feat: apply trans-pride gradient theme across UI elements

- Add global CSS classes for trans gradient styling (btn-trans-gradient,
  input-trans-focus, icon-trans-hover)
- Update all primary action buttons to use trans gradient
- Add trans-pride glow effect to character panel based on state
- Update StatusBar icon buttons with trans gradient hover
- Update chat input focus border with trans gradient glow
- Update stop button to use trans gradient

src/lib/components/InputBar.svelte

@@ -811,8 +811,7 @@ User: ${formattedMessage}`;
         style="height: {textareaHeight}px; font-size: var(--terminal-font-size, 14px);"
         class="w-full px-4 py-3 bg-[var(--bg-secondary)] border border-[var(--border-color)]
              rounded-lg text-[var(--text-primary)] placeholder-gray-500 resize-none
-             focus:outline-none focus:border-[var(--accent-primary)] focus:ring-1 focus:ring-[var(--accent-primary)]
-             disabled:opacity-50 disabled:cursor-not-allowed"
+             input-trans-focus disabled:opacity-50 disabled:cursor-not-allowed"
       ></textarea>
     </div>
 
@@ -838,7 +837,7 @@ User: ${formattedMessage}`;
         <button
           type="button"
           onclick={handleInterrupt}
-          class="send-button bg-red-600 hover:bg-red-700"
+          class="send-button btn-trans-gradient"
           title="Interrupt the current response (Ctrl+C)"
         >
           <span class="font-bold">■</span> Stop
@@ -849,7 +848,7 @@ User: ${formattedMessage}`;
           disabled={!isConnected ||
             isSubmitting ||
             (!inputValue.trim() && attachments.length === 0)}
-          class="send-button bg-[var(--accent-primary)] hover:bg-[var(--accent-secondary)]
+          class="send-button trans-gradient-button
                disabled:opacity-50 disabled:cursor-not-allowed"
         >
           {#if isSubmitting}
@@ -1033,4 +1032,17 @@ User: ${formattedMessage}`;
   .send-button:active:not(:disabled) {
     transform: scale(0.95);
   }
+
+  .trans-gradient-button {
+    background: var(--trans-gradient-vibrant);
+    border: none;
+    color: #1a1a2e;
+    font-weight: 600;
+    text-shadow: 0 0 2px rgba(255, 255, 255, 0.5);
+  }
+
+  .trans-gradient-button:hover:not(:disabled) {
+    filter: brightness(1.1);
+    box-shadow: 0 0 20px rgba(91, 206, 250, 0.4), 0 0 30px rgba(245, 169, 184, 0.3);
+  }
 </style>