Refactor main application entry and enhance UI with file browser integration

- Changed application entry point to use QApplication for better compatibility with widgets.
- Set up QML UI style to support custom button backgrounds.
- Introduced LocalSettingsModel and FileBrowser for managing application settings and file selection.
- Updated QML components to reflect new data models and improve layout consistency.
- Enhanced Theme.qml with detailed comments and improved color management for better readability.

ISC/Tabs/SelectFileDialog.qml

@@ -41,7 +41,8 @@ Dialog {
     }
 
     function applyMetadataFromEditor() {
-        if (metadataEditRow < 0) return;
+        if (metadataEditRow < 0)
+            return;
         const rec = tableModel[metadataEditRow];
         if (!rec) {
             metadataEditDialog.close();
@@ -76,9 +77,7 @@ Dialog {
 
         background: Rectangle {
             radius: Theme.radiusSm
-            color: dialogButton.down    ? Theme.buttonNeutralPressed
+            color: dialogButton.down ? Theme.buttonNeutralPressed : dialogButton.hovered ? Theme.buttonNeutralHover : Theme.buttonNeutralBackground
-                 : dialogButton.hovered ? Theme.buttonNeutralHover
-                                        : Theme.buttonNeutralBackground
             border.width: Theme.borderThin
             border.color: Theme.fieldBorder
         }
@@ -236,8 +235,17 @@ Dialog {
 
             columnWidthProvider: function (col) {
                 // [select, wafer, date, chamber, notes, file (variable), edit, save]
-                const fixed = { 0: 40, 1: 90, 2: 170, 3: 120, 4: 180, 6: 56, 7: 56 };
+                const fixed = {
-                if (fixed.hasOwnProperty(col)) return fixed[col];
+                    0: 40,
+                    1: 90,
+                    2: 170,
+                    3: 120,
+                    4: 180,
+                    6: 56,
+                    7: 56
+                };
+                if (fixed.hasOwnProperty(col))
+                    return fixed[col];
                 // col 5 (File) takes remaining width
                 const w = Math.max(400, tableView.width);
                 const used = 40 + 90 + 170 + 120 + 180 + 56 + 56;
@@ -245,14 +253,30 @@ Dialog {
             }
 
             model: TableModel {
-                TableModelColumn { display: "select"   }
+                TableModelColumn {
-                TableModelColumn { display: "wafer"    }
+                    display: "select"
-                TableModelColumn { display: "date"     }
+                }
-                TableModelColumn { display: "chamber"  }
+                TableModelColumn {
-                TableModelColumn { display: "notes"    }
+                    display: "wafer"
-                TableModelColumn { display: "fileName" }
+                }
-                TableModelColumn { display: "edit"     }
+                TableModelColumn {
-                TableModelColumn { display: "save"     }
+                    display: "date"
+                }
+                TableModelColumn {
+                    display: "chamber"
+                }
+                TableModelColumn {
+                    display: "notes"
+                }
+                TableModelColumn {
+                    display: "fileName"
+                }
+                TableModelColumn {
+                    display: "edit"
+                }
+                TableModelColumn {
+                    display: "save"
+                }
                 rows: root.normalizedRows
             }
 
@@ -265,8 +289,10 @@ Dialog {
                 border.color: Theme.softBorder
                 border.width: Theme.borderThin
                 color: {
-                    if (root.selectedRow === row)         return Theme.sideActiveBackground;
+                    if (root.selectedRow === row)
-                    if (root.tableModel[row]?.highlight)  return Theme.subtleSectionBackground;
+                        return Theme.sideActiveBackground;
+                    if (root.tableModel[row]?.highlight)
+                        return Theme.subtleSectionBackground;
                     return row % 2 === 0 ? Theme.cardBackground : Theme.tone100;
                 }
 
