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/Widgets/Edit.hs

@@ -4,6 +4,7 @@ import Web.Types
 import Generated.Types
 import IHP.Prelude
 import IHP.ViewPrelude
+import Web.Routes ()
 import Web.View.Widgets.New (renderForm)
 
 data EditView = EditView
@@ -20,7 +21,7 @@ instance View EditView where
             <div class="flex items-center gap-2 text-sm text-gray-500 mb-4">
                 <a href={WidgetsAction} class="hover:text-gray-700">Widgets</a>
                 <span>/</span>
-                <a href={ShowWidgetAction { widgetId = widget.id }} class="hover:text-gray-700">{widget.name}</a>
+                <a href={ShowWidgetAction (widget.id)} class="hover:text-gray-700">{widget.name}</a>
                 <span>/</span>
                 <span>Edit</span>
             </div>

Web/View/Widgets/Index.hs

@@ -4,6 +4,7 @@ import Web.Types
 import Generated.Types
 import IHP.Prelude
 import IHP.ViewPrelude
+import Web.Routes ()
 
 data IndexView = IndexView
     { widgets :: ![Widget]
@@ -42,7 +43,7 @@ renderWidget :: [Hub] -> Widget -> Html
 renderWidget hubs w = [hsx|
     <tr class="border-b border-gray-100 hover:bg-gray-50">
         <td class="px-4 py-3">
-            <a href={ShowWidgetAction { widgetId = w.id }}
+            <a href={ShowWidgetAction (w.id)}
                class="font-medium text-indigo-600 hover:text-indigo-800">
                 {w.name}
             </a>
@@ -56,7 +57,7 @@ renderWidget hubs w = [hsx|
         </td>
         <td class="px-4 py-3 text-gray-500 text-xs">v{show w.version}</td>
         <td class="px-4 py-3 text-right">
-            <a href={EditWidgetAction { widgetId = w.id }}
+            <a href={EditWidgetAction (w.id)}
                class="text-gray-500 hover:text-gray-700 text-xs">Edit</a>
         </td>
     </tr>

Web/View/Widgets/New.hs

@@ -4,6 +4,7 @@ import Web.Types
 import Generated.Types
 import IHP.Prelude
 import IHP.ViewPrelude
+import Web.Routes ()
 
 data NewView = NewView
     { widget       :: !Widget
@@ -34,22 +35,23 @@ renderForm widget hubs adapterSpecs widgetTypes policyScopes = formFor widget [h
         <label class="ihp-form-label">Adapter Spec (optional — leave blank for native IHP widget)</label>
         <select name="adapterSpecId" class="ihp-form-field">
             <option value="">— Native IHP widget —</option>
-            {forEach adapterSpecs (\s -> [hsx|
-                <option value={tshow s.id}>{s.name} ({s.framework} v{s.version})</option>
-            |])}
+            {forEach adapterSpecs renderAdapterOption}
         </select>
     </div>
     {submitButton}
 |]
 
+renderAdapterOption :: WidgetAdapterSpec -> Html
+renderAdapterOption s = [hsx|<option value={tshow s.id}>{s.name} ({s.framework} v{s.version})</option>|]
+
 hubOptions :: [Hub] -> [(Text, Id Hub)]
 hubOptions hubs = map (\h -> (h.name, h.id)) hubs
 
 widgetTypeOptions :: [WidgetTypeRegistry] -> [(Text, Text)]
-widgetTypeOptions = map (\r -> (r.label, r.name))
+widgetTypeOptions = map (\r -> (r.label_, r.name))
 
 policyScopeOptions :: [PolicyScopeRegistry] -> [(Text, Text)]
-policyScopeOptions = map (\r -> (r.label, r.name))
+policyScopeOptions = map (\r -> (r.label_, r.name))
 
 statusOptions :: [(Text, Text)]
 statusOptions =

Web/View/Widgets/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 (widgetEnvelope)
 
 data ShowView = ShowView
@@ -23,28 +24,14 @@ instance View ShowView where
         <div class="mb-2 flex items-center gap-2 text-sm text-gray-500">
             <a href={HubsAction} class="hover:text-gray-700">Hubs</a>
             <span>/</span>
-            <a href={ShowHubAction { hubId = hub.id }} class="hover:text-gray-700">{hub.name}</a>
+            <a href={ShowHubAction (hub.id)} class="hover:text-gray-700">{hub.name}</a>
             <span>/</span>
             <span>{widget.name}</span>
         </div>
 
-        {if cycleCount >= 2 then [hsx|
-        <div class="mb-2 flex items-center gap-2 bg-yellow-50 border border-yellow-200 rounded-lg px-4 py-2">
-            <span class="text-yellow-700 font-semibold text-sm">⟳ {show cycleCount} cycles</span>
-            <span class="text-yellow-600 text-xs">
-                Recurring friction — this widget has been through {show cycleCount} improvement cycles.
-            </span>
-        </div>
-        |] else mempty}
+        {renderCycleBanner cycleCount}
 
-        {if isRegressed then [hsx|
-        <div class="mb-4 flex items-center gap-2 bg-red-50 border border-red-200 rounded-lg px-4 py-3">
-            <span class="text-red-600 font-semibold text-sm">⚠ Regression detected</span>
-            <span class="text-red-500 text-xs">
-                This widget had an improved signal but has since received high/critical annotations.
-            </span>
-        </div>
-        |] else mempty}
+        {if isRegressed then renderRegressionBanner else mempty}
 
