chore: prepare project for open source release

- Remove internal planning docs (CLAUDE.md, docs/, feature.md, livePlan.md) from git tracking
- Add .gitignore rules to prevent re-tracking internal files
- Add README.md (Chinese) and README.en.md (English) with screenshots, features, quick start
- Add LICENSE (MIT)
- Add CONTRIBUTING.md with dev setup, commit conventions, PR guide
- Add CHANGELOG.md for v1.0.0
- Add .github/ issue templates (bug report, feature request) and PR template
- Add public/ screenshots (p1-p6)

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,68 @@
+name: Bug 报告
+description: 报告一个 Bug
+labels: ["bug"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        感谢你提交 Bug 报告！请尽量填写完整信息，帮助我们更快定位问题。
+
+  - type: dropdown
+    id: platform
+    attributes:
+      label: 运行平台
+      options:
+        - Android（Dev Build）
+        - Android（Expo Go）
+        - iOS（Dev Build）
+        - iOS（Expo Go）
+        - Web
+    validations:
+      required: true
+
+  - type: dropdown
+    id: category
+    attributes:
+      label: 问题分类
+      options:
+        - 视频播放
+        - 直播
+        - 弹幕
+        - 登录 / 账号
+        - 下载
+        - UI / 界面
+        - 其他
+    validations:
+      required: true
+
+  - type: textarea
+    id: description
+    attributes:
+      label: 问题描述
+      placeholder: 请描述你遇到的问题...
+    validations:
+      required: true
+
+  - type: textarea
+    id: steps
+    attributes:
+      label: 复现步骤
+      placeholder: |
+        1. 打开 App
+        2. 点击 ...
+        3. 发现 ...
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected
+    attributes:
+      label: 期望行为
+      placeholder: 你期望发生什么？
+
+  - type: textarea
+    id: logs
+    attributes:
+      label: 错误日志 / 截图
+      description: 如有控制台报错或截图，请粘贴在此
+      render: shell