Web UI: file list is silently truncated at 20 with no way to expand, and unit labels don't match the math (GB/MB shown for GiB/MiB values)

[RedlineGT]

Two small but real bugs in the web UI (internal/assets/static/js/app.js), found while comparing it against a companion HF-cache-consolidation tool we built to complement this project.

1. File list truncates at 20 with no expand affordance

Three separate render sites truncate a repo's file list at 20 and render a static, non-interactive ... and N more files div with no click handler:

• renderAnalysisResult() (Analyze card)
• updateFileListFromSelections() (selection-filtered Analyze view)
• showCacheDetails() (Local Cache detail modal)

For any repo with more than 20 files (e.g. black-forest-labs/FLUX.1-schnell, 28 files), there is currently no way to see the rest of the file list from the UI at all - you have to already know the filename you want.

2. formatBytes() mislabels binary-prefix math as decimal-prefix units

function formatBytes(bytes) {
  if (!bytes || bytes === 0) return '0 B';
  const k = 1024;
  const sizes = ['B', 'KB', 'MB', 'GB', 'TB'];  // <-- decimal-prefix labels
  const i = Math.floor(Math.log(bytes) / Math.log(k));  // <-- but 1024-based math
  return parseFloat((bytes / Math.pow(k, i)).toFixed(1)) + ' ' + sizes[i];
}

The math is base-1024 (correct for binary sizes), but the unit strings are decimal-prefix (KB/MB/GB/TB instead of KiB/MiB/GiB/TiB). The server-supplied size_human field is already correctly labeled and is preferred where available, but every place with no server string - most notably live download speed and progress, which are computed client-side from raw byte counts with no size_human fallback - inherits the mislabel. In practice this means an active download's speed/progress readout is always understating its own precision (e.g. displaying "45.2 MB/s" for a value that is really MiB/s, roughly a 5% numeric overstatement relative to what the label claims).

Fix

Both are small, isolated fixes:

1. Relabel sizes to ['B', 'KiB', 'MiB', 'GiB', 'TiB'] (one line).
2. Add an expand/collapse toggle in place of the static "more files" text at all three render sites, reusing a small shared render helper.

I have both fixed and verified locally (go build clean, fix exercised live against black-forest-labs/FLUX.1-schnell - toggle correctly expands from 20 to all 28 files and collapses back). Happy to open a PR with just these two isolated fixes if that's useful - didn't want to open one unsolicited without checking first, since I know #91 already covers the broader flat-file/output-path direction this project might be headed.