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/Show.hs

@@ -4,6 +4,7 @@ import Web.Types
 import Generated.Types
 import IHP.Prelude
 import IHP.ViewPrelude
+import Web.Routes ()
 import Data.Aeson (Value(..), encode)
 import qualified Data.Vector as V
 import qualified Data.ByteString.Lazy.Char8 as BL
@@ -26,30 +27,7 @@ instance View ShowView where
             {statusBadge manifest.status}
         </div>
 
-        {if manifest.status == "draft"
-            then [hsx|
-                <div class="mb-4 flex gap-2">
-                    <a href={EditHubCapabilityManifestAction { hubCapabilityManifestId = manifest.id }}
-                       class="text-sm border border-indigo-300 text-indigo-700 px-3 py-1.5 rounded hover:bg-indigo-50">
-                        Edit Draft
-                    </a>
-                    <a href={ActivateManifestAction { hubCapabilityManifestId = manifest.id }}
-                       class="text-sm bg-green-600 text-white px-3 py-1.5 rounded hover:bg-green-700">
-                        Activate
-                    </a>
-                </div>
-            |]
-            else if manifest.status == "active"
-            then [hsx|
-                <div class="mb-4">
-                    <a href={RetireManifestAction { hubCapabilityManifestId = manifest.id }}
-                       data-confirm="Retire this manifest? The hub's types will remain registered."
-                       class="text-sm border border-gray-300 text-gray-600 px-3 py-1.5 rounded hover:bg-gray-50">
-                        Retire
-                    </a>
-                </div>
-            |]
-            else [hsx||]}
+        {manifestActions manifest}
 
         <div class="grid grid-cols-2 gap-4 mb-6">
             <div class="bg-white rounded-lg border border-gray-200 p-4">
@@ -62,12 +40,8 @@ instance View ShowView where
             </div>
         </div>
 
-        {forEach (maybeText manifest.capabilityDescription) (\d -> [hsx|
-            <p class="text-sm text-gray-600 mb-4">{d}</p>
-        |])}
-        {forEach (maybeText manifest.contact) (\c -> [hsx|
-            <p class="text-xs text-gray-400 mb-6">Contact: {c}</p>
-        |])}
+        {forEach (maybeText manifest.capabilityDescription) renderCapabilityDesc}
+        {forEach (maybeText manifest.contact) renderContactLine}
 
         <div class="grid grid-cols-2 gap-4">
             {jsonArraySection "Declared Widget Types" manifest.declaredWidgetTypes}
@@ -77,6 +51,37 @@ instance View ShowView where
         </div>
     |]
 
+manifestActions :: HubCapabilityManifest -> Html
+manifestActions manifest
+    | manifest.status == "draft" = [hsx|
+        <div class="mb-4 flex gap-2">
+            <a href={EditHubCapabilityManifestAction (manifest.id)}
+               class="text-sm border border-indigo-300 text-indigo-700 px-3 py-1.5 rounded hover:bg-indigo-50">
+                Edit Draft
+            </a>
+            <a href={ActivateManifestAction (manifest.id)}
+               class="text-sm bg-green-600 text-white px-3 py-1.5 rounded hover:bg-green-700">
+                Activate
+            </a>
+        </div>
+    |]
+    | manifest.status == "active" = [hsx|
+        <div class="mb-4">
+            <a href={RetireManifestAction (manifest.id)}
+               data-confirm="Retire this manifest? The hub's types will remain registered."
+               class="text-sm border border-gray-300 text-gray-600 px-3 py-1.5 rounded hover:bg-gray-50">
+                Retire
+            </a>
+        </div>
+    |]
+    | otherwise = mempty
+
+renderCapabilityDesc :: Text -> Html
+renderCapabilityDesc d = [hsx|<p class="text-sm text-gray-600 mb-4">{d}</p>|]
+
+renderContactLine :: Text -> Html
+renderContactLine c = [hsx|<p class="text-xs text-gray-400 mb-6">Contact: {c}</p>|]
+
 jsonArraySection :: Text -> Value -> Html
 jsonArraySection title val = [hsx|
     <div class="bg-white rounded-lg border border-gray-200 p-4">