feat(chat): Implement end-to-end encrypted swarm messaging system

- Add Swarm Chat documentation with architecture, API endpoints, and security considerations
- Create database schema for chat conversations, messages, and typing indicators
- Implement chat API endpoints for sending, receiving, and managing messages
- Add client-side encryption utilities using RSA-OAEP with SHA-256
- Create chat page UI for viewing conversations and messages
- Add chat type definitions for TypeScript support
- Update database schema with new chat tables and relationships
- Update sidebar navigation to include chat link
- Enable true end-to-end encrypted messaging across swarm nodes without ActivityPub limitations

drizzle/0008_illegal_carlie_cooper.sql

@@ -0,0 +1,46 @@
+CREATE TABLE "chat_conversations" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"type" text DEFAULT 'direct' NOT NULL,
+	"participant1_id" uuid NOT NULL,
+	"participant2_handle" text NOT NULL,
+	"last_message_at" timestamp,
+	"last_message_preview" text,
+	"created_at" timestamp DEFAULT now() NOT NULL,
+	"updated_at" timestamp DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+CREATE TABLE "chat_messages" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"conversation_id" uuid NOT NULL,
+	"sender_handle" text NOT NULL,
+	"sender_display_name" text,
+	"sender_avatar_url" text,
+	"sender_node_domain" text,
+	"encrypted_content" text NOT NULL,
+	"swarm_message_id" text,
+	"delivered_at" timestamp,
+	"read_at" timestamp,
+	"created_at" timestamp DEFAULT now() NOT NULL,
+	CONSTRAINT "chat_messages_swarm_message_id_unique" UNIQUE("swarm_message_id")
+);
+--> statement-breakpoint
+CREATE TABLE "chat_typing_indicators" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"conversation_id" uuid NOT NULL,
+	"user_handle" text NOT NULL,
+	"expires_at" timestamp NOT NULL,
+	"created_at" timestamp DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+ALTER TABLE "chat_conversations" ADD CONSTRAINT "chat_conversations_participant1_id_users_id_fk" FOREIGN KEY ("participant1_id") REFERENCES "public"."users"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "chat_messages" ADD CONSTRAINT "chat_messages_conversation_id_chat_conversations_id_fk" FOREIGN KEY ("conversation_id") REFERENCES "public"."chat_conversations"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "chat_typing_indicators" ADD CONSTRAINT "chat_typing_indicators_conversation_id_chat_conversations_id_fk" FOREIGN KEY ("conversation_id") REFERENCES "public"."chat_conversations"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+CREATE INDEX "chat_conversations_participant1_idx" ON "chat_conversations" USING btree ("participant1_id");--> statement-breakpoint
+CREATE INDEX "chat_conversations_last_message_idx" ON "chat_conversations" USING btree ("last_message_at");--> statement-breakpoint
+CREATE UNIQUE INDEX "chat_conversations_unique" ON "chat_conversations" USING btree ("participant1_id","participant2_handle");--> statement-breakpoint
+CREATE INDEX "chat_messages_conversation_idx" ON "chat_messages" USING btree ("conversation_id");--> statement-breakpoint
+CREATE INDEX "chat_messages_created_idx" ON "chat_messages" USING btree ("created_at");--> statement-breakpoint
+CREATE INDEX "chat_messages_swarm_id_idx" ON "chat_messages" USING btree ("swarm_message_id");--> statement-breakpoint
+CREATE INDEX "chat_typing_conversation_idx" ON "chat_typing_indicators" USING btree ("conversation_id");--> statement-breakpoint
+CREATE INDEX "chat_typing_expires_idx" ON "chat_typing_indicators" USING btree ("expires_at");--> statement-breakpoint
+CREATE UNIQUE INDEX "chat_typing_unique" ON "chat_typing_indicators" USING btree ("conversation_id","user_handle");

drizzle/meta/_journal.json

@@ -57,6 +57,13 @@
       "when": 1769446756226,
       "tag": "0007_kind_agent_zero",
       "breakpoints": true
+    },
+    {
+      "idx": 8,
+      "version": "7",
+      "when": 1769453302714,
+      "tag": "0008_illegal_carlie_cooper",
+      "breakpoints": true
     }
   ]
 }