Add search and filtering to the Members page

[Lakes41]

Difficulty: Intermediate
Type: UI/UX

Background
The /members route lists members with wallet info, per the README's feature list ("Member management with wallet info"). As guilds grow, admins need a fast way to locate a specific member.

Problem
There is currently no way to search members by wallet address, username/handle, or filter by guild/pass status directly on the /members page — an admin has to scroll through the entire mock list.

Expected outcome
Admins can type into a search box to filter members by wallet address (partial match, case-insensitive) or display name, and can filter by guild and by active/expired pass status, with results updating without a full page reload.

Suggested implementation

• Add a debounced search input and filter dropdowns to the members page.
• Extend the members data-fetching layer to accept search, guildId, and status query params.
• Ensure wallet address matching handles common formatting differences (checksum casing) without leaking full addresses in ways that break existing masking/formatting conventions already used in the UI.
• Add an explicit "no results" empty state distinct from the loading state.

Acceptance criteria

• Search input filters the visible member list by wallet address or name.
• Guild and status filters can be combined with search.
• Filters are reflected in the URL query string.
• Empty/loading/error states are all handled distinctly.
• Tests cover: exact match, partial match, no match, and combined filters.

Likely affected files/directories
apps/dashboard/app/members/, apps/dashboard/lib/mock-data.ts, shared UI components for tables/filters.

[vreabernardo]

Working on this — debounced search over wallet/name, guild + pass-status filters, URL query sync, distinct empty/loading/error states, tests for exact/partial/no-match/combined. Will open a PR shortly.

[vreabernardo]

Update while working through the acceptance criteria: every one of them is already met on current main, landed by #267 (URL-synced member filters) plus the surrounding members work:

• Search by wallet or name, partial and case-insensitive: filterMembers in apps/dashboard/lib/pagination.ts lowercases both sides and matches name and wallet.
• Guild + status combined with search: guild scoping in the repository layer, status/role/search params in app/api/members/route.ts.
• Filters in the URL query string: updateFilterQuery in app/members/page.tsx syncs search/status/role/guild/page via router.replace.
• Distinct empty/loading/error states: listState drives the error banner, and EmptyState renders "No members match your filters" only for an empty result set.
• Tests for exact match, partial match, no match, combined filters: test/members.test.ts ("GET /api/members filters by exact wallet, partial name, no match, and combined filters") passes locally.

I verified each of these against the code and ran the members tests rather than opening a no-op PR. Unless there's a gap I'm missing, this looks safe to close.