Initial lookbook implementation

Pinterest-style visual bookmarking app with:
- URL metadata extraction (OG/Twitter meta, oEmbed fallback)
- Image caching in Postgres with 480px thumbnails
- Multi-tag filtering with Ctrl/Cmd for OR mode
- Fuzzy tag suggestions and inline tag editing
- Browser console auth() with first-use password setup
- Brutalist UI with Commit Mono font and Pico CSS
- Light/dark mode via browser preference

internal/migrations/sql/0001_init.sql

@@ -0,0 +1,73 @@
+-- +goose Up
+CREATE EXTENSION IF NOT EXISTS pgcrypto;
+
+CREATE TABLE item (
+	id BIGSERIAL PRIMARY KEY,
+	pub_id UUID NOT NULL DEFAULT gen_random_uuid(),
+	source_url TEXT NOT NULL,
+	title TEXT NOT NULL DEFAULT '',
+	description TEXT NOT NULL DEFAULT '',
+	site_name TEXT NOT NULL DEFAULT '',
+	created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+	updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+	deleted_at TIMESTAMPTZ,
+	UNIQUE (pub_id)
+);
+
+CREATE INDEX idx_item_created_at ON item(created_at DESC);
+CREATE INDEX idx_item_deleted_at ON item(deleted_at);
+
+CREATE TABLE image (
+	id BIGSERIAL PRIMARY KEY,
+	item_id BIGINT NOT NULL REFERENCES item(id) ON DELETE CASCADE,
+	original_url TEXT NOT NULL DEFAULT '',
+	content_type TEXT NOT NULL DEFAULT '',
+	bytes BYTEA NOT NULL,
+	width INT NOT NULL DEFAULT 0,
+	height INT NOT NULL DEFAULT 0,
+	is_thumb BOOLEAN NOT NULL DEFAULT FALSE,
+	created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX idx_image_item ON image(item_id);
+CREATE INDEX idx_image_thumb ON image(item_id, is_thumb);
+
+CREATE TABLE tag (
+	id BIGSERIAL PRIMARY KEY,
+	name TEXT NOT NULL UNIQUE,
+	created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE TABLE item_tag (
+	item_id BIGINT NOT NULL REFERENCES item(id) ON DELETE CASCADE,
+	tag_id BIGINT NOT NULL REFERENCES tag(id) ON DELETE CASCADE,
+	PRIMARY KEY (item_id, tag_id)
+);
+
+CREATE INDEX idx_item_tag_item ON item_tag(item_id);
+CREATE INDEX idx_item_tag_tag ON item_tag(tag_id);
+
+CREATE TABLE auth (
+	id BIGSERIAL PRIMARY KEY,
+	password_hash BYTEA NOT NULL,
+	created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE TABLE session (
+	id BIGSERIAL PRIMARY KEY,
+	token TEXT NOT NULL UNIQUE,
+	created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+	expires_at TIMESTAMPTZ NOT NULL
+);
+
+CREATE INDEX idx_session_token ON session(token);
+CREATE INDEX idx_session_expires_at ON session(expires_at);
+
+-- +goose Down
+DROP TABLE IF EXISTS session;
+DROP TABLE IF EXISTS auth;
+DROP TABLE IF EXISTS item_tag;
+DROP TABLE IF EXISTS tag;
+DROP TABLE IF EXISTS image;
+DROP TABLE IF EXISTS item;
+DROP EXTENSION IF EXISTS pgcrypto;