feat(tui): Phase 4 completion + Phase 5 session/lock/text-width

Phase 4 (bd-1df9) — all 5 acceptance criteria met:
- Sync screen with delta ledger (bd-2x2h, bd-y095)
- Doctor screen with health checks (bd-2iqk)
- Stats screen with document counts (bd-2iqk)
- CLI integration: lore tui subcommand (bd-26lp)
- CLI integration: lore sync --tui flag (bd-3l56)

Phase 5 (bd-3h00) — session persistence + instance lock + text width:
- text_width.rs: Unicode-aware measurement, truncation, padding (16 tests)
- instance_lock.rs: Advisory PID lock with stale recovery (6 tests)
- session.rs: Atomic write + CRC32 checksum + quarantine (9 tests)

Closes: bd-26lp, bd-3h00, bd-3l56, bd-1df9, bd-y095

crates/lore-tui/src/lib.rs

@@ -34,6 +34,12 @@ pub mod filter_dsl; // Filter DSL tokenizer for list screen filter bars (bd-18qs
 // Phase 4 modules.
 pub mod entity_cache; // Bounded LRU entity cache for detail view reopens (bd-2og9)
 pub mod render_cache; // Bounded render cache for expensive per-frame computations (bd-2og9)
+pub mod scope; // Global scope context: SQL helpers + project listing (bd-1ser)
+
+// Phase 5 modules.
+pub mod instance_lock; // Single-instance advisory lock for TUI (bd-3h00)
+pub mod session; // Session state persistence: save/load/quarantine (bd-3h00)
+pub mod text_width; // Unicode-aware text width measurement + truncation (bd-3h00)
 
 /// Options controlling how the TUI launches.
 #[derive(Debug, Clone)]