fix: overhaul benchmark dashboard UI and fix broken URLs

[strawgate]

Summary

Fixes multiple issues with the benchmark dashboard that made it non-functional and hard to use.

Bug Fixes

• [object Object] errors: Run IDs were being used as objects instead of extracting the .id field, causing all data fetches to fail
• Broken URLs: bench.yml workflow and benchmarking.md docs pointed to wrong domains (strawgate.com → strawgate.github.io) and paths (/dev/bench/ → /bench/)
• Undefined canvasId in run.html caused charts on the run detail page to silently fail

UX Improvements

• Friendly scenario names: passthrough → Passthrough (No Transforms), json_parse → JSON Parsing & Extraction, etc.
• Inline config snippets: Each scenario shows the actual SQL transform used (e.g. SELECT * FROM logs WHERE level_str IN ('WARN', 'ERROR')), so readers know exactly what the benchmark is doing
• Removed stddev columns from competitive and run tables — throughput (LPS) is the metric people care about
• Added navigation: "← Back to Docs" link on all dashboard pages connects back to the mdBook site

Styling

• Replaced heavy glassmorphism (translucent blurs, radial gradients) with clean solid backgrounds
• Improved text contrast for readability in both light and dark mode
• Modernized typography with Inter font

Files Changed

File	Change
bench/dashboard/style.css	Full CSS overhaul
bench/dashboard/index.html	Friendly names, nav link, ID extraction fix
bench/dashboard/competitive.html	Friendly names, nav link, remove stddev, ID extraction fix
bench/dashboard/run.html	Friendly names, nav link, remove stddev, canvasId fix
.github/workflows/bench.yml	Fix dashboard URLs in issue reports
book/src/development/benchmarking.md	Fix docs URL path

[coderabbitai]

Caution

Review failed

Pull request was closed or merged during review

Walkthrough

This pull request updates benchmark dashboard infrastructure and presentation. It migrates GitHub Pages URLs from strawgate.com to strawgate.github.io in workflow configuration and documentation. Across three HTML dashboard files, it introduces consistent SCENARIO_NAMES mappings and helper functions to display human-readable scenario titles instead of raw IDs. The table layouts in competitive and run dashboards are modified to remove standard deviation columns. A comprehensive CSS refactor modernizes typography, introduces Inter webfont, adjusts color tokens and spacing, reworks navigation and card styling, and updates responsive breakpoints.

Possibly related PRs

• feat: Benchmark reorg — fix failures, dual mode, github-action-benchmark #66: Modifies the benchmark workflow to update GitHub Pages URLs in issued output
• feat: Benchmark logfwd vs vector, fluent-bit, filebeat, otelcol, and vlagent #33: Alters benchmark workflow reporting steps and dashboard configuration

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