chore(release): release v3.5.0

.github/workflows/auto-audit.yml

@@ -104,7 +104,7 @@ jobs:
           # failing the job (they require a manual semver-major update).
           npm audit || true
 
-      # ── Commit, push, PR to dev, then PR to main ──────────────────────────
+      # ── Commit, push, and open PR to dev ───────────────────────────────────
       - name: Commit fix and open PR to dev
         if: steps.audit.outputs.found == 'true' && steps.changes.outputs.has_changes == 'true'
         env:
@@ -118,7 +118,7 @@ jobs:
 
           git checkout -b "$BRANCH"
           git add package.json package-lock.json
-          git commit -m "fix(deps): auto npm audit fix ${DATE}"
+          git commit -s -m "fix(deps): auto npm audit fix ${DATE}"
           git push origin "$BRANCH"
 
           gh pr create \
@@ -135,32 +135,4 @@ jobs:
           - All checks passed: typecheck ✅  lint ✅  build ✅  tests ✅
 
           ### Next steps
-          This PR is set to auto-merge into \`dev\` once all required checks pass.
-          A follow-up PR from \`dev → main\` will be opened automatically after."
-
-          # Auto-merge into dev when all checks pass
-          gh pr merge "$BRANCH" --merge --auto
-
-      - name: Open PR from dev to main
-        if: steps.audit.outputs.found == 'true' && steps.changes.outputs.has_changes == 'true'
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: |
-          DATE=$(date +%Y%m%d)
-
-          # Wait for the dev merge to land before targeting main
-          sleep 30
-
-          gh pr create \
-            --base main \
-            --head dev \
-            --title "fix(deps): security audit fix (${DATE})" \
-            --body "## Security Audit Fix → main
-
-          Automatically opened after the audit fix was merged into \`dev\` and all CI checks passed.
-
-          See the dev PR for full details." \
-            || echo "::notice::PR dev→main already open or dev is already up to date with main"
-
-          # Auto-merge into main when all checks pass
-          gh pr merge dev --merge --auto || true
+          Please review and merge this PR into \`dev\` manually."

.github/workflows/ci.yml

@@ -5,6 +5,11 @@ on:
     branches: [main, dev]
   pull_request:
     branches: [main, dev]
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
 
 jobs:
   build:

.github/workflows/pr-check.yml

@@ -1,13 +1,14 @@
 name: PR Review
 
 on:
-  pull_request:
-    branches: [main, dev]
-    types: [opened, edited, synchronize, reopened]
   pull_request_target:
     branches: [main, dev]
     types: [opened, edited, synchronize, reopened]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 permissions:
   pull-requests: write
   contents: read

README.md

@@ -427,8 +427,17 @@ leetcode config --lang sql
 leetcode config --editor code
 leetcode config --workdir ~/leetcode
 leetcode config --repo https://github.com/username/leetcode-solutions.git
+
+# Pick a color theme for the TUI (dark, light, or auto)
+leetcode config --theme light
+leetcode config --theme dark
+leetcode config --theme auto
 ```
 
+The `--theme` setting is workspace-scoped. `auto` (the default) probes the
+terminal for its background color via OSC 11 and falls back to `COLORFGBG`,
+then to `dark`, if the terminal doesn't reply.
+
 ## Folder Structure
 
 Solution files are automatically organized by difficulty and category:

docs/commands.md

@@ -579,6 +579,7 @@ View or set configuration.
 - `-e, --editor <editor>` - Set editor command
 - `-w, --workdir <path>` - Set working directory for solutions
 - `-r, --repo [url]` - Set or clear Git repository URL
+- `-t, --theme <theme>` - Set TUI color theme (`dark`, `light`, or `auto`)
 - `-i, --interactive` - Interactive configuration mode
 
 **Examples**:
@@ -599,6 +600,12 @@ leetcode config --site leetcode.cn
 # Set editor
 leetcode config -e code
 leetcode config --editor vim
+leetcode config --editor zed
+
+# Set TUI color theme
+leetcode config --theme light
+leetcode config --theme dark
+leetcode config --theme auto
 
 # Set working directory
 leetcode config -w ~/leetcode
@@ -613,7 +620,7 @@ leetcode config -i
 leetcode config --interactive
 
 # Set multiple options
-leetcode config -l cpp -e code -w ~/leetcode
+leetcode config -l cpp -e code -w ~/leetcode --theme auto
 ```
 
