feat: add bitrate visualization with file analysis

Add comprehensive bitrate data extraction and visualization capabilities:
- Implement analyze_files command for file candidacy detection
- Add extract_bitrate_data command using ffprobe
- Create BitrateData, BitrateFrame, File, and FileCandidacy types with TS bindings
- Update App to fetch and display bitrate data from dropped files
- Refactor DropOverlay to use new file analysis system
- Configure Graph component for packet size visualization
- Simplify drag-drop flow to trigger on drop event only

src/bindings.ts

@@ -3,7 +3,11 @@ import type { StreamResult } from "@/bindings/StreamResult";
 import type { StreamDetail } from "@/bindings/StreamDetail";
 import type { StreamResultError } from "@/bindings/StreamResultError";
 import type { MediaType } from "@/bindings/MediaType";
-export type { StreamResult, StreamDetail, StreamResultError, MediaType };
+import type { File } from "@/bindings/File";
+import type { FileCandidacy } from "@/bindings/FileCandidacy";
+import type { BitrateData } from "@/bindings/BitrateData";
+import type { BitrateFrame } from "@/bindings/BitrateFrame";
+export type { StreamResult, StreamDetail, StreamResultError, MediaType, File, FileCandidacy, BitrateData, BitrateFrame };
 
 // Tauri invoke wrapper
 import { invoke } from "@tauri-apps/api/core";
@@ -21,5 +25,13 @@ export const commands = {
       if (e instanceof Error) throw e;
       else return { status: "error", error: e as any };
     }
+  },
+  
+  async analyzeFiles(paths: string[]): Promise<File[]> {
+    return await invoke<File[]>("analyze_files", { paths });
+  },
+
+  async extractBitrateData(path: string): Promise<BitrateData> {
+    return await invoke<BitrateData>("extract_bitrate_data", { path });
   }
 };