feat: finish the ai plugin (B18)

plugins/ai/migrations/sqlite/0001_adopt_ai_tables.sql

@@ -0,0 +1,60 @@
+-- ai 0001: adopt_ai_tables
+-- Generated by termix-plugin migrations. Review before committing.
+-- Hand-edited: keeps the legacy foreign key from messages and proposals to
+-- their conversation, which the SDK cannot declare.
+
+CREATE TABLE IF NOT EXISTS "ai_providers" (
+  "id" integer PRIMARY KEY AUTOINCREMENT,
+  "user_id" text NOT NULL,
+  "provider_type" text NOT NULL,
+  "label" text NOT NULL,
+  "base_url" text,
+  "api_key_prefix" text,
+  "default_model" text,
+  "enabled" integer NOT NULL DEFAULT 1,
+  "created_at" text NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  "updated_at" text NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  FOREIGN KEY ("user_id") REFERENCES "users" ("id") ON DELETE CASCADE
+);
+CREATE UNIQUE INDEX IF NOT EXISTS "idx_ai_providers_user_label" ON "ai_providers" ("user_id", "label");
+ALTER TABLE "ai_providers" RENAME TO "p_ai_providers";
+CREATE TABLE IF NOT EXISTS "ai_conversations" (
+  "id" integer PRIMARY KEY AUTOINCREMENT,
+  "user_id" text NOT NULL,
+  "title" text,
+  "provider_id" integer,
+  "model" text,
+  "created_at" text NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  "updated_at" text NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  FOREIGN KEY ("user_id") REFERENCES "users" ("id") ON DELETE CASCADE
+);
+CREATE INDEX IF NOT EXISTS "idx_ai_conversations_user" ON "ai_conversations" ("user_id", "updated_at");
+ALTER TABLE "ai_conversations" RENAME TO "p_ai_conversations";
+CREATE TABLE IF NOT EXISTS "ai_messages" (
+  "id" integer PRIMARY KEY AUTOINCREMENT,
+  "conversation_id" integer NOT NULL,
+  "role" text NOT NULL,
+  "content" text NOT NULL DEFAULT '',
+  "tool_calls" text,
+  "created_at" text NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  FOREIGN KEY ("conversation_id") REFERENCES "p_ai_conversations" ("id") ON DELETE CASCADE
+);
+CREATE INDEX IF NOT EXISTS "idx_ai_messages_conversation" ON "ai_messages" ("conversation_id", "created_at");
+ALTER TABLE "ai_messages" RENAME TO "p_ai_messages";
+CREATE TABLE IF NOT EXISTS "ai_proposals" (
+  "id" integer PRIMARY KEY AUTOINCREMENT,
+  "conversation_id" integer NOT NULL,
+  "user_id" text NOT NULL,
+  "kind" text NOT NULL,
+  "summary" text,
+  "payload" text NOT NULL DEFAULT '{}',
+  "status" text NOT NULL DEFAULT 'pending',
+  "applied_at" text,
+  "result_summary" text,
+  "created_at" text NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  FOREIGN KEY ("user_id") REFERENCES "users" ("id") ON DELETE CASCADE,
+  FOREIGN KEY ("conversation_id") REFERENCES "p_ai_conversations" ("id") ON DELETE CASCADE
+);
+CREATE INDEX IF NOT EXISTS "idx_ai_proposals_user" ON "ai_proposals" ("user_id", "status");
+CREATE INDEX IF NOT EXISTS "idx_ai_proposals_conversation" ON "ai_proposals" ("conversation_id");
+ALTER TABLE "ai_proposals" RENAME TO "p_ai_proposals";