no-em-dash pre-commit hook for user-facing strings, existing em-dashes rewritten

frontend/scripts/no-em-dash.ts walks src/ with the TypeScript parser and flags
an em-dash in JSX text, string literals and template text. A bare "—"
placeholder passes, separators go in no-em-dash.allow.json. The script is
identical to index's copy.

frontend/src/routes/_layout/alerts.tsx

@@ -125,7 +125,7 @@ function ThisBrowser() {
   if (!webpush.supported()) {
     return (
       <p className="text-sm text-muted-foreground">
-        This browser cannot receive notifications. They need HTTPS — over plain
+        This browser cannot receive notifications. They need HTTPS. Over plain
         http on a local address, no browser will allow them.
       </p>
     )
@@ -215,7 +215,7 @@ function AlertsForm({ initial }: { initial: AlertsConfig }) {
           <span className="text-sm text-muted-foreground">
             {draft.enabled
               ? "Failures reach the channels below."
-              : "Switched off — failures only reach the log."}
+              : "Switched off. Failures only reach the log."}
           </span>
         </div>
         <Switch
@@ -313,7 +313,7 @@ function AlertsForm({ initial }: { initial: AlertsConfig }) {
                     disabled={dirty || test.isPending}
                     title={
                       dirty
-                        ? "Save first — the engine sends through the stored channel"
+                        ? "Save first. The engine sends through the stored channel"
                         : "Send one alert through this channel"
                     }
                     data-testid="test-channel"

frontend/src/routes/_layout/modules.tsx

@@ -147,8 +147,8 @@ function Modules() {
             className="text-sm text-muted-foreground"
             data-testid="modules-adopted"
           >
-            Adopted — this is the environment Fluksio itself is installed in.
-            Add a package the way you added the rest:{" "}
+            Adopted. This is the environment Fluksio itself is installed in. Add
+            a package the way you added the rest:{" "}
             <span className="font-mono">pip install …</span>, then sync or
             restart so the workers pick it up. For a venv the engine owns
             instead, set <span className="font-mono">NODE_VENV=managed</span>.

frontend/src/routes/_layout/workers.tsx

@@ -117,12 +117,12 @@ function Machines() {
             {String(provisioner.name)} can start{" "}
             {(provisioner.profiles as string[]).join(", ")}
             {outstanding.length > 0
-              ? ` — asked for ${outstanding
+              ? `. Asked for ${outstanding
                   .map((job) => `${job.profile} (job ${job.job})`)
                   .join(", ")}`
               : ""}
             {provisioner.last_error
-              ? ` — last failed: ${String(provisioner.last_error)}`
+              ? `. Last failed: ${String(provisioner.last_error)}`
               : ""}
           </p>
         )
@@ -269,7 +269,7 @@ function Flavors() {
             <span className="font-mono text-xs text-muted-foreground">
               {flavor.cpus} cpu · {Math.round((flavor.ram ?? 0) / 1024)} GB
               {flavor.gpus ? ` · ${flavor.gpus} gpu` : ""}
-              {flavor.description ? ` — ${flavor.description}` : ""}
+              {flavor.description ? ` · ${flavor.description}` : ""}
             </span>
           </span>
           {mayEdit ? (