style(gui): Apply strict vertical compaction and add type hints

conductor/product-guidelines.md

@@ -38,6 +38,8 @@
 
 - **Indentation:** Exactly **1 space** per level. This minimizes token usage in nested structures.
 - **Newlines:** Maximum **one (1)** blank line between top-level definitions. **Zero (0)** blank lines within function or method bodies.
+- **Vertical Compaction:** Use single-line `if` statements, semicolon-separated framework calls (`imgui.same_line(); imgui.text(...)`), and aligned assignments to aggressively minimize vertical line counts. **Note:** Function and method definition signatures (`def ...:`) must ALWAYS remain on their own isolated lines.
+- **Region Blocks:** Use `#region: Name` and `#endregion: Name` to logically organize massive files that cannot be easily broken apart without increasing context load.
 - **Type Hinting:** Mandatory, strict type hints for all parameters, return types, and global variables to ensure high-signal context for AI agents.
 - **Structural Dependency Mapping (SDM):** All major state variables, methods, and functions MUST include terse dependency tags at the end of their docstrings for AI-assisted impact analysis.
   - **Functions/Methods:** `[C: Caller1, Caller2]` (Primary callers).