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/WidgetAdapterSpecs/Edit.hs

@@ -4,6 +4,7 @@ import Web.Types
 import Generated.Types
 import IHP.Prelude
 import IHP.ViewPrelude
+import Web.Routes ()
 
 data EditView = EditView
     { spec       :: !WidgetAdapterSpec
@@ -14,7 +15,7 @@ data EditView = EditView
 instance View EditView where
     html EditView { .. } = [hsx|
         <div class="mb-4">
-            <a href={ShowWidgetAdapterSpecAction { widgetAdapterSpecId = spec.id }}
+            <a href={ShowWidgetAdapterSpecAction (spec.id)}
                class="text-sm text-gray-500 hover:text-gray-800">
                 ← {spec.name}
             </a>
@@ -63,7 +64,7 @@ renderForm spec = formFor spec [hsx|
 
         <div class="flex gap-3">
             {submitButton}
-            <a href={ShowWidgetAdapterSpecAction { widgetAdapterSpecId = spec.id }}
+            <a href={ShowWidgetAdapterSpecAction (spec.id)}
                class="text-sm text-gray-500 border border-gray-200 rounded px-4 py-2 hover:border-gray-400">
                 Cancel
             </a>

Web/View/WidgetAdapterSpecs/Index.hs

@@ -4,6 +4,7 @@ import Web.Types
 import Generated.Types
 import IHP.Prelude
 import IHP.ViewPrelude
+import Web.Routes ()
 import Application.Helper.View (adapterStatusBadge)
 
 data IndexView = IndexView
@@ -34,11 +35,12 @@ instance View IndexView where
                class="text-gray-500 hover:text-gray-800">Reporting Contracts ({length reportings})</a>
         </div>
 
-        {if null specs
-            then [hsx|<p class="text-sm text-gray-400">No adapter specs registered yet.</p>|]
-            else renderTable specs}
+        {if null specs then noSpecsMsg else renderTable specs}
     |]
 
+noSpecsMsg :: Html
+noSpecsMsg = [hsx|<p class="text-sm text-gray-400">No adapter specs registered yet.</p>|]
+
 renderTable :: [WidgetAdapterSpec] -> Html
 renderTable specs = [hsx|
     <div class="bg-white rounded-lg border border-gray-200 overflow-hidden">
@@ -63,7 +65,7 @@ renderRow :: WidgetAdapterSpec -> Html
 renderRow s = [hsx|
     <tr class="hover:bg-gray-50">
         <td class="px-4 py-3">
-            <a href={ShowWidgetAdapterSpecAction { widgetAdapterSpecId = s.id }}
+            <a href={ShowWidgetAdapterSpecAction (s.id)}
                class="font-medium text-indigo-600 hover:underline">{s.name}</a>
         </td>
         <td class="px-4 py-3">

Web/View/WidgetAdapterSpecs/New.hs

@@ -4,6 +4,7 @@ import Web.Types
 import Generated.Types
 import IHP.Prelude
 import IHP.ViewPrelude
+import Web.Routes ()
 
 data NewView = NewView
     { spec       :: !WidgetAdapterSpec
@@ -48,9 +49,7 @@ renderForm spec envelopes reportings = formFor spec [hsx|
             <label class="block text-sm font-medium text-gray-700 mb-1">Envelope Contract</label>
             <select name="envelopeContractId" class="w-full border border-gray-200 rounded px-3 py-2 text-sm">
                 <option value="">— None —</option>
-                {forEach envelopes (\e -> [hsx|
-                    <option value={tshow e.id}>v{e.contractVersion}</option>
-                |])}
+                {forEach envelopes renderEnvelopeOption}
             </select>
         </div>
 
@@ -58,9 +57,7 @@ renderForm spec envelopes reportings = formFor spec [hsx|
             <label class="block text-sm font-medium text-gray-700 mb-1">Reporting Contract</label>
             <select name="reportingContractId" class="w-full border border-gray-200 rounded px-3 py-2 text-sm">
                 <option value="">— None —</option>
-                {forEach reportings (\r -> [hsx|
-                    <option value={tshow r.id}>v{r.contractVersion}</option>
-                |])}
+                {forEach reportings renderReportingOption}
             </select>
         </div>
 
@@ -87,3 +84,9 @@ renderForm spec envelopes reportings = formFor spec [hsx|
         </div>
     </div>
 |]
+
+renderEnvelopeOption :: WidgetEnvelopeContract -> Html
+renderEnvelopeOption e = [hsx|<option value={tshow e.id}>v{e.contractVersion}</option>|]
+
+renderReportingOption :: WidgetReportingContract -> Html
+renderReportingOption r = [hsx|<option value={tshow r.id}>v{r.contractVersion}</option>|]