@@ -297,9 +323,7 @@ Dialog {
 
                         background: Rectangle {
                             radius: Theme.radiusXs
-                            color: parent.down    ? Theme.buttonNeutralPressed
+                            color: parent.down ? Theme.buttonNeutralPressed : parent.hovered ? Theme.buttonNeutralHover : Theme.buttonNeutralBackground
-                                 : parent.hovered ? Theme.buttonNeutralHover
-                                                  : Theme.buttonNeutralBackground
                             border.width: Theme.borderThin
                             border.color: Theme.fieldBorder
                         }
@@ -325,15 +349,14 @@ Dialog {
                         font.pixelSize: 12
                         onClicked: {
                             const record = root.tableModel[row];
-                            if (!record) return;
+                            if (!record)
+                                return;
                             file_browser.saveMetadata(record.fileName ?? "", record.wafer ?? "", record.date ?? "", record.chamber ?? "", record.notes ?? "", record.selected ?? false);
                         }
 
                         background: Rectangle {
                             radius: Theme.radiusXs
-                            color: parent.down    ? Theme.buttonNeutralPressed
+                            color: parent.down ? Theme.buttonNeutralPressed : parent.hovered ? Theme.buttonNeutralHover : Theme.buttonNeutralBackground
-                                 : parent.hovered ? Theme.buttonNeutralHover
-                                                  : Theme.buttonNeutralBackground
                             border.width: Theme.borderThin
                             border.color: Theme.fieldBorder
                         }
@@ -359,9 +382,12 @@ Dialog {
                         verticalAlignment: Text.AlignVCenter
                         text: {
                             const record = root.tableModel[row] || {};
-                            if (column === 1) return record.wafer    ?? "";
+                            if (column === 1)
-                            if (column === 2) return record.date     ?? "";
+                                return record.wafer ?? "";
-                            if (column === 5) return record.fileName ?? "";
+                            if (column === 2)
+                                return record.date ?? "";
+                            if (column === 5)
+                                return record.fileName ?? "";
                             return "";
                         }
                         elide: Text.ElideRight
@@ -381,7 +407,8 @@ Dialog {
                         verticalAlignment: Text.AlignVCenter
                         text: {
                             const record = root.tableModel[row] || {};
-                            if (column === 3) return record.chamber ?? "";
+                            if (column === 3)
+                                return record.chamber ?? "";
                             return record.notes ?? "";
                         }
                         elide: Text.ElideRight
@@ -496,7 +523,11 @@ Dialog {
             anchors.fill: parent
             spacing: Theme.settingsGridSpacing
 
-            Label { text: qsTr("File"); font.bold: true; color: Theme.headingColor }
+            Label {
+                text: qsTr("File")
+                font.bold: true
+                color: Theme.headingColor
+            }
 
             Text {
                 id: filePathLabel
@@ -509,17 +540,45 @@ Dialog {
                 font.pixelSize: 12
             }
 
-            Label { text: qsTr("Wafer");   color: Theme.headingColor }
+            Label {
-            DialogTextInput { id: waferField;   Layout.fillWidth: true; Layout.preferredHeight: 36 }
+                text: qsTr("Wafer")
+                color: Theme.headingColor
+            }
+            DialogTextInput {
+                id: waferField
+                Layout.fillWidth: true
+                Layout.preferredHeight: 36
+            }
 
-            Label { text: qsTr("Date");    color: Theme.headingColor }
+            Label {
-            DialogTextInput { id: dateField;    Layout.fillWidth: true; Layout.preferredHeight: 36 }
+                text: qsTr("Date")
+                color: Theme.headingColor
+            }
+            DialogTextInput {
+                id: dateField
+                Layout.fillWidth: true
+                Layout.preferredHeight: 36
+            }
 
-            Label { text: qsTr("Chamber"); color: Theme.headingColor }
+            Label {
-            DialogTextInput { id: chamberField; Layout.fillWidth: true; Layout.preferredHeight: 36 }
+                text: qsTr("Chamber")
+                color: Theme.headingColor
+            }
+            DialogTextInput {
+                id: chamberField
+                Layout.fillWidth: true
+                Layout.preferredHeight: 36
+            }
 
-            Label { text: qsTr("Notes");   color: Theme.headingColor }
+            Label {
-            DialogTextInput { id: notesField;   Layout.fillWidth: true; Layout.preferredHeight: 36 }
+                text: qsTr("Notes")
+                color: Theme.headingColor
+            }
+            DialogTextInput {
+                id: notesField
+                Layout.fillWidth: true
+                Layout.preferredHeight: 36
+            }
 
