v0.2.0-llm: LLM integration, core utilities, and persistence

- Rust backend: LLM abstraction with OpenAI-compatible + Ollama API clients
- Tauri commands: generate, generate_stream, get/set LLM config
- LLM config: api_url, api_key, model, temperature, max_tokens, top_p
- Works with Ollama (localhost:11434), LM Studio, any OpenAI-compatible API
- Streaming infrastructure via Tauri Channels (LlmEvent)
- tauri-plugin-store, tauri-plugin-fs added
- Frontend: NPC Generator with race/class/alignment selection + AI generation
- Frontend: Dice Roller with notation parsing (2d6+3), presets, history
- Frontend: Session Logger with note-taking + AI summarization
- Frontend: Settings panel for LLM configuration (URL, key, model, temperature)
- App shell: left rail nav with active states, settings toggle
- All glassmorphism cards with gold glow hover states
- Builds clean: tsc, vite build, cargo check, tauri build

src-tauri/capabilities/default.json

@@ -6,6 +6,19 @@
   "permissions": [
     "core:default",
     "core:window:default",
-    "core:window:allow-set-title"
+    "core:window:allow-set-title",
+    "store:default",
+    "fs:default",
+    "fs:allow-read-text-file",
+    "fs:allow-write-text-file",
+    "fs:allow-read-file",
+    "fs:allow-write-file",
+    "fs:allow-exists",
+    "fs:allow-mkdir",
+    "fs:allow-remove",
+    "fs:allow-rename",
+    "fs:allow-read-dir",
+    "fs:allow-appdata-read-recursive",
+    "fs:allow-appdata-write-recursive"
   ]
 }