0 12px", fontSize: "1.1rem", color: "var(--text)" }}>
+              Events ({String(project._count.events)})
+            </h2>
+
+            {project.events.length === 0 ? (
+              <p style={{ margin: 0, color: "var(--muted)", fontSize: "0.9rem" }}>
+                No events scheduled for this project.
+              </p>
+            ) : (
+              <div>
+                {project.events.map((event, index) => (
+                  <div
+                    key={event.id}
+                    style={{
+                      padding: "12px 0",
+                      borderTop: index === 0 ? "none" : "1px solid var(--border)",
+                    }}
+                  >
+                    <p style={{ margin: 0, color: "var(--text)", fontWeight: 500 }}>
+                      {event.title}
+                    </p>
+                    <p style={{ margin: "4px 0 0", color: "var(--muted)", fontSize: "0.8rem" }}>
+                      {formatDateTime(event.startTime)} - {formatDateTime(event.endTime)}
+                    </p>
+                  </div>
+                ))}
+              </div>
+            )}
+          </section>
+        </div>
+      )}
+    </main>
+  );
+}

apps/web/src/lib/api/projects.ts

@@ -25,7 +25,9 @@ export interface Project {
   name: string;
   description: string | null;
   status: ProjectStatus;
+  priority?: string | null;
   startDate: string | null;
+  dueDate?: string | null;
   endDate: string | null;
   creatorId: string;
   domainId: string | null;
@@ -35,6 +37,54 @@ export interface Project {
   updatedAt: string;
 }
 
+/**
+ * Minimal creator details included on project detail response
+ */
+export interface ProjectCreator {
+  id: string;
+  name: string | null;
+  email: string;
+}
+
+/**
+ * Task row included on project detail response
+ */
+export interface ProjectTaskSummary {
+  id: string;
+  title: string;
+  status: string;
+  priority: string;
+  dueDate: string | null;
+}
+
+/**
+ * Event row included on project detail response
+ */
+export interface ProjectEventSummary {
+  id: string;
+  title: string;
+  startTime: string;
+  endTime: string | null;
+}
+
+/**
+ * Counts included on project detail response
+ */
+export interface ProjectDetailCounts {
+  tasks: number;
+  events: number;
+}
+
+/**
+ * Single-project response with related details
+ */
+export interface ProjectDetail extends Project {
+  creator: ProjectCreator;
+  tasks: ProjectTaskSummary[];
+  events: ProjectEventSummary[];
+  _count: ProjectDetailCounts;
+}
+
 /**
  * DTO for creating a new project
  */
@@ -72,8 +122,8 @@ export async function fetchProjects(workspaceId?: string): Promise<Project[]> {
 /**
  * Fetch a single project by ID
  */
-export async function fetchProject(id: string, workspaceId?: string): Promise<Project> {
-  return apiGet<Project>(`/api/projects/${id}`, workspaceId);
+export async function fetchProject(id: string, workspaceId?: string): Promise<ProjectDetail> {
+  return apiGet<ProjectDetail>(`/api/projects/${id}`, workspaceId);
 }
 
 /**