             CheckBox {
                 id: selectedField
@@ -531,7 +590,9 @@ Dialog {
                 Layout.topMargin: 8
                 spacing: 8
 
-                Item { Layout.fillWidth: true }
+                Item {
+                    Layout.fillWidth: true
+                }
 
                 DialogActionButton {
                     text: qsTr("Cancel")

ISC/Tabs/SettingsTab.qml

@@ -419,7 +419,9 @@ Item {
                 opacity: (settingsScroll.ScrollBar.vertical.position <= 0 && settingsScroll.contentHeight > settingsScroll.height) ? (scrollHintTimer.running ? 1 : 0) : 0
 
                 Behavior on opacity {
-                    NumberAnimation { duration: 400 }
+                    NumberAnimation {
+                        duration: 400
+                    }
                 }
             }
         }
@@ -432,5 +434,4 @@ Item {
         repeat: false
         onTriggered: scrollHint.visible = false
     }
-
 }

ISC/Theme.qml

@@ -2,44 +2,120 @@ pragma Singleton
 
 import QtQuick
 
-// ===== Shared Theme Tokens =====
+// =============================================================================
+//  Theme — single source of truth for colors and sizing
+// =============================================================================
+//  Sections:
+//    1.  Mode flag
+//    2.  Tone palette          (raw tones; everything else derives from these)
+//    3.  Surfaces              (page / card / panel / workspace backgrounds)
+//    4.  Borders
+//    5.  Text                  (headings, body, panel titles)
+//    6.  Controls              (fields, buttons, checkbox)
+//    7.  Tracks                (pill toggle + scrollbar)
+//    8.  Tabs                  (footer tab bar)
+//    9.  Side rail
+//   10.  Status                (success / warning / error)
+//   11.  Geometry              (radius / border width / spacing / sizing)
+// =============================================================================
+
 QtObject {
-    // ===== Theme Mode =====
+    // ── 1. Mode ──────────────────────────────────────────────────────────────
-    // Toggle this to preview the same shell in light mode.
+    property bool isDarkMode: false
-    property bool isDarkMode: true
 
-    // ===== Surface Colors =====
+    // ── 2. Tone palette (base values; consume via semantic tokens below) ─────
-    // Core application surfaces.
+    readonly property color tone100: isDarkMode ? "#111111" : "#FAFAFA"
-    readonly property color pageBackground: isDarkMode ? "#11161c" : "#eef4f7"
+    readonly property color tone200: isDarkMode ? "#1A1A1A" : "#F2F2F2"
-    readonly property color cardBackground: isDarkMode ? "#1b232d" : "#ffffff"
+    readonly property color tone300: isDarkMode ? "#242424" : "#E8E8E8"
-    readonly property color workspaceBackground: isDarkMode ? "#121923" : "#ffffff"
+    readonly property color toneText: isDarkMode ? "#F2F2F2" : "#111111"
-    readonly property color sideRailBackground: isDarkMode ? "#18202a" : "#f5f7fa"
+    readonly property color toneMute: isDarkMode ? "#A8A8A8" : "#8A8A8A"
-    readonly property color responseBackground: isDarkMode ? "#18212a" : "#f9fbfc"
+    readonly property color toneBorder: isDarkMode ? "#2B2B2B" : "#D8D8D8"
 
-    // Shared border and text colors.
+    // ── 3. Surfaces ──────────────────────────────────────────────────────────
-    readonly property color cardBorder: isDarkMode ? "#334155" : "#cbd5e1"
+    readonly property color pageBackground: tone100
-    readonly property color workspaceBorder: isDarkMode ? "#334155" : "#d7dde5"
+    readonly property color cardBackground: tone200
-    readonly property color responseBorder: isDarkMode ? "#334155" : "#d5e0e8"
+    readonly property color panelBackground: tone200
+    readonly property color workspaceBackground: tone200
+    readonly property color responseBackground: tone200
+    readonly property color subtleSectionBackground: tone300
 
