Put the Save name button beside the input, fit to its width

Matches the status 'Add' form immediately below it: renamed the
shared row layout from .status-list__new to .field-row (it now backs
both forms) and switched the project name form to it -- input grows,
button sits to its right sized to its own label instead of stretching
full width underneath. Dropped the visible 'Name' label in favour of
a placeholder + aria-label, mirroring the status form exactly.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

web/src/views/ProjectConfigureView.vue

@@ -198,23 +198,20 @@ onBeforeUnmount(() => window.removeEventListener('keydown', onKeydown))
       <section class="config-section">
         <h2>Project name</h2>
 
-        <form class="form" @submit.prevent="onRenameProject">
-          <label>
-            <span>Name</span>
-            <input v-model="nameDraft" type="text" maxlength="255" required />
-            <small v-if="renameError?.fieldError('title')" class="field-error">
-              {{ renameError.fieldError('title') }}
-            </small>
-          </label>
-
-          <p v-if="renameError && Object.keys(renameError.details).length === 0" class="form-error">
-            {{ renameError.message }}
-          </p>
-
+        <form class="field-row" @submit.prevent="onRenameProject">
+          <input
+            v-model="nameDraft"
+            type="text"
+            maxlength="255"
+            required
+            placeholder="Name"
+            aria-label="Project name"
+          />
           <button type="submit" :disabled="renaming || nameDraft.trim() === project.title">
             {{ renaming ? 'Saving…' : 'Save name' }}
           </button>
         </form>
+        <p v-if="renameError" class="form-error">{{ renameError.message }}</p>
       </section>
 
       <section class="config-section">
@@ -251,7 +248,7 @@ onBeforeUnmount(() => window.removeEventListener('keydown', onKeydown))
           </template>
         </draggable>
 
-        <form class="status-list__new" @submit.prevent="onAddStatus">
+        <form class="field-row" @submit.prevent="onAddStatus">
           <input
             v-model="newStatusName"
             type="text"