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/runtime-utils.ts

@@ -13,6 +13,7 @@ import type {
   RuntimeWorkspaceSummary,
 } from "./types";
 import { scanRuntimeModels } from "./api";
+import { DEFAULT_CTX_SIZE } from "./runtime-defaults";
 
 const DEFAULT_LOCAL_URL = "http://127.0.0.1:8080";
 
@@ -179,6 +180,10 @@ export function getRuntimeStateLabel(snapshot: RuntimeSnapshot): string {
     return "Remote API";
   }
 
+  if (snapshot.status === "ready" && !snapshot.ready) {
+    return snapshot.process_running ? "Not ready" : "Local API offline";
+  }
+
   switch (snapshot.status) {
     case "ready":
       return "Ready";
@@ -200,6 +205,10 @@ export function getRuntimeStatusTone(snapshot: RuntimeSnapshot): "neutral" | "su
     return "neutral";
   }
 
+  if (snapshot.status === "ready" && !snapshot.ready) {
+    return snapshot.process_running ? "danger" : "neutral";
+  }
+
   switch (snapshot.status) {
     case "ready":
       return "success";
@@ -299,7 +308,7 @@ export function createDefaultRuntimeSnapshot(): RuntimeSnapshot {
       models_dir: null,
       addr: "127.0.0.1:8080",
       gpu_layers: 0,
-      ctx_size: 4096,
+      ctx_size: DEFAULT_CTX_SIZE,
       extra_model_paths: [],
       selected_model_id: null,
       remote_presets: [],