fix: native demo visual parity and v0.1.12 release

[ralyodio]

Changes

• Port all ten TypeScript reference screen layouts to native Go, Python and Zig, including responsive dashboards and detailed Traffic/Sessions tabs.
• Share 120 reference frames across Rust/Go/Python/Zig; compare glyphs, colors and attributes. Document the tightly bounded one-dot Go gauge rounding exception.
• Correct final-viewport table selection, tail-relative log scrolling, component controls and live status information.
• Preserve real telemetry collectors and original website hero/logo; update docs and align release versions to 0.1.12.

Verification

• All native library/demo suites passed (Go race detector, Python 36 tests, Zig, Rust library/example/standalone demo).
• TypeScript typecheck/build and 167 tests passed; website production build passed.
• Regenerated TypeScript reference frames without changing their contents.
• All four native real-data fixture checks and real/simulated PTY launches passed; q exits and restores terminal state.
• All ten Go/Python/Zig screens rendered in real-data mode on the test host.

Scope

This verifies the shared screen layouts, not universal host sensor availability or complete cross-platform/interaction parity. C/C++ remain experimental and do not gain a full dashboard in this release.