fix(import): sanitize server names before the import filter check

[electrolobzik]

Problem

The two-step config-import flow in the Web UI (preview, then import the selected servers) silently imports zero servers when a server name needs sanitizing — e.g. a name containing a space like Figma Desktop:

{ "mcpServers": { "Figma Desktop": { "url": "http://127.0.0.1:3845/mcp" } } }

The preview says "Will import 1 server", but after clicking Import the UI shows a success toast reading "0 servers imported".

Root cause

Server names are validated against ^[a-zA-Z0-9_-]+$ and sanitized on import (Figma Desktop → Figma_Desktop). In configimport.Import:

1. The preview call (no server_names filter) sanitizes the name and surfaces Figma_Desktop to the client, which pre-selects it.
2. The import call sends server_names: ["Figma_Desktop"], but the filter check ran against the un-sanitized parsed name (Figma Desktop) before sanitization, so filterSet["Figma_Desktop"] never matched. The server was reported filtered_out and Summary.Imported came back 0.

Fix

Resolve the effective (sanitized) name before the filter, dedup, and found-server tracking. Match the filter against either the raw source name (the CLI --server flag passes it verbatim) or the sanitized name (the Web UI selects it from the preview), and track both names so the "requested server not found" warning stays correct on both paths. ImportedServer.OriginalName keeps pointing at the true source name so the httpapi rename map continues to resolve.

Test

Adds TestImport_FilterMatchesSanitizedName, which reproduces the two-step flow for a space-containing name and asserts the server is imported via both the Web UI (sanitized-name) and CLI (raw-name) filter paths, with no spurious not-found warning and OriginalName preserved.

Repro before the fix

Import the Figma config above through the UI → "0 servers imported" despite a green toast. After the fix it imports 1 server (quarantined, as expected).

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 55.00000% with 9 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
internal/configimport/import.go	55.00%	7 Missing and 2 partials ⚠️

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[mcpproxy-gatekeeper]

APPROVE — reviewed via Claude Code. Fixes 'import adds 0 servers': configimport now resolves effectiveName=SanitizeServerName(name) BEFORE the filter check and matches filter against raw OR sanitized name (Web UI sends sanitized, CLI sends raw). Strong new test covers both paths; edge cases (empty/unsanitizable/post-sanitize collision/slash) verified. go build + configimport/httpapi/cmd tests pass, vet+gofmt clean. One NON-BLOCKING finding flagged for follow-up: OriginalName now=raw widens a latent frontend rename-map key mismatch (narrow intersection, no test coverage either way) — follow-up issue filed, not a merge blocker.