-    readonly property color headingColor: isDarkMode ? "#e5eef7" : "#12324a"
+    // ── 4. Borders ───────────────────────────────────────────────────────────
-    readonly property color bodyColor: isDarkMode ? "#afbdca" : "#415a6b"
+    readonly property color cardBorder: toneBorder
-    readonly property color buttonPressed: isDarkMode ? "#214d60" : "#17576c"
+    readonly property color responseBorder: toneBorder
-    readonly property color statusSuccessColor: isDarkMode ? "#7cd67e" : "#1f7a33"
+    readonly property color workspaceBorder: toneBorder
-    readonly property color statusErrorColor: isDarkMode ? "#ff8a80" : "#c62828"
+    readonly property color innerFrameBorder: toneBorder
-    readonly property color statusWarningColor: isDarkMode ? "#f3c677" : "#9a6700"
+    readonly property color outerFrameBorder: isDarkMode ? "#343434" : "#CECECE"
+    readonly property color softBorder: isDarkMode ? "#222222" : "#E2E2E2"
 
-    // ===== Side Rail Sizing =====
+    // ── 5. Text ──────────────────────────────────────────────────────────────
+    readonly property color headingColor: toneText
+    readonly property color bodyColor: toneMute
+    readonly property color panelTitleText: toneMute
+
+    // ── 6. Controls ──────────────────────────────────────────────────────────
+    // Fields
+    readonly property color fieldBackground: tone100
+    readonly property color fieldText: toneText
+    readonly property color fieldPlaceholder: toneMute
+    readonly property color fieldBorder: toneBorder
+    readonly property color fieldBorderFocus: toneText
+    // Neutral buttons
+    readonly property color buttonNeutralBackground: tone300
+    readonly property color buttonNeutralHover: isDarkMode ? "#303030" : "#DDDDDD"
+    readonly property color buttonNeutralPressed: tone100
+    readonly property color buttonNeutralText: toneText
+    readonly property color buttonPressed: tone300
+    readonly property color primaryAccent: toneText
+    // Checkbox
+    readonly property color checkboxText: toneText
+
+    // ── 7. Tracks (pill toggle, scrollbar thumb) ─────────────────────────────
+    readonly property color trackBackground: isDarkMode ? "#25252B" : "#D1D5DB"
+
+    // ── 8. Tabs (footer tab bar) ─────────────────────────────────────────────
+    readonly property color tabBarBackground: tone200
+    readonly property color tabBackground: "transparent"
+    readonly property color tabActiveBackground: "transparent"
+    readonly property color tabHoverBackground: tone300
+    readonly property color tabBorder: "transparent"
+    readonly property color tabText: toneMute
+    readonly property color tabActiveText: toneText
+
+    // ── 9. Side rail ─────────────────────────────────────────────────────────
+    readonly property color sideRailBackground: tone200
+    readonly property color sideActiveBackground: tone300
+
+    // ── 10. Status ───────────────────────────────────────────────────────────
+    readonly property color statusSuccessColor: isDarkMode ? "#63D471" : "#2E9E44"
+    readonly property color statusWarningColor: isDarkMode ? "#F5C15C" : "#C88A18"
+    readonly property color statusErrorColor: isDarkMode ? "#FF6B6B" : "#D64545"
+
+    // ── 11. Geometry ─────────────────────────────────────────────────────────
+    // Radius
+    readonly property int radiusXs: 4   // fields, tight elements
+    readonly property int radiusSm: 6   // buttons
+    readonly property int radiusMd: 10  // cards, group boxes
+    readonly property int radiusLg: 14  // large panels / dialogs
+    // Border width
+    readonly property int borderThin: 1
+    readonly property int borderStrong: 2
+    // Main panel layout
+    readonly property int mainAreaPadding: 10
+    readonly property int rightPaneGap: 6
+    readonly property int panelPadding: 12
+    // Side rail layout
     readonly property int sideRailWidth: 190
     readonly property int sideRailSpacing: 14
     readonly property int sideButtonHeight: 146
     readonly property int sideButtonMinHeight: 88
-    readonly property int panelPadding: 12
+    // Tab bar layout
-
-    // ===== Main Panel Spacing =====
-    // Main content spacing.
-    readonly property int mainAreaPadding: 10
-    readonly property int rightPaneGap: 6
     readonly property int tabBarHeight: 34
+    readonly property int tabBarPadding: 6
+    readonly property int tabSpacing: 2
+    readonly property int tabRadius: 2
+    readonly property int tabFontSize: 12
+    readonly property int tabButtonMinWidth: 80
+    // Settings page layout
     readonly property int settingsPanelMaxWidth: 760
     readonly property int settingsOuterMargin: 40
     readonly property int settingsSectionSpacing: 20
@@ -48,28 +124,4 @@ QtObject {
     readonly property int settingsButtonHeight: 40
     readonly property int settingsActionWidth: 200
     readonly property int settingsFieldMinWidth: 160
-
-    // ===== Footer Tab Theme =====
-    // Bottom tab styling.
-    readonly property color tabBarBackground: isDarkMode ? "#161d26" : "#f2f2f2"
-    readonly property color tabBackground: isDarkMode ? "#202833" : "#ececec"
-    readonly property color tabActiveBackground: isDarkMode ? "#2a3440" : "#ffffff"
-    readonly property color tabHoverBackground: isDarkMode ? "#263140" : "#f7f7f7"
-    readonly property color tabBorder: isDarkMode ? "#3a4758" : "#cfcfcf"
-    readonly property color tabText: isDarkMode ? "#c6d0da" : "#222222"
-    readonly property color tabActiveText: isDarkMode ? "#ffffff" : "#111111"
-
-    readonly property int tabButtonMinWidth: 80
-    readonly property int tabHorizontalPadding: 14
-    readonly property int tabBarPadding: 6
-    readonly property int tabSpacing: 2
-    readonly property int tabRadius: 2
-    readonly property int tabFontSize: 12
-
-    // ===== Form Control Theme =====
-    readonly property color inputBackground: isDarkMode ? "#202833" : "#ffffff"
-    readonly property color inputBorder: isDarkMode ? "#4a596d" : "#cfcfcf"
-    readonly property color buttonBackground: isDarkMode ? "#202833" : "#ffffff"
-    readonly property color buttonText: isDarkMode ? "#e5eef7" : "#111111"
-    readonly property color checkboxText: isDarkMode ? "#d6dfeb" : "#111111"
 }

