fix(setup-wizard): address review — icon, CSS scope, E2E coverage

- Use a plain emoji glyph for the password visibility toggle instead
  of embedded SVG paths, matching the same pragmatic approach already
  used for the browser build's menu icons in this codebase.
- Scope the wider label width to the E2EE dialogue instead of
  changing it for every InputRow in every Svelte dialogue.
- Extend the existing CouchDB manual setup E2E workflow to assert the
  passphrase and Obfuscate Properties fields are hidden until
  encryption is enabled, then appear, and that the passphrase value
  survives toggling its visibility.

src/modules/services/LiveSyncUI/components/Password.svelte

@@ -41,37 +41,7 @@
     {disabled}
     onclick={() => (showPassword = !showPassword)}
 >
-    {#if showPassword}
-        <svg
-            viewBox="0 0 24 24"
-            width="16"
-            height="16"
-            fill="none"
-            stroke="currentColor"
-            stroke-width="2"
-            stroke-linecap="round"
-            stroke-linejoin="round"
-        >
-            <path d="M9.88 9.88a3 3 0 1 0 4.24 4.24" />
-            <path d="M10.73 5.08A10.43 10.43 0 0 1 12 5c7 0 10 7 10 7a13.16 13.16 0 0 1-1.67 2.68" />
-            <path d="M6.61 6.61A13.526 13.526 0 0 0 2 12s3 7 10 7a9.74 9.74 0 0 0 5.39-1.61" />
-            <line x1="2" x2="22" y1="2" y2="22" />
-        </svg>
-    {:else}
-        <svg
-            viewBox="0 0 24 24"
-            width="16"
-            height="16"
-            fill="none"
-            stroke="currentColor"
-            stroke-width="2"
-            stroke-linecap="round"
-            stroke-linejoin="round"
-        >
-            <path d="M2 12s3-7 10-7 10 7 10 7-3 7-10 7-10-7-10-7Z" />
-            <circle cx="12" cy="12" r="3" />
-        </svg>
-    {/if}
+    👁️
 </button>
 
 <style>
@@ -85,11 +55,10 @@
         background: transparent;
         border: none;
         box-shadow: none;
-        color: var(--text-muted);
+        line-height: 1;
         cursor: pointer;
     }
     .sls-password-toggle:hover {
-        color: var(--text-normal);
         background: var(--background-modifier-hover);
     }
 </style>