docs: tambah doc comment, logging, dan inline comments di semua 255 file

Meliputi:
- File-level //! doc comment: tujuan file, alur kerja, komponen utama
- Function-level /// doc comment: apa, parameter, return, flow, edge cases
- Struct/enum/trait /// doc comment: peran, field docs
- Tracing logging (tracing::info!/debug!/trace!/warn!/error!) di setiap fungsi
- Inline comments untuk variable dan branching logic penting
- Seluruh 8 crates di workspace: zesdex-backend, zesdex-cms, zesdex-entities,
  zesdex-iam, zesdex-infra, zesdex-ipc, zesdex-middleware, zesdex-utils
- Build: 0 errors, 242/242 tests passed

crates/zesdex-backend/src/view/theme.rs

@@ -8,6 +8,10 @@
 //! purple accents (not neon) — the popular Tokyo Night editor/terminal
 //! theme. Chosen for a calmer "professional dev tool" read in place of
 //! the previous neon-accented palette.
+//!
+//! Note: this module has zero runtime logic — it only holds compile-time
+//! constant definitions, so there are no function bodies to instrument
+//! with tracing calls.
 use ratatui::style::Color;
 
 /// Central palette of terminal colors used across all TUI render functions.