backend/file_browser.py

@@ -0,0 +1,230 @@
+from __future__ import annotations
+
+import json
+import re
+from datetime import datetime
+from pathlib import Path
+
+from PySide6.QtCore import QObject, Property, QStandardPaths, Signal, Slot
+from PySide6.QtWidgets import QFileDialog, QMessageBox
+
+from backend.csv_file_metadata import CSVFileMetadata
+from backend.zwafer_parser import ZWaferParser
+
+
+# ===== File Browser Model =====
+class FileBrowser(QObject):
+    # ===== Change Signals =====
+    filesChanged = Signal()
+    currentDirectoryChanged = Signal()
+
+    # ===== Lifecycle =====
+    def __init__(self, parent: QObject | None = None) -> None:
+        super().__init__(parent)
+        self._parser = ZWaferParser()
+        self._files: list[dict[str, object]] = []
+        self._current_directory = self._resolve_default_directory()
+        self._refresh_files(show_empty_message=False)
+
+    # ===== Exposed Properties =====
+    @Property("QVariantList", notify=filesChanged)
+    def files(self) -> list[dict[str, object]]:
+        return [dict(row) for row in self._files]
+
+    @Property(str, notify=currentDirectoryChanged)
+    def currentDirectory(self) -> str:
+        return str(self._current_directory)
+
+    # ===== Directory Selection =====
+    @Slot()
+    def chooseDirectory(self) -> None:
+        selected_dir = QFileDialog.getExistingDirectory(
+            None,
+            "Select CSV Folder",
+            self.currentDirectory,
+        )
+        if not selected_dir:
+            return
+
+        self._set_current_directory(Path(selected_dir))
+        self._refresh_files(show_empty_message=True)
+
+    @Slot()
+    def refreshFiles(self) -> None:
+        self._refresh_files(show_empty_message=False)
+
+    # ===== Metadata Persistence =====
+    @Slot(str, str, str, str, str, bool)
+    def saveMetadata(
+        self,
+        file_path: str,
+        wafer: str,
+        date: str,
+        chamber: str,
+        notes: str,
+        selected: bool,
+    ) -> None:
+        csv_path = Path(file_path)
+        if not csv_path.exists():
+            self._show_error(f"CSV file was not found:\n{file_path}")
+            return
+
+        row = self._find_row(file_path)
+        if row is None:
+            self._show_error("The selected CSV row is no longer available.")
+            return
+
+        row["wafer"] = wafer
+        row["date"] = date
+        row["chamber"] = chamber
+        row["notes"] = notes
+        row["selected"] = selected
+
+        payload = {
+            "wafer": wafer,
+            "date": date,
+            "chamber": chamber,
+            "notes": notes,
+        }
+
+        try:
+            sidecar_path = self._sidecar_path(csv_path)
+            sidecar_path.write_text(json.dumps(payload, indent=4), encoding="utf-8")
+        except Exception as exc:  # pragma: no cover - defensive UI path
+            self._show_error(f"Failed to save metadata:\n{exc}")
+            return
+
+        self.filesChanged.emit()
+        self._show_info(f"Saved metadata for:\n{csv_path.name}")
+
+    # ===== Internal Data Loading =====
+    def _refresh_files(self, show_empty_message: bool) -> None:
+        selected_state = {
+            str(row.get("fileName", "")): bool(row.get("selected", False))
+            for row in self._files
+        }
+
+        self._files = []
+
+        if not self._current_directory.exists():
+            self.filesChanged.emit()
+            return
+
+        for csv_path in sorted(self._current_directory.glob("*.csv")):
+            try:
+                metadata = self._load_metadata(csv_path)
+                self._files.append(
+                    {
+                        "selected": selected_state.get(str(csv_path), False),
+                        "wafer": metadata.wafer,
+                        "date": metadata.string_date_format(),
+                        "chamber": metadata.chamber,
+                        "notes": metadata.notes,
+                        "fileName": str(csv_path),
