feat: add Home page with user dashboard and habit tracking features

- Implemented Home component with user authentication and loading states.
- Created Welcome component for unauthenticated users with a sign-in option.
- Developed Dashboard component to display user's habits and progress.
- Added functionality for habit management, including adding, updating, and deleting habits.
- Integrated HabitChart and HabitHistory components for visual representation of habits.
- Introduced sharing functionality for progress via Discord integration.

feat: establish Discord sharing configuration and routes

- Added DiscordSharingConfig type and readDiscordSharingConfig function for environment variable management.
- Created sharing contracts for input validation and data structure.
- Implemented sharing routes for previewing and sending progress images to Discord.
- Added tests for sharing routes to ensure authentication and proper error handling.

scripts/dashboard-preview.ts

@@ -6,6 +6,19 @@ import index from "../src/index.html";
 const f = fixture();
 const origin = "http://127.0.0.1:3107";
 const previewCookie = "minabot_dashboard_preview_session";
+const sharingPreview = process.env.SHARE_PREVIEW === "1";
+let sharedImage: Blob | null = null;
+if (sharingPreview) {
+  f.setTime("2026-08-01T12:00:00Z");
+  const reading = await f.json("/habits", "POST", { name: "A few pages, every day", method: "count", target: 10, unit: "pages", color: "#90647e" }, 201);
+  const walking = await f.json("/habits", "POST", { name: "An afternoon walk", method: "manual", schedule: { type: "weekdays", days: [1, 3, 5] }, color: "#397f76" }, 201);
+  for (let i = 0; i < 35; i++) {
+    const date = new Date(Date.UTC(2026, 7, 1 + i)).toISOString().slice(0, 10);
+    f.setTime(`${date}T12:00:00Z`);
+    if (i % 4 !== 0) await f.json(`/habits/${reading.id}/days/${date}/progress`, "PUT", { count: i % 3 === 0 ? 5 : 10 });
+    if ([1, 3, 5].includes(new Date(`${date}T12:00:00Z`).getUTCDay()) && i % 4 !== 0) await f.json(`/habits/${walking.id}/days/${date}/progress`, "PUT", { done: true });
+  }
+}
 const app = createApi(
   f.db,
   {
@@ -16,11 +29,20 @@ const app = createApi(
   },
   undefined,
   () => Date.parse("2026-09-04T12:00:00Z"),
+  sharingPreview ? async (_url, init) => {
+    if (init?.method === "POST") {
+      sharedImage = (init.body as FormData).get("files[0]") as Blob;
+      return Response.json({ id: "423456789012345678" });
+    }
+    return Response.json({ type: 0, id: "223456789012345678", guild_id: "323456789012345678", name: "preview-only" });
+  } : undefined,
+  sharingPreview ? { token: "preview-bot-token", channelId: "223456789012345678" } : undefined,
 );
 const server = Bun.serve({
   hostname: "127.0.0.1",
   port: 3107,
   routes: {
+    "/__preview/shared-image": () => sharingPreview && sharedImage ? new Response(sharedImage) : new Response(null, { status: 404 }),
     "/__preview/login": () =>
       new Response(null, {
         status: 302,