Add phx.gen.auth authentication scaffolding

- LiveView-based email/password auth via mix phx.gen.auth
- Auth links removed from public navigation (direct URL access only)
- Accounts context with User schema and token management

app/config/config.exs

@@ -7,6 +7,19 @@
 # General application configuration
 import Config
 
+config :firehose, :scopes,
+  user: [
+    default: true,
+    module: Firehose.Accounts.Scope,
+    assign_key: :current_scope,
+    access_path: [:user, :id],
+    schema_key: :user_id,
+    schema_type: :id,
+    schema_table: :users,
+    test_data_fixture: Firehose.AccountsFixtures,
+    test_setup_helper: :register_and_log_in_user
+  ]
+
 config :firehose,
   ecto_repos: [Firehose.Repo],
   generators: [timestamp_type: :utc_datetime]

app/config/test.exs

@@ -1,5 +1,8 @@
 import Config
 
+# Only in tests, remove the complexity from the password hashing algorithm
+config :bcrypt_elixir, :log_rounds, 1
+
 # Configure your database
 #
 # The MIX_TEST_PARTITION environment variable can be used