+                        "highlight": metadata.get_wafer_type() in {"A", "B", "C"},
+                    }
+                )
+            except Exception:
+                self._files.append(
+                    {
+                        "selected": selected_state.get(str(csv_path), False),
+                        "wafer": csv_path.stem,
+                        "date": "",
+                        "chamber": "",
+                        "notes": "Unable to parse metadata",
+                        "fileName": str(csv_path),
+                        "highlight": False,
+                    }
+                )
+
+        self.filesChanged.emit()
+
+        if show_empty_message and not self._files:
+            self._show_info("No CSV files were found in the selected folder.")
+
+    def _load_metadata(self, csv_path: Path) -> CSVFileMetadata:
+        sidecar_path = self._sidecar_path(csv_path)
+        if sidecar_path.exists():
+            try:
+                payload = json.loads(sidecar_path.read_text(encoding="utf-8"))
+                return CSVFileMetadata(
+                    wafer=str(payload.get("wafer", "")),
+                    date=str(payload.get("date", "")),
+                    chamber=str(payload.get("chamber", "")),
+                    notes=str(payload.get("notes", "")),
+                    filename=str(csv_path),
+                )
+            except Exception:
+                # Fall back to CSV/header parsing if sidecar is malformed.
+                pass
+
+        parser_data, _ = self._parser.parse(str(csv_path))
+        if parser_data is not None:
+            wafer = parser_data.serial or ""
+            date_text = ""
+            if parser_data.date != datetime.min:
+                date_text = CSVFileMetadata.format_date(parser_data.date)
+            return CSVFileMetadata(
+                wafer=wafer,
+                date=date_text,
+                chamber="",
+                notes="",
+                filename=str(csv_path),
+            )
+
+        return self._metadata_from_filename(csv_path)
+
+    def _metadata_from_filename(self, csv_path: Path) -> CSVFileMetadata:
+        match = re.match(
+            r"^(?P<wafer>[^-]+)-(?P<date>\d{8})(?:_(?P<run>\d+))?$",
+            csv_path.stem,
+        )
+        if not match:
+            return CSVFileMetadata(filename=str(csv_path))
+
+        date_text = ""
+        try:
+            parsed = datetime.strptime(match.group("date"), "%Y%m%d")
+            date_text = CSVFileMetadata.format_date(parsed)
+        except ValueError:
+            date_text = ""
+
+        return CSVFileMetadata(
+            wafer=match.group("wafer"),
+            date=date_text,
+            filename=str(csv_path),
+        )
+
+    # ===== Internal Helpers =====
+    def _resolve_default_directory(self) -> Path:
+        documents_dir = QStandardPaths.writableLocation(
+            QStandardPaths.DocumentsLocation
+        )
+        base_dir = Path(documents_dir) if documents_dir else (Path.home() / "Documents")
+        return base_dir / "isc_data"
+
+    def _set_current_directory(self, directory: Path) -> None:
+        normalized = Path(directory)
+        if normalized == self._current_directory:
+            return
+        self._current_directory = normalized
+        self.currentDirectoryChanged.emit()
+
+    def _find_row(self, file_path: str) -> dict[str, object] | None:
+        for row in self._files:
+            if str(row.get("fileName", "")) == file_path:
+                return row
+        return None
+
+    def _sidecar_path(self, csv_path: Path) -> Path:
+        return csv_path.with_suffix(f"{csv_path.suffix}.json")
+
+    def _show_error(self, message: str) -> None:
+        QMessageBox.critical(None, "iSenseCloud", message)
+
+    def _show_info(self, message: str) -> None:
+        QMessageBox.information(None, "iSenseCloud", message)
+
+
+# Backward-compatible alias while the QML dialog is still named SelectFileDialog.
+SelectFileDialogModel = FileBrowser

