diff --git a/.gitignore b/.gitignore
index e91866ed..f34f1349 100644
--- a/.gitignore
+++ b/.gitignore
@@ -59,6 +59,9 @@ ui_*.h
 *.swo
 *.swn
 
+# CLion
+/.idea
+
 #####=== CMake ===#####
 
 CMakeCache.txt
diff --git a/src/timeline/InputBar.cpp b/src/timeline/InputBar.cpp
index bd4f59d8..78416135 100644
--- a/src/timeline/InputBar.cpp
+++ b/src/timeline/InputBar.cpp
@@ -21,19 +21,15 @@
 #include "Cache.h"
 #include "ChatPage.h"
 #include "CombinedImagePackModel.h"
-#include "CompletionProxyModel.h"
 #include "Config.h"
 #include "Logging.h"
 #include "MainWindow.h"
 #include "MatrixClient.h"
-#include "RoomsModel.h"
 #include "TimelineModel.h"
 #include "TimelineViewManager.h"
 #include "UserSettingsPage.h"
-#include "UsersModel.h"
 #include "Utils.h"
 #include "dialogs/PreviewUploadOverlay.h"
-#include "emoji/EmojiModel.h"
 
 #include "blurhash.hpp"
 
@@ -86,7 +82,7 @@ InputBar::insertMimeData(const QMimeData *md)
             }
         }
 
-        if (!path.isEmpty() && QFileInfo{path}.exists()) {
+        if (!path.isEmpty() && QFileInfo::exists(path)) {
             showPreview(*md, path, formats);
         } else {
             nhlog::ui()->warn("Clipboard does not contain any valid file paths.");
@@ -159,7 +155,7 @@ InputBar::updateAtRoom(const QString &t)
 }
 
 void
-InputBar::setText(QString newText)
+InputBar::setText(const QString &newText)
 {
     if (history_.empty())
         history_.push_front(newText);
@@ -174,7 +170,10 @@ InputBar::setText(QString newText)
     emit textChanged(newText);
 }
 void
-InputBar::updateState(int selectionStart_, int selectionEnd_, int cursorPosition_, QString text_)
+InputBar::updateState(int selectionStart_,
+                      int selectionEnd_,
+                      int cursorPosition_,
+                      const QString &text_)
 {
     if (text_.isEmpty())
         stopTyping();
@@ -292,7 +291,7 @@ InputBar::openFileSelection()
 }
 
 void
-InputBar::message(QString msg, MarkdownOverride useMarkdown, bool rainbowify)
+InputBar::message(const QString &msg, MarkdownOverride useMarkdown, bool rainbowify)
 {
     mtx::events::msg::Text text = {};
     text.body                   = msg.trimmed().toStdString();
@@ -305,7 +304,7 @@ InputBar::message(QString msg, MarkdownOverride useMarkdown, bool rainbowify)
         text.body = msg.trimmed().replace(conf::strings::matrixToMarkdownLink, "\\1").toStdString();
 
         // Don't send formatted_body, when we don't need to
-        if (text.formatted_body.find("<") == std::string::npos)
+        if (text.formatted_body.find('<') == std::string::npos)
             text.formatted_body = "";
         else
             text.format = "org.matrix.custom.html";
@@ -328,13 +327,13 @@ InputBar::message(QString msg, MarkdownOverride useMarkdown, bool rainbowify)
         for (const auto &line : related.quoted_body.split("\n")) {
             if (firstLine) {
                 firstLine = false;
-                body      = QString("> <%1> %2\n").arg(related.quoted_user).arg(line);
+                body      = QString("> <%1> %2\n").arg(related.quoted_user, line);
             } else {
                 body += QString("> %1\n").arg(line);
             }
         }
 
-        text.body = QString("%1\n%2").arg(body).arg(msg).toStdString();
+        text.body = QString("%1\n%2").arg(body, msg).toStdString();
 
         // NOTE(Nico): rich replies always need a formatted_body!
         text.format = "org.matrix.custom.html";
@@ -356,7 +355,7 @@ InputBar::message(QString msg, MarkdownOverride useMarkdown, bool rainbowify)
 }
 
 void
-InputBar::emote(QString msg, bool rainbowify)
+InputBar::emote(const QString &msg, bool rainbowify)
 {
     auto html = utils::markdownToHtml(msg, rainbowify);
 
@@ -384,7 +383,7 @@ InputBar::emote(QString msg, bool rainbowify)
 }
 
 void
-InputBar::notice(QString msg, bool rainbowify)
+InputBar::notice(const QString &msg, bool rainbowify)
 {
     auto html = utils::markdownToHtml(msg, rainbowify);
 
@@ -566,7 +565,7 @@ InputBar::sticker(CombinedImagePackModel *model, int row)
 }
 
 void
-InputBar::command(QString command, QString args)
+InputBar::command(const QString &command, QString args)
 {
     if (command == "me") {
         emote(args, false);
@@ -595,15 +594,15 @@ InputBar::command(QString command, QString args)
             .toStdString();
         member.membership = mtx::events::state::Membership::Join;
 
