[BUG] [v0.0.7] BRAIN_WIDTH constant is 37 but all BRAIN_ART lines are 36 characters wide (off-by-one)

[Antics7777]

Description

In cortex-core/src/widgets/brain.rs, the BRAIN_WIDTH constant is set to 37, but every line in BRAIN_ART is exactly 36 characters wide.

const BRAIN_ART: &[&str] = &[
    "          %%#*##*****###@@          ",  // 36 chars
    "      @%***+****+++#+**#%#@@@@      ",  // 36 chars
    // ... all 12 lines are 36 chars
    "@#*#*++++@#****+++++*##++##%%%*#@@@@", // 36 chars (no padding)
    // ...
];

const BRAIN_WIDTH: u16 = 37;  // BUG: should be 36

This off-by-one causes three incorrect behaviors:

1. Centering is shifted: area.width.saturating_sub(BRAIN_WIDTH) / 2 subtracts 37 instead of 36, shifting the brain right by ~0.5 characters
2. Wave animation center is wrong: center_x = BRAIN_WIDTH as f32 / 2.0 = 18.5 instead of 18.0, making the radial pulsation asymmetric
3. Concentric band animation center is wrong: get_display_char also uses BRAIN_WIDTH for its center, creating off-center band rings

Error Message

No crash, but visually incorrect behavior: the wave and band animations pulse from an off-center point (18.5 instead of 18.0).

Debug Logs

Verified by measuring all 12 art lines:

Line 01 Length=36: [          %%#*##*****###@@          ]
Line 02 Length=36: [      @%***+****+++#+**#%#@@@@      ]
Line 03 Length=36: [    @%*++*%#*+*+*#+++##*%%++@@@@    ]
Line 04 Length=36: [ @%***+**+++***+*#++*****%%@@%*%@@  ]
Line 05 Length=36: [ %++****+##++*++*##******%@*#@%#@@@ ]
Line 06 Length=36: [@#*#*++++@#****+++++*##++##%%%*#@@@@]
Line 07 Length=36: [%*++*+++***+*#*+++**++++**%@%#*%@@@@]
Line 08 Length=36: [@**+**+**+#*#+++#*+###*#####@@@@@@@@]
Line 09 Length=36: [ ##@@%@@#+#**###%@@%%%%#####%@@@@@@@]
Line 10 Length=36: [   @@@@ @@@@@#%@@@@@@%*+**#*#@@@@   ]
Line 11 Length=36: [           @@@@   @@%%@%%%%%%@@@    ]
Line 12 Length=36: [                     @##@@@@@@      ]

System Information

Bounty Challenge System Information
====================================
Version: 0.1.0
## Operating System
  OS: Windows
  Version: Microsoft Windows [Version 10.0.26200.7840]
## Build Environment
  Rust: rustc 1.90.0 (1159e78c4 2025-09-14)
  Target: x86_64
====================================

Steps to Reproduce

1. Count character widths of BRAIN_ART lines in cortex-core/src/widgets/brain.rs
2. Compare with BRAIN_WIDTH constant (37)
3. All 12 lines are 36 characters — BRAIN_WIDTH is off by one

Or, observe the animation center point: center_x = BRAIN_WIDTH as f32 / 2.0 = 18.5, but the actual center of a 36-char-wide art is 18.0.

Expected Behavior

BRAIN_WIDTH should be 36 to match the actual art width. The wave animation and centering should use the correct width.

Actual Behavior

BRAIN_WIDTH is 37, causing off-center wave animation and slightly shifted centering.

Additional Context

• Affected code: cortex-core/src/widgets/brain.rs:50
• Fix: Change const BRAIN_WIDTH: u16 = 37; to const BRAIN_WIDTH: u16 = 36;