Web/View/WidgetAdapterSpecs/Show.hs

@@ -4,6 +4,7 @@ import Web.Types
 import Generated.Types
 import IHP.Prelude
 import IHP.ViewPrelude
+import Web.Routes ()
 import Application.Helper.View (adapterStatusBadge)
 
 data ShowView = ShowView
@@ -32,7 +33,7 @@ instance View ShowView where
                 </span>
                 {maturityBadge spec.maturity}
             </div>
-            <a href={EditWidgetAdapterSpecAction { widgetAdapterSpecId = spec.id }}
+            <a href={EditWidgetAdapterSpecAction (spec.id)}
                class="text-sm text-gray-500 border border-gray-200 rounded px-3 py-1 hover:border-gray-400">
                 Edit status / notes
             </a>
@@ -60,44 +61,49 @@ instance View ShowView where
             </div>
         </div>
 
-        {forEach (specNotes spec) (\n -> [hsx|
-            <div class="bg-gray-50 rounded-lg border border-gray-200 p-4 mb-4 text-sm text-gray-700">
-                <strong>Notes:</strong> {n}
-            </div>
-        |])}
+        {forEach (specNotes spec) renderSpecNote}
 
-        {if null widgets
-            then [hsx|<p class="text-sm text-gray-400 mt-6">No widgets assigned to this adapter spec.</p>|]
-            else [hsx|
-                <h2 class="text-lg font-semibold mb-3 mt-6">Assigned Widgets</h2>
-                <div class="bg-white rounded-lg border border-gray-200 overflow-hidden">
-                    <table class="w-full text-sm">
-                        <thead class="bg-gray-50 border-b border-gray-200">
-                            <tr>
-                                <th class="text-left px-4 py-3 font-medium text-gray-600">Name</th>
-                                <th class="text-left px-4 py-3 font-medium text-gray-600">Type</th>
-                                <th class="text-left px-4 py-3 font-medium text-gray-600">Status</th>
-                            </tr>
-                        </thead>
-                        <tbody class="divide-y divide-gray-100">
-                            {forEach widgets renderWidgetRow}
-                        </tbody>
-                    </table>
-                </div>
-            |]}
+        {renderWidgetsSection widgets}
     |]
 
+renderSpecNote :: Text -> Html
+renderSpecNote n = [hsx|
+    <div class="bg-gray-50 rounded-lg border border-gray-200 p-4 mb-4 text-sm text-gray-700">
+        <strong>Notes:</strong> {n}
+    </div>
+|]
+
+renderWidgetsSection :: [Widget] -> Html
+renderWidgetsSection [] = [hsx|<p class="text-sm text-gray-400 mt-6">No widgets assigned to this adapter spec.</p>|]
+renderWidgetsSection ws = [hsx|
+    <h2 class="text-lg font-semibold mb-3 mt-6">Assigned Widgets</h2>
+    <div class="bg-white rounded-lg border border-gray-200 overflow-hidden">
+        <table class="w-full text-sm">
+            <thead class="bg-gray-50 border-b border-gray-200">
+                <tr>
+                    <th class="text-left px-4 py-3 font-medium text-gray-600">Name</th>
+                    <th class="text-left px-4 py-3 font-medium text-gray-600">Type</th>
+                    <th class="text-left px-4 py-3 font-medium text-gray-600">Status</th>
+                </tr>
+            </thead>
+            <tbody class="divide-y divide-gray-100">
+                {forEach ws renderWidgetRow}
+            </tbody>
+        </table>
+    </div>
+|]
+
 renderEnvelopeLink :: Maybe EnvelopeEmissionContract -> Html
 renderEnvelopeLink Nothing  = [hsx|<span class="text-gray-400 text-sm">—</span>|]
 renderEnvelopeLink (Just c) = [hsx|
-    <a href={ShowEnvelopeEmissionContractAction { envelopeEmissionContractId = c.id }}
+    <a href={ShowEnvelopeEmissionContractAction (c.id)}
        class="font-mono text-indigo-600 hover:underline text-sm">v{c.contractVersion}</a>
 |]
 
 renderReportingLink :: Maybe InteractionReportingContract -> Html
 renderReportingLink Nothing  = [hsx|<span class="text-gray-400 text-sm">—</span>|]
 renderReportingLink (Just c) = [hsx|
-    <a href={ShowInteractionReportingContractAction { interactionReportingContractId = c.id }}
+    <a href={ShowInteractionReportingContractAction (c.id)}
        class="font-mono text-indigo-600 hover:underline text-sm">v{c.contractVersion}</a>
 |]
 
@@ -105,7 +111,7 @@ renderWidgetRow :: Widget -> Html
 renderWidgetRow w = [hsx|
     <tr class="hover:bg-gray-50">
         <td class="px-4 py-3">
-            <a href={ShowWidgetAction { widgetId = w.id }}
+            <a href={ShowWidgetAction (w.id)}
                class="text-indigo-600 hover:underline">{w.name}</a>
         </td>
         <td class="px-4 py-3 text-gray-500 text-xs">{w.widgetType}</td>