Add CLI tool and test infrastructure with real SQLite fixtures

- Create ctm-cli binary for debugging (JTAG-style access to internals)
 - list-chats: List all iMessage chats with contact resolution
 - contacts: Show contacts index statistics
 - check-access: Verify Full Disk Access permission

- Add FactoryBot-style test data builders (test_fixtures module)
 - TestIMessageDb: Creates in-memory iMessage database with real schema
 - TestAddressBookDb: Creates in-memory AddressBook database with real schema
 - Builders: HandleBuilder, ChatBuilder, MessageBuilder, ContactBuilder

- Set up fixtures/schemas/ with versioned database schemas
 - imessage_26.0.1.sql: Real iMessage database schema
 - addressbook_26.0.1.sql: Real AddressBook database schema
 - scripts/update-schemas.sh: Schema dump/diff/version script

- Fix deduped_id vs handle_id bug in resolve_chat_display_name
 - Handle::dedupe creates NEW sequential IDs, not identity mapping
 - Added deduped_handles parameter to translate before lookup

- Refactor: Extract shared code into lib.rs, simplify main.rs

28 tests passing (14 unit + 8 integration + 6 fixture tests)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: ndbroadbent

src-tauri/Cargo.lock

@@ -12,21 +12,35 @@ rust-version = "1.70"
 tauri-build = { version = "2", features = [] }
 
 [dependencies]
-tauri = { version = "2", features = [] }
-tauri-plugin-shell = "2"
+tauri = { version = "2", features = [], optional = true }
+tauri-plugin-shell = { version = "2", optional = true }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 tokio = { version = "1", features = ["full"] }
 anyhow = "1"
 thiserror = "2"
+clap = { version = "4", features = ["derive"] }
 
 # iMessage database access - the core functionality
 imessage-database = "3"
 rusqlite = "0.37"
 
+[lib]
+name = "chat_to_map_desktop"
+path = "src/lib.rs"
+
+[[bin]]
+name = "chat-to-map-desktop"
+path = "src/main.rs"
+required-features = ["desktop"]
+
+[[bin]]
+name = "ctm-cli"
+path = "src/cli.rs"
+
 [features]
-default = ["custom-protocol"]
-custom-protocol = ["tauri/custom-protocol"]
+default = ["desktop"]
+desktop = ["tauri", "tauri-plugin-shell", "tauri/custom-protocol"]
 
 [profile.release]
 panic = "abort"

src-tauri/Cargo.toml

@@ -1,3 +1,6 @@
 fn main() {
-    tauri_build::build()
+    // Only run tauri_build when building the desktop app
+    if std::env::var("CARGO_FEATURE_DESKTOP").is_ok() {
+        tauri_build::build();
+    }
 }