rename: the apps say Inkwell — web, desktop, Android and server strings

ThoughtSync is renamed Inkwell ("Fabled Inkwell" in full; Scribe note 5071).
This is step 1 of milestone 481: every string a person reads in the running
apps. Identities installed clients depend on are deliberately untouched — the
Tauri productName (it derives the .deb Package: field), identifier and binary
name, applicationId, X-ThoughtSync-* headers, the export's app marker, env vars,
module and crate names.

- web: title, PWA manifest (name "Fabled Inkwell", short_name "Inkwell"),
  offline page, icon labels, build labels, prompts, notification title
- server: site_name default, import error, link-preview User-Agent
- 0030: a stored site_name of exactly the old default follows the rename. The
  Settings page saves every key, so most servers hold "ThoughtSync" without an
  admin ever having chosen it; a name they typed is left alone
- desktop: window title, default device name, local-mode site name, log line
- android: app_name and the strings that name the app
- core: probe and compatibility messages

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

frontend/src/views/SyncView.vue

@@ -69,8 +69,8 @@ function describe(c: Compatibility): string {
 }
 
 // --- App updates (M10.9). Independent of sync: an unlinked, server-less install
-// still updates itself, which is why the feed is the release host and not a
-// ThoughtSync server. ---
+// still updates itself, which is why the feed is the release host and not an
+// Inkwell server. ---
 const channel = ref<UpdateChannel>("stable");
 const update = ref<UpdateStatus | null>(null);
 const checking = ref(false);
@@ -374,8 +374,8 @@ onMounted(refresh);
           Working offline on this device
         </p>
         <p class="mt-1 text-sm text-neutral-500 dark:text-neutral-400">
-          Everything works without a server — your notes are stored on this machine. Connect a
-          ThoughtSync server if you want them to reach your other devices.
+          Everything works without a server — your notes are stored on this machine. Connect an
+          Inkwell server if you want them to reach your other devices.
         </p>
       </section>
 
@@ -410,7 +410,7 @@ onMounted(refresh);
           "
         >
           <p class="font-medium text-neutral-800 dark:text-neutral-100">
-            {{ probe.server.site_name || "ThoughtSync server" }}
+            {{ probe.server.site_name || "Inkwell server" }}
             <span v-if="probe.server.version" class="text-xs font-normal text-neutral-400">
               v{{ probe.server.version }}
             </span>