 ---

docs/config.md

@@ -82,8 +82,17 @@ leetcode config --editor zed
 
 # Set Git repository
 leetcode config -r https://github.com/myuser/leetcode-solutions.git
+
+# Set TUI color theme (dark, light, or auto)
+leetcode config --theme light
+leetcode config --theme dark
+leetcode config --theme auto
 ```
 
+The `--theme` setting is workspace-scoped. `auto` (the default) probes the
+terminal for its background color via OSC 11 and falls back to `COLORFGBG`,
+then to `dark`, if the terminal doesn't reply.
+
 ## Settings
 
 Config is stored per-workspace in `~/.leetcode/workspaces/<name>/config.json`.
@@ -95,6 +104,7 @@ Config is stored per-workspace in `~/.leetcode/workspaces/<name>/config.json`.
 | `workDir`  | Directory where solution files are saved             |
 | `syncRepo` | Remote Git repository URL                            |
 | `site`     | LeetCode site (`leetcode.com` or `leetcode.cn`)      |
+| `theme`    | TUI color theme (`dark`, `light`, or `auto`)         |
 
 ## Workspace-Aware Storage
 

docs/releases.md

@@ -1,5 +1,46 @@
 # Release Notes
 
+## v3.5.0
+
+> **Release Date**: 2026-08-14
+> **Focus**: TUI Color Themes (Light/Dark/Auto) + LeetCode China Tag Null Fix + CI/CD Workflow Overhaul
+
+### 🚀 Features
+
+#### Color Theme Setting (`leetcode config --theme <dark|light|auto>`)
+
+Added workspace-scoped color theme support for the Terminal UI (TUI) with dark, light, and auto modes.
+
+- **Modes**:
+  - `auto` (default): Automatically detects terminal background color by querying the terminal via OSC 11, falling back to `COLORFGBG` or dark mode if the terminal does not respond within 100ms.
+  - `dark`: High-contrast dark theme palette tailored for dark terminals.
+  - `light`: Clean, readable light theme palette optimized for light terminal backgrounds.
+- Configurable via CLI flag: `leetcode config --theme <dark|light|auto>`
+- Configurable interactively in the TUI **Config** screen with immediate live palette hot-reloading on save.
+
+```bash
+# Pick a color theme for the TUI
+leetcode config --theme light
+leetcode config --theme dark
+leetcode config --theme auto
+```
+
+### 🐛 Bug Fixes
+
+#### LeetCode China Null Tag Validation ([#24](https://github.com/night-slayer18/leetcode-cli/issues/24))
+
+- Fixed an `API Response Validation Failed` error when running `show` or `pick` against `leetcode.cn` for problems containing tags without Chinese translations.
+- Updated `CnProblemDetailSchema`, `CnProblemListSchema`, and `CnDailyChallengeSchema` Zod definitions to treat `translatedName`, `nameTranslated`, and associated optional metadata as nullable.
+- Gracefully falls back to the English tag `name` when Chinese translations are `null`.
+
+### ⚙️ CI/CD & Maintenance
+
+- **Concurrency Controls**: Added concurrency groups with `cancel-in-progress` to PR review and CI workflows to cancel redundant runs on push updates.
+- **Manual CI Dispatch**: Added `workflow_dispatch` trigger to the main CI workflow.
+- **Security Audit Cleanup**: Removed auto-merge logic from security audit automation workflows.
+
+---
+
 ## v3.4.0
 
 > **Release Date**: 2026-07-29

docs/tui.md

@@ -69,6 +69,20 @@ Both screens use buffered editing:
 - `Esc`: cancel current edit or go back.
 - `Tab` / `h` / `l`: switch pane focus.
 
+## Color Themes
+
+The TUI supports dark and light themes, configured per workspace:
+
+- **`auto`** (default): Automatically detects terminal background color by querying via OSC 11, falling back to the `COLORFGBG` environment variable or dark theme if unresponded within 100ms.
+- **`dark`**: Classic dark palette with vibrant accents.
+- **`light`**: High-readability light theme tailored for light terminal backgrounds.
+
+Theme changes can be selected in the TUI **Config** screen (applies immediately on save) or via:
+
+```bash
+leetcode config --theme <dark|light|auto>
+```
+
 ## Terminal Cleanup Guarantees
 
 When leaving TUI (quit or opening external editor), the app restores terminal state:

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@night-slayer18/leetcode-cli",
-  "version": "3.4.0",
+  "version": "3.5.0",
   "description": "A modern LeetCode CLI built with TypeScript",
   "type": "module",
   "main": "dist/index.js",