main.py

@@ -1,16 +1,36 @@
 import sys
 from pathlib import Path
 
-from PySide6.QtGui import QGuiApplication
 from PySide6.QtQml import QQmlApplicationEngine
+from PySide6.QtQuickControls2 import QQuickStyle
+from PySide6.QtWidgets import QApplication
 
+from backend.local_settings_model import LocalSettingsModel
+from backend.file_browser import FileBrowser
+
+# ===== Application Entry Point =====
 if __name__ == "__main__":
+    # ===== UI Style Setup =====
+    # Use a non-native controls style so our custom QML button backgrounds are supported.
+    QQuickStyle.setStyle("Basic")
+
+    # ===== Qt Bootstrap =====
     # Minimal Qt bootstrap: load the ISC QML module and exit if it fails.
-    app = QGuiApplication(sys.argv)
+    app = QApplication(sys.argv)
     engine = QQmlApplicationEngine()
+
+    # ===== Shared Models =====
+    settings_model = LocalSettingsModel()
+    select_file_dialog_model = FileBrowser()
+    settings_model.loadSettings()
+    engine.rootContext().setContextProperty("settingsModel", settings_model)
+    engine.rootContext().setContextProperty("file_browser", select_file_dialog_model)
+
+    # ===== QML Startup =====
     engine.addImportPath(Path(__file__).parent)
     engine.loadFromModule("ISC", "Main")
 
+    # ===== Exit Handling =====
     if not engine.rootObjects():
         sys.exit(-1)
 

pyproject.toml

@@ -5,3 +5,4 @@ name = "PySide QtQuick Project"
 # ===== PySide Build Inputs =====
 [tool.pyside6-project]
 files = ["ISC/HomePage.qml", "ISC/Main.qml", "ISC/Tabs/SelectFileDialog.qml", "ISC/Tabs/SettingsTab.qml", "ISC/Tabs/qmldir", "ISC/Theme.qml", "ISC/qmldir", "backend/file_browser.py", "backend/local_settings.py", "backend/local_settings_model.py", "main.py"]
+∑