P2 slice 6: the viewer

`wanderbooks gui [BOOK]` finds the data root, reads settings from the
journal, the vault of the book, presence through ops/, Save a copy /
Open on every document, Save the W-9, the Export menu, and colour
schemes. One builder for the CPA package and the 1099 worksheet
(ledger-package), shared by the server and the viewer.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01T3gXMVt7XJPi6ens1or9Dj

Cargo.lock

@@ -3887,6 +3887,7 @@ dependencies = [
  "ledger-config",
  "ledger-core",
  "ledger-import",
+ "ledger-package",
  "ledger-store",
  "ledger-vault",
  "notify",
@@ -3894,6 +3895,8 @@ dependencies = [
  "rust_decimal",
  "serde",
  "serde_json",
+ "tempfile",
+ "zip 9.0.2",
 ]
 
 [[package]]
@@ -3952,6 +3955,7 @@ dependencies = [
  "ledger-config",
  "ledger-core",
  "ledger-import",
+ "ledger-package",
  "ledger-store",
  "ledger-vault",
  "libc",
@@ -3974,6 +3978,20 @@ dependencies = [
  "zip 9.0.2",
 ]
 
+[[package]]
+name = "ledger-package"
+version = "0.1.0"
+dependencies = [
+ "chrono",
+ "ledger-core",
+ "ledger-import",
+ "ledger-store",
+ "ledger-vault",
+ "rust_decimal",
+ "tempfile",
+ "zip 9.0.2",
+]
+
 [[package]]
 name = "ledger-store"
 version = "0.1.0"