Initial release — APIClient - Agent v2.0.0

AI-first API testing desktop client built with Python + PyQt6.

Features:
- Multi-tab HTTP request editor with params/headers/body/auth/tests
- KeyValueTable with per-row enable/disable checkboxes and 36px rows
- Format JSON button, syntax highlighting, pre-request & test scripts
- Collections, environments, history, import/export (Postman v2.1, cURL)
- OpenAPI 3.x / Swagger 2.0 local parser (no AI tokens)
- EKIKA Odoo API Framework generator — JSON-API, REST JSON, GraphQL,
  Custom REST JSON with all auth types (instant, no AI tokens)
- Persistent AI chat sidebar (Claude-powered co-pilot) with streaming,
  context-aware suggestions, and one-click Apply to request editor
- AI collection generator from any docs URL or pasted spec
- WebSocket client, Mock server, Collection runner, Code generator
- Dark/light theme engine (global QSS, object-name selectors)
- SSL error detection with actionable hints
- MIT License

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/ui/tabs_manager.py

@@ -0,0 +1,97 @@
+"""APIClient - Agent — Multi-tab request manager."""
+from PyQt6.QtWidgets import QWidget, QVBoxLayout, QTabWidget, QPushButton, QTabBar
+from PyQt6.QtCore import pyqtSignal, Qt
+
+from app.ui.request_panel import RequestPanel
+from app.models import HttpRequest
+
+
+class RequestTab(QWidget):
+    send_requested = pyqtSignal(object)
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        layout = QVBoxLayout(self)
+        layout.setContentsMargins(0, 0, 0, 0)
+        layout.setSpacing(0)
+        self.request_panel = RequestPanel()
+        self.request_panel.send_requested.connect(self.send_requested)
+        layout.addWidget(self.request_panel)
+
+    def load_request(self, req: HttpRequest):
+        self.request_panel.load_request(req)
+
+    def get_request(self) -> HttpRequest:
+        return self.request_panel.get_request()
+
+
+class TabsManager(QWidget):
+    send_requested      = pyqtSignal(object)
+    current_tab_changed = pyqtSignal()
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        layout = QVBoxLayout(self)
+        layout.setContentsMargins(0, 0, 0, 0)
+        layout.setSpacing(0)
+
+        self.tab_widget = QTabWidget()
+        self.tab_widget.setTabsClosable(False)   # we manage close buttons ourselves
+        self.tab_widget.setMovable(True)
+        self.tab_widget.currentChanged.connect(lambda _: self.current_tab_changed.emit())
+
+        # "+" new tab button in the corner
+        new_btn = QPushButton("+")
+        new_btn.setObjectName("ghost")
+        new_btn.setFixedSize(28, 28)
+        new_btn.setToolTip("New Tab  (Ctrl+T)")
+        new_btn.clicked.connect(lambda: self.new_tab())
+        self.tab_widget.setCornerWidget(new_btn, Qt.Corner.TopRightCorner)
+
+        layout.addWidget(self.tab_widget)
+        self._tab_counter = 0
+        self.new_tab()
+
+    # ── Public API ────────────────────────────────────────────────────────────
+
+    def new_tab(self, req: HttpRequest = None) -> RequestTab:
+        tab = RequestTab()
+        tab.send_requested.connect(self.send_requested)
+        if req:
+            tab.load_request(req)
+        self._tab_counter += 1
+        label = req.name if (req and req.name) else f"Request {self._tab_counter}"
+        idx = self.tab_widget.addTab(tab, label)
+        self.tab_widget.setCurrentIndex(idx)
+        self._add_close_button(idx, tab)
+        return tab
+
+    def _add_close_button(self, idx: int, tab: RequestTab):
+        btn = QPushButton("×")
+        btn.setObjectName("tabCloseBtn")
+        btn.setFixedSize(18, 18)
+        btn.setToolTip("Close Tab")
+        btn.clicked.connect(lambda: self._close_tab(self.tab_widget.indexOf(tab)))
+        self.tab_widget.tabBar().setTabButton(idx, QTabBar.ButtonPosition.RightSide, btn)
+
+    def close_current_tab(self):
+        self._close_tab(self.tab_widget.currentIndex())
+
+    def _close_tab(self, index: int):
+        if self.tab_widget.count() > 1:
+            self.tab_widget.removeTab(index)
+
+    def current_tab(self) -> RequestTab | None:
+        w = self.tab_widget.currentWidget()
+        return w if isinstance(w, RequestTab) else None
+
+    def load_request_in_new_tab(self, req: HttpRequest):
+        self.new_tab(req)
+
+    def load_request_in_current_tab(self, req: HttpRequest):
+        tab = self.current_tab()
+        if tab:
+            tab.load_request(req)
+
+    def rename_current_tab(self, name: str):
+        self.tab_widget.setTabText(self.tab_widget.currentIndex(), name)