-        http::client()->send_state_event(room->roomId().toStdString(),
-                                         http::client()->user_id().to_string(),
-                                         member,
-                                         [](mtx::responses::EventId, mtx::http::RequestErr err) {
-                                             if (err)
-                                                 nhlog::net()->error(
-                                                   "Failed to set room displayname: {}",
-                                                   err->matrix_error.error);
-                                         });
+        http::client()->send_state_event(
+          room->roomId().toStdString(),
+          http::client()->user_id().to_string(),
+          member,
+          [](const mtx::responses::EventId &, mtx::http::RequestErr err) {
+              if (err)
+                  nhlog::net()->error("Failed to set room displayname: {}",
+                                      err->matrix_error.error);
+          });
     } else if (command == "shrug") {
         message("¯\\_(ツ)_/¯" + (args.isEmpty() ? "" : " " + args));
     } else if (command == "fliptable") {
@@ -654,15 +653,14 @@ InputBar::command(QString command, QString args)
 }
 
 void
-InputBar::showPreview(const QMimeData &source, QString path, const QStringList &formats)
+InputBar::showPreview(const QMimeData &source, const QString &path, const QStringList &formats)
 {
-    dialogs::PreviewUploadOverlay *previewDialog_ =
-      new dialogs::PreviewUploadOverlay(ChatPage::instance());
+    auto *previewDialog_ = new dialogs::PreviewUploadOverlay(ChatPage::instance());
     previewDialog_->setAttribute(Qt::WA_DeleteOnClose);
 
     // Force SVG to _not_ be handled as an image, but as raw data
-    if (source.hasImage() && (!formats.size() || formats.front() != "image/svg+xml")) {
-        if (formats.size() && formats.front().startsWith("image/")) {
+    if (source.hasImage() && (formats.empty() || formats.front() != "image/svg+xml")) {
+        if (!formats.empty() && formats.front().startsWith("image/")) {
             // known format, keep as-is
             previewDialog_->setPreview(qvariant_cast<QImage>(source.imageData()), formats.front());
         } else {
@@ -672,7 +670,7 @@ InputBar::showPreview(const QMimeData &source, QString path, const QStringList &
     } else if (!path.isEmpty())
         previewDialog_->setPreview(path);
     else if (!formats.isEmpty()) {
-        auto mime = formats.first();
+        const auto &mime = formats.first();
         previewDialog_->setPreview(source.data(mime), mime);
     } else {
         setUploading(false);
@@ -688,7 +686,7 @@ InputBar::showPreview(const QMimeData &source, QString path, const QStringList &
       previewDialog_,
       &dialogs::PreviewUploadOverlay::confirmUpload,
       this,
-      [this](const QByteArray data, const QString &mime, const QString &fn) {
+      [this](const QByteArray &data, const QString &mime, const QString &fn) {
           if (!data.size()) {
               nhlog::ui()->warn("Attempted to upload zero-byte file?! Mimetype {}, filename {}",
                                 mime.toStdString(),
diff --git a/src/timeline/InputBar.h b/src/timeline/InputBar.h
index 4a0f4401..65593244 100644
--- a/src/timeline/InputBar.h
+++ b/src/timeline/InputBar.h
@@ -32,7 +32,7 @@ class InputBar : public QObject
     Q_PROPERTY(QString text READ text NOTIFY textChanged)
 
 public:
-    InputBar(TimelineModel *parent)
+    explicit InputBar(TimelineModel *parent)
       : QObject()
       , room(parent)
     {
@@ -45,20 +45,20 @@ public:
     }
 
 public slots:
-    QString text() const;
+    [[nodiscard]] QString text() const;
     QString previousText();
     QString nextText();
-    void setText(QString newText);
+    void setText(const QString &newText);
 
-    bool containsAtRoom() const { return containsAtRoom_; }
+    [[nodiscard]] bool containsAtRoom() const { return containsAtRoom_; }
 
     void send();
     void paste(bool fromMouse);
     void insertMimeData(const QMimeData *data);
-    void updateState(int selectionStart, int selectionEnd, int cursorPosition, QString text);
+    void updateState(int selectionStart, int selectionEnd, int cursorPosition, const QString &text);
     void openFileSelection();
-    bool uploading() const { return uploading_; }
-    void message(QString body,
+    [[nodiscard]] bool uploading() const { return uploading_; }
+    void message(const QString &body,
                  MarkdownOverride useMarkdown = MarkdownOverride::NOT_SPECIFIED,
                  bool rainbowify              = false);
     void reaction(const QString &reactedEvent, const QString &reactionKey);
@@ -75,9 +75,9 @@ signals:
     void containsAtRoomChanged();
 
 private:
-    void emote(QString body, bool rainbowify);
-    void notice(QString body, bool rainbowify);
-    void command(QString name, QString args);
+    void emote(const QString &body, bool rainbowify);
+    void notice(const QString &body, bool rainbowify);
+    void command(const QString &name, QString args);
     void image(const QString &filename,
                const std::optional<mtx::crypto::EncryptedFile> &file,
                const QString &url,
@@ -101,7 +101,7 @@ private:
                const QString &mime,
                uint64_t dsize);
 
-    void showPreview(const QMimeData &source, QString path, const QStringList &formats);
+    void showPreview(const QMimeData &source, const QString &path, const QStringList &formats);
     void setUploading(bool value)
     {
         if (value != uploading_) {