Add comma-separated and regex pattern support for set filtering

[Copilot]

Set name filtering currently only supports exact single set matches. Users need to filter across multiple sets or use patterns like "ACF Fall" (all years) or "ACF [FWR]" (Fall/Winter/Regionals).

Changes

API layer (routes/api/query.js)

• Split setName parameter by commas, trim whitespace

Database layer (database/qbreader/get-query.js)

• Treat all set name inputs as case-insensitive regex patterns
• Single pattern: direct $regex match on set.name
• Multiple patterns: $or array within $and for proper composition with existing filters

UI (client/db/index.jsx)

• Updated placeholder: "Set Name (supports regex, commas)"

Examples

// Single partial match
setName: "ACF Fall" 
// → matches "2023 ACF Fall", "2024 ACF Fall", etc.

// Multiple sets
setName: "2023 ACF Fall, 2024 PACE NSC"
// → matches either set

// Regex pattern
setName: "ACF [FWR]"
// → matches ACF Fall, ACF Winter, ACF Regionals

MongoDB Query Structure

// Multiple patterns with existing filters
{
  difficulty: { $in: [5] },
  category: { $in: ['Science'] },
  $and: [
    { $or: [
      { 'set.name': { $regex: '2023 ACF Fall', $options: 'i' } },
      { 'set.name': { $regex: '2024 PACE NSC', $options: 'i' } }
    ]}
  ]
}

Scope

Only affects /api/query endpoint used by database search page. Other endpoints (packet retrieval, user stats) continue using exact matching.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• qbreader2.z35tynb.mongodb.net
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/website/website/node_modules/.bin/mocha (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Use commas or regex to filter for sets</issue_title>
<issue_description>A user could enter 2023 ACF Fall, 2024 PACE NSC to filter for both sets, ACF Fall to get all ACF sets, or ACF [FWR] to get ACF Fall/Winter/Regionals. Potential fix for #293, #394. This should work on anywhere where the user can input a set name</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Use commas or regex to filter for sets #403

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