         {widgetEnvelope widget [hsx|
             <div class="flex items-center justify-between mb-4">
@@ -58,7 +45,7 @@ instance View ShowView where
                         {renderAdapterBadge mAdapterSpec}
                     </p>
                 </div>
-                <a href={EditWidgetAction { widgetId = widget.id }}
+                <a href={EditWidgetAction (widget.id)}
                    class="text-sm border border-gray-300 px-3 py-1.5 rounded hover:bg-gray-50">
                     Edit
                 </a>
@@ -85,19 +72,13 @@ instance View ShowView where
                 <div class="flex items-center justify-between mb-3">
                     <h2 class="text-lg font-medium">Annotations</h2>
                     <div class="flex items-center gap-2">
-                        {if length annotations >= 3 then [hsx|
-                            <form method="POST" action={DraftRequirementAction { widgetId = widget.id }} class="inline">
-                                <button type="submit" class="text-xs border border-indigo-300 text-indigo-700 px-2 py-1 rounded hover:bg-indigo-50">
-                                    Draft Requirement
-                                </button>
-                            </form>
-                        |] else mempty}
-                        <form method="POST" action={SummarizeClusterAction { widgetId = widget.id }} class="inline">
+                        {if length annotations >= 3 then renderDraftRequirementForm widget.id else mempty}
+                        <form method="POST" action={SummarizeClusterAction (widget.id)} class="inline">
                             <button type="submit" class="text-xs border border-blue-300 text-blue-700 px-2 py-1 rounded hover:bg-blue-50">
                                 Summarize Feedback
                             </button>
                         </form>
-                        <a href={NewAnnotationAction { widgetId = widget.id }}
+                        <a href={NewAnnotationAction (widget.id)}
                            class="text-sm text-indigo-600 hover:text-indigo-800">+ Add</a>
                     </div>
                 </div>
@@ -132,14 +113,7 @@ instance View ShowView where
             </div>
         </section>
 
-        {if null recentSignals then mempty else [hsx|
-        <section class="mb-8">
-            <h2 class="text-lg font-medium mb-3">Recent Outcome Signals</h2>
-            <div class="bg-white rounded-lg border border-gray-200 divide-y divide-gray-100">
-                {forEach recentSignals renderSignalRow}
-            </div>
-        </section>
-        |]}
+        {renderSignalsSection recentSignals}
 
         <section>
             <h2 class="text-lg font-medium mb-3">Version History</h2>
@@ -213,7 +187,7 @@ renderSignalRow sig = [hsx|
         <span class={signalTypeClass sig.signalType <> " text-xs px-2 py-0.5 rounded font-medium"}>
             {sig.signalType}
         </span>
-        {maybe mempty (\v -> [hsx|<span class="font-mono text-gray-700">{show v}</span>|]) sig.value}
+        {maybe mempty renderSignalValue sig.value}
         <span class="text-xs text-gray-400 ml-auto">{show sig.observedAt}</span>
     </div>
 |]
@@ -225,10 +199,54 @@ signalTypeClass "neutral"      = "bg-gray-100 text-gray-600"
 signalTypeClass "inconclusive" = "bg-yellow-100 text-yellow-800"
 signalTypeClass _              = "bg-gray-100 text-gray-600"
 
+renderCycleBanner :: Int -> Html
+renderCycleBanner n | n >= 2 = [hsx|
+    <div class="mb-2 flex items-center gap-2 bg-yellow-50 border border-yellow-200 rounded-lg px-4 py-2">
+        <span class="text-yellow-700 font-semibold text-sm">⟳ {show n} cycles</span>
+        <span class="text-yellow-600 text-xs">
+            Recurring friction — this widget has been through {show n} improvement cycles.
+        </span>
+    </div>
+|]
+renderCycleBanner _ = mempty
+
+renderRegressionBanner :: Html
+renderRegressionBanner = [hsx|
+    <div class="mb-4 flex items-center gap-2 bg-red-50 border border-red-200 rounded-lg px-4 py-3">
+        <span class="text-red-600 font-semibold text-sm">⚠ Regression detected</span>
+        <span class="text-red-500 text-xs">
+            This widget had an improved signal but has since received high/critical annotations.
+        </span>
+    </div>
+|]
+
+renderDraftRequirementForm :: Id Widget -> Html
+renderDraftRequirementForm wid = [hsx|
+    <form method="POST" action={DraftRequirementAction (wid)} class="inline">
+        <button type="submit" class="text-xs border border-indigo-300 text-indigo-700 px-2 py-1 rounded hover:bg-indigo-50">
+            Draft Requirement
+        </button>
+    </form>
+|]
+
+renderSignalsSection :: [OutcomeSignal] -> Html
+renderSignalsSection [] = mempty
+renderSignalsSection sigs = [hsx|
+    <section class="mb-8">
+        <h2 class="text-lg font-medium mb-3">Recent Outcome Signals</h2>
+        <div class="bg-white rounded-lg border border-gray-200 divide-y divide-gray-100">
+            {forEach sigs renderSignalRow}
+        </div>
+    </section>
+|]
+
+renderSignalValue :: Double -> Html
+renderSignalValue v = [hsx|<span class="font-mono text-gray-700">{show v}</span>|]
+
 renderAdapterBadge :: Maybe WidgetAdapterSpec -> Html
 renderAdapterBadge Nothing = mempty
 renderAdapterBadge (Just s) = [hsx|
-    <a href={ShowWidgetAdapterSpecAction { widgetAdapterSpecId = s.id }}
+    <a href={ShowWidgetAdapterSpecAction (s.id)}
        class="ml-2 text-xs bg-purple-100 text-purple-700 px-1.5 py-0.5 rounded hover:bg-purple-200">
         adapter: {s.name}
     </a>