v3: chatbox improvements (typing indicators, answer to previous messages, backlog days separators, scroll to last message position, visual tweaks)

api/db/migrate.ts

@@ -7,6 +7,7 @@ import { up as up0005DropIsAdmin } from "./migrations/0005_drop_is_admin.ts";
 import { up as up0006Categories } from "./migrations/0006_categories.ts";
 import { up as up0007PasswordResetTokens } from "./migrations/0007_password_reset_tokens.ts";
 import { up as up0008ChatMessages } from "./migrations/0008_chat_messages.ts";
+import { up as up0009ChatReply } from "./migrations/0009_chat_reply.ts";
 
 interface Migration {
   name: string;
@@ -25,6 +26,7 @@ const MIGRATIONS: Migration[] = [
   { name: "0006_categories", up: up0006Categories },
   { name: "0007_password_reset_tokens", up: up0007PasswordResetTokens },
   { name: "0008_chat_messages", up: up0008ChatMessages },
+  { name: "0009_chat_reply", up: up0009ChatReply },
 ];
 
 export function runMigrations(db: DatabaseSync): void {

api/db/migrations/0009_chat_reply.ts

@@ -0,0 +1,17 @@
+import type { DatabaseSync } from "node:sqlite";
+
+// Adds an optional self-reference so a chat message can reply to another.
+// Kept as a plain column (no FK): when the replied-to message is later deleted
+// the id is retained but the join yields null, letting the UI show a subtle
+// "deleted message" reference instead of breaking the insert.
+//
+// Idempotent: also runs against fresh databases created from schema.sql, where
+// the column already exists.
+export function up(db: DatabaseSync): void {
+  const cols = db.prepare(`PRAGMA table_info(chat_messages);`).all() as {
+    name: string;
+  }[];
+  if (!cols.some((c) => c.name === "reply_to_id")) {
+    db.exec(`ALTER TABLE chat_messages ADD COLUMN reply_to_id TEXT;`);
+  }
+}

api/db/schema.sql

@@ -194,11 +194,12 @@ CREATE UNIQUE INDEX idx_notifications_dedup
   WHERE source_key IS NOT NULL;
 
 CREATE TABLE chat_messages (
-  id         TEXT NOT NULL PRIMARY KEY,
-  user_id    TEXT NOT NULL,
-  body       TEXT NOT NULL,
-  created_at TEXT NOT NULL,
-  updated_at TEXT,
+  id          TEXT NOT NULL PRIMARY KEY,
+  user_id     TEXT NOT NULL,
+  body        TEXT NOT NULL,
+  created_at  TEXT NOT NULL,
+  updated_at  TEXT,
+  reply_to_id TEXT,
   FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
 );
 CREATE INDEX idx_chat_messages_created ON chat_messages(created_at);