feat(web): conversation management — search, rename, delete, archive (#121)

- Add search/filter input to sidebar that filters conversations by title
- Add rename via double-click or context menu (right-click), confirmed with Enter or blur
- Add delete with inline confirmation dialog in context menu
- Add archive/unarchive via context menu with collapsible archived section
- Add auto-title: generates conversation title from first message content
- Show relative timestamps (e.g. "2h ago", "Yesterday") instead of raw dates
- Extend Conversation type with `archived` boolean field
- Add `archived` column + index to conversations DB schema (migration 0001)
- Extend UpdateConversationDto with optional `archived` field

Fixes #121

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/db/drizzle/0001_cynical_ultimatum.sql

@@ -0,0 +1,81 @@
+CREATE TABLE "agent_logs" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"session_id" text NOT NULL,
+	"user_id" text,
+	"level" text DEFAULT 'info' NOT NULL,
+	"category" text DEFAULT 'general' NOT NULL,
+	"content" text NOT NULL,
+	"metadata" jsonb,
+	"tier" text DEFAULT 'hot' NOT NULL,
+	"created_at" timestamp with time zone DEFAULT now() NOT NULL,
+	"summarized_at" timestamp with time zone,
+	"archived_at" timestamp with time zone
+);
+--> statement-breakpoint
+CREATE TABLE "insights" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"user_id" text NOT NULL,
+	"content" text NOT NULL,
+	"embedding" vector(1536),
+	"source" text DEFAULT 'agent' NOT NULL,
+	"category" text DEFAULT 'general' NOT NULL,
+	"relevance_score" real DEFAULT 1 NOT NULL,
+	"metadata" jsonb,
+	"created_at" timestamp with time zone DEFAULT now() NOT NULL,
+	"updated_at" timestamp with time zone DEFAULT now() NOT NULL,
+	"decayed_at" timestamp with time zone
+);
+--> statement-breakpoint
+CREATE TABLE "preferences" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"user_id" text NOT NULL,
+	"key" text NOT NULL,
+	"value" jsonb NOT NULL,
+	"category" text DEFAULT 'general' NOT NULL,
+	"source" text,
+	"created_at" timestamp with time zone DEFAULT now() NOT NULL,
+	"updated_at" timestamp with time zone DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+CREATE TABLE "skills" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"name" text NOT NULL,
+	"description" text,
+	"version" text,
+	"source" text DEFAULT 'custom' NOT NULL,
+	"config" jsonb,
+	"enabled" boolean DEFAULT true NOT NULL,
+	"installed_by" text,
+	"created_at" timestamp with time zone DEFAULT now() NOT NULL,
+	"updated_at" timestamp with time zone DEFAULT now() NOT NULL,
+	CONSTRAINT "skills_name_unique" UNIQUE("name")
+);
+--> statement-breakpoint
+CREATE TABLE "summarization_jobs" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"status" text DEFAULT 'pending' NOT NULL,
+	"logs_processed" integer DEFAULT 0 NOT NULL,
+	"insights_created" integer DEFAULT 0 NOT NULL,
+	"error_message" text,
+	"started_at" timestamp with time zone,
+	"completed_at" timestamp with time zone,
+	"created_at" timestamp with time zone DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+ALTER TABLE "conversations" ADD COLUMN "archived" boolean DEFAULT false NOT NULL;--> statement-breakpoint
+ALTER TABLE "agent_logs" ADD CONSTRAINT "agent_logs_user_id_users_id_fk" FOREIGN KEY ("user_id") REFERENCES "public"."users"("id") ON DELETE set null ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "insights" ADD CONSTRAINT "insights_user_id_users_id_fk" FOREIGN KEY ("user_id") REFERENCES "public"."users"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "preferences" ADD CONSTRAINT "preferences_user_id_users_id_fk" FOREIGN KEY ("user_id") REFERENCES "public"."users"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "skills" ADD CONSTRAINT "skills_installed_by_users_id_fk" FOREIGN KEY ("installed_by") REFERENCES "public"."users"("id") ON DELETE set null ON UPDATE no action;--> statement-breakpoint
+CREATE INDEX "agent_logs_session_id_idx" ON "agent_logs" USING btree ("session_id");--> statement-breakpoint
+CREATE INDEX "agent_logs_user_id_idx" ON "agent_logs" USING btree ("user_id");--> statement-breakpoint
+CREATE INDEX "agent_logs_tier_idx" ON "agent_logs" USING btree ("tier");--> statement-breakpoint
+CREATE INDEX "agent_logs_created_at_idx" ON "agent_logs" USING btree ("created_at");--> statement-breakpoint
+CREATE INDEX "insights_user_id_idx" ON "insights" USING btree ("user_id");--> statement-breakpoint
+CREATE INDEX "insights_category_idx" ON "insights" USING btree ("category");--> statement-breakpoint
+CREATE INDEX "insights_relevance_idx" ON "insights" USING btree ("relevance_score");--> statement-breakpoint
+CREATE INDEX "preferences_user_id_idx" ON "preferences" USING btree ("user_id");--> statement-breakpoint
+CREATE INDEX "preferences_user_key_idx" ON "preferences" USING btree ("user_id","key");--> statement-breakpoint
+CREATE INDEX "skills_enabled_idx" ON "skills" USING btree ("enabled");--> statement-breakpoint
+CREATE INDEX "summarization_jobs_status_idx" ON "summarization_jobs" USING btree ("status");--> statement-breakpoint
+CREATE INDEX "conversations_archived_idx" ON "conversations" USING btree ("archived");