fix(WP-0014): pre-flight compilation fixes, Tailwind pipeline, and admin seed

A2 — Compilation fixes:
- Remove inline FK constraints from Schema.sql; IHP schema compiler cannot
  parse them. Add 1744329600-restore-fk-constraints.sql migration to restore
  referential integrity at the DB level.
- Rename `#label` → `#label_` throughout to avoid clash with Haskell built-in.
- Fix `hub.id == hid` UUID comparisons to use `toUUID hub.id`.
- Replace non-existent `setStatus`/`respondJson` calls with
  `renderJsonWithStatusCode` throughout Api controllers.
- Fix qualified package import for `cryptohash-sha256` in Auth.hs.
- Add `CanSelect (Text, Text)` instance in Helper.View.
- Refactor HSX inline lambdas to named helper functions in 100+ views
  (GHC cannot infer types for anonymous functions inside quasi-quoted HSX).
- Fix missing imports (IHP.QueryBuilder, IHP.Fetch, Web.Routes, Only, etc.)
  across helpers and controllers.
- Remove duplicate `diffUTCTime` definition in BottleneckDetector.
- Change `createEventForHub` return type from `IO ResponseReceived` to `IO ()`.
- Seed type-registry vocabulary via 1744502400-seed-type-registries.sql
  (moved from Schema.sql where IHP does not execute INSERT statements).

A3 — Tailwind build pipeline:
- Add `tailwindcss` to flake.nix native packages.
- Uncomment `tailwind.exec` process in devenv shell config.
- Add tailwind/tailwind.config.js (scans Web/View/**/*.hs).
- Add tailwind/app.css with @tailwind directives.

A4 — Admin user seed:
- Add 1744416000-seed-admin-user.sql: inserts admin@inter-hub.local
  with bcrypt-hashed password admin1234! (cost 10).
- Add .env.example documenting all required environment variables
  and default admin credentials.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Web/View/HubCapabilityManifests/New.hs

@@ -4,6 +4,7 @@ import Web.Types
 import Generated.Types
 import IHP.Prelude
 import IHP.ViewPrelude
+import Web.Routes ()
 
 data NewView = NewView
     { manifest :: !HubCapabilityManifest
@@ -23,33 +24,18 @@ instance View NewView where
             annotation categories, and policy scopes it owns. Create a draft, declare your types,
             then activate to register them with the framework.
         </div>
-        <form method="POST" action={CreateHubCapabilityManifestAction}>
-            <div class="bg-white rounded-lg border border-gray-200 p-6 max-w-lg space-y-4">
-                <div>
-                    <label class="block text-sm font-medium text-gray-700 mb-1">Hub</label>
-                    {selectField #hubId (hubOptions hubs)}
-                </div>
-                <div>
-                    <label class="block text-sm font-medium text-gray-700 mb-1">
-                        Capability Description <span class="text-gray-400 text-xs">(optional)</span>
-                    </label>
-                    {(textareaField #capabilityDescription) { fieldClass = "w-full border border-gray-300 rounded px-3 py-2 text-sm" }}
-                </div>
-                <div>
-                    <label class="block text-sm font-medium text-gray-700 mb-1">
-                        Contact <span class="text-gray-400 text-xs">(team or person)</span>
-                    </label>
-                    {(textField #contact) { fieldClass = "w-full border border-gray-300 rounded px-3 py-2 text-sm" }}
-                </div>
-                <div class="pt-2">
-                    <button type="submit"
-                            class="bg-indigo-600 text-white text-sm px-4 py-2 rounded hover:bg-indigo-700">
-                        Create Draft
-                    </button>
-                </div>
-            </div>
-        </form>
+        <div class="bg-white rounded-lg border border-gray-200 p-6 max-w-lg">
+            {renderManifestForm manifest hubs}
+        </div>
     |]
 
+renderManifestForm :: HubCapabilityManifest -> [Hub] -> Html
+renderManifestForm manifest hubs = formFor manifest [hsx|
+    {selectField #hubId (hubOptions hubs)}
+    {(textareaField #capabilityDescription) { fieldLabel = "Capability Description" }}
+    {(textField #contact) { fieldLabel = "Contact (team or person)" }}
+    {submitButton { label = "Create Draft" }}
+|]
+
 hubOptions :: [Hub] -> [(Text, Id Hub)]
 hubOptions hubs = map (\h -> (h.name <> " (" <> h.hubKind <> ")", h.id)) hubs