feat: add SettingsPage with HuggingFace model search and fix flexbox layout

- Add SettingsPage component with macOS/Linear-style settings UI (sp-* classes)
- Fix HuggingFace results list squeeze: sp-card-row--full now has align-items: stretch
  overriding the inherited flex-start, ensuring children fill 100% horizontal width
- Fix sp-hf-file row layout: width 100%, grid columns for name/quant/size/download
- Fix sp-hf-name truncation: explicit overflow/ellipsis/white-space in CSS
- Add white-space: nowrap to sp-hf-size and sp-hf-quant-badge to protect secondary columns
- Add runtime-deps crate, Tailwind/PostCSS config, runtime-defaults, MessageBubble test
- Update Cargo workspace, inference-server, tauri runtime types and process handling

tauri-app/src/features/runtime/components/RuntimeStatusCard.css

@@ -28,6 +28,11 @@
   gap: 10px;
 }
 
+.runtime-card-header-left {
+  min-width: 0;
+  flex: 1;
+}
+
 .runtime-card-kicker {
   font-size: 10px;
   font-weight: 700;
@@ -42,6 +47,25 @@
   font-weight: 700;
   letter-spacing: -0.02em;
   color: var(--text);
+  display: flex;
+  align-items: center;
+  gap: 7px;
+}
+
+/* Pulsing green dot when runtime is running */
+.runtime-status-dot {
+  display: inline-block;
+  width: 8px;
+  height: 8px;
+  border-radius: 50%;
+  background: #30d158;
+  flex-shrink: 0;
+  animation: runtime-pulse 2s ease-in-out infinite;
+}
+
+@keyframes runtime-pulse {
+  0%, 100% { box-shadow: 0 0 0 0 rgba(48, 209, 88, 0.5); }
+  50%       { box-shadow: 0 0 0 5px rgba(48, 209, 88, 0); }
 }
 
 .runtime-card-mode {
@@ -92,6 +116,13 @@
   padding: 7px 10px;
 }
 
+.runtime-card-meta-model {
+  max-width: 160px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
 .runtime-card-note {
   display: block;
   margin-top: 10px;
@@ -177,12 +208,63 @@
   border-color: var(--accent);
 }
 
-.runtime-card-btn-primary {
+/* Start — green */
+.runtime-card-btn-start {
+  color: #fff;
+  border-color: rgba(48, 209, 88, 0.5);
+  background: linear-gradient(135deg, #1ea84d, #30d158);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 6px;
+}
+
+.runtime-card-btn-start:hover:not(:disabled) {
+  background: linear-gradient(135deg, #25c05a, #3fe068);
+}
+
+/* Stop — red */
+.runtime-card-btn-stop {
+  color: #fff;
+  border-color: rgba(240, 64, 64, 0.5);
+  background: linear-gradient(135deg, #c0302e, #f04040);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 6px;
+}
+
+.runtime-card-btn-stop:hover:not(:disabled) {
+  background: linear-gradient(135deg, #d03838, #f55555);
+}
+
+/* Setup — blue (same as primary) */
+.runtime-card-btn-setup {
   color: #fff;
   border-color: rgba(72, 166, 255, 0.6);
   background: linear-gradient(135deg, #2b88e6, #46c2ff);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 6px;
 }
 
-.runtime-card-btn-primary:hover:not(:disabled) {
+.runtime-card-btn-setup:hover:not(:disabled) {
   background: linear-gradient(135deg, #3193f5, #55cbff);
 }
+
+/* Spinner for in-progress lifecycle */
+.runtime-btn-spinner {
+  display: inline-block;
+  width: 11px;
+  height: 11px;
+  border: 2px solid rgba(255, 255, 255, 0.35);
+  border-top-color: #fff;
+  border-radius: 50%;
+  animation: runtime-spin 0.7s linear infinite;
+  flex-shrink: 0;
+}
+
+@keyframes runtime-spin {
+  to { transform: rotate(360deg); }
+}