Projects: discovery, create, edit, manage linked resources (#12, #13, #14, #15)

hub.sr.ht's GraphQL now exposes the project write API (create/update/
link/unlink) and a public `projects` discovery query, so these
previously-blocked issues can be built.

ProjectService gains: fetchPublicProjects (#12); createProject (#13);
updateProject with ProjectInput (#14); link/unlink for sources, trackers,
and mailing lists plus linkable-resource candidate fetches (#15); and hub
cache invalidation after every mutation.

UI: a Discover browser and a create form reached from the projects list;
an Edit form and a Manage Resources sheet on project detail, gated to
projects the user owns. Mutations degrade to a visible error if a field
isn't live yet.

Built against the master schema; live deployment on sr.ht/query is not yet
confirmed (introspection there requires a token).

1 files changed, 39 insertions, 0 deletions

diff --git a/HutchTests/ProjectFormTests.swift b/HutchTests/ProjectFormTests.swift
new file mode 100644
index 0000000..a4b4dfa
--- /dev/null
+++ b/HutchTests/ProjectFormTests.swift
@@ -0,0 +1,39 @@
+import Foundation
+import Testing
+@testable import Hutch
+
+struct ProjectFormTests {
+    @Test
+    func parsesTagsSplittingAndTrimming() {
+        #expect(ProjectFormSheet.parseTags("swift, ios ,  ") == ["swift", "ios"])
+        #expect(ProjectFormSheet.parseTags("a,b,c") == ["a", "b", "c"])
+    }
+
+    @Test
+    func parseTagsDeduplicatesCaseInsensitively() {
+        #expect(ProjectFormSheet.parseTags("Swift, swift, SWIFT") == ["Swift"])
+    }
+
+    @Test
+    func parseTagsEmptyInputYieldsEmpty() {
+        #expect(ProjectFormSheet.parseTags("   ").isEmpty)
+        #expect(ProjectFormSheet.parseTags("").isEmpty)
+    }
+
+    @Test
+    func linkableResourceDisplayNameCombinesOwnerAndName() {
+        let resource = LinkableResource(rid: "r1", name: "hutch", ownerCanonicalName: "~alice", kind: .source)
+        #expect(resource.displayName == "~alice/hutch")
+        #expect(resource.id == "r1")
+    }
+
+    @Test
+    func discoveredProjectIDMatchesProject() {
+        let project = Project(
+            metadata: .init(id: "p1", name: "Hutch", description: nil, website: nil, visibility: .publicVisibility, tags: [], updated: .now),
+            resources: .init(mailingLists: [], sources: [], trackers: [], isFullyLoaded: false)
+        )
+        let discovered = DiscoveredProject(project: project, ownerCanonicalName: "~alice")
+        #expect(discovered.id == "p1")
+    }
+}