refactor: replace inline styles with new CSS utility classes across various pages.

.gitignore

@@ -5,6 +5,7 @@ config.yaml
 backend/data/zhealth.db
 backend/data/zhealth.db-wal
 backend/data/zhealth.db-shm
+backend/data/uploads/
 
 # FRONTEND
 

backend/Cargo.toml

@@ -10,7 +10,9 @@ path = "src/main.rs"
 [dependencies]
 # Web Framework
 axum = "0.8"
+axum-extra = { version = "0.10", features = ["multipart"] }
 tokio = { version = "1", features = ["full"] }
+tokio-util = { version = "0.7", features = ["io"] }
 tower = "0.5"
 tower-http = { version = "0.6", features = ["cors", "trace"] }
 

backend/sample.config.yaml

@@ -9,6 +9,7 @@ server:
 paths:
   database: "./data/zhealth.db"
   logs: "./logs"
+  uploads: "./data/uploads"
 
 logging:
   level: "info"  # Options: trace | debug | info | warn | error

backend/src/config.rs

@@ -24,6 +24,7 @@ pub struct ServerConfig {
 pub struct PathsConfig {
     pub database: String,
     pub logs: String,
+    pub uploads: String,
 }
 
 #[derive(Debug, Deserialize)]

backend/src/db.rs

@@ -4,7 +4,7 @@ use sea_orm::{ConnectionTrait, Database, DatabaseConnection, DbBackend, DbErr, S
 use sea_orm::sea_query::SqliteQueryBuilder;
 
 use crate::config::Config;
-use crate::models::bio::{biomarker, biomarker_category, biomarker_entry, biomarker_reference_rule};
+use crate::models::bio::{biomarker, biomarker_category, biomarker_entry, biomarker_reference_rule, source};
 use crate::models::user::{diet, role, session, user};
 
 /// Connect to the SQLite database.
@@ -33,6 +33,7 @@ pub async fn run_migrations(db: &DatabaseConnection) -> Result<(), DbErr> {
         schema.create_table_from_entity(biomarker_category::Entity),
         schema.create_table_from_entity(biomarker::Entity),
         schema.create_table_from_entity(biomarker_reference_rule::Entity),
+        schema.create_table_from_entity(source::Entity),
         schema.create_table_from_entity(biomarker_entry::Entity),
     ];
 

backend/src/handlers/entries.rs

@@ -60,6 +60,7 @@ pub async fn create_entry(
         value: Set(req.value),
         measured_at: Set(measured_at),
         notes: Set(req.notes.clone()),
+        source_id: Set(None),
         created_at: Set(now),
     };
 

backend/src/handlers/mod.rs

@@ -5,4 +5,5 @@ pub mod biomarkers;
 pub mod categories;
 pub mod diets;
 pub mod entries;
+pub mod sources;
 pub mod users;

backend/src/handlers/sources.rs

@@ -0,0 +1,263 @@
+//! Sources API handlers - file upload and management.
+
+use axum::{
+    extract::{Path, State},
+    http::StatusCode,
+    Json,
+};
+use axum_extra::extract::Multipart;
+use chrono::Utc;
+use sea_orm::{ActiveModelTrait, DatabaseConnection, EntityTrait, Set};
+use serde::{Deserialize, Serialize};
+use std::path::PathBuf;
+use tokio::fs;
+use tokio::io::AsyncWriteExt;
+
+use crate::models::bio::source;
+
+/// Response for a source.
+#[derive(Serialize)]
+pub struct SourceResponse {
+    pub id: i32,
+    pub user_id: i32,
+    pub name: String,
+    pub file_path: String,
+    pub file_type: String,
+    pub file_size: i64,
+    pub ocr_data: Option<String>,
+    pub description: Option<String>,
+    pub uploaded_at: String,
+}
+
+/// State that includes config for upload path.
+#[derive(Clone)]
+pub struct SourcesState {
+    pub db: DatabaseConnection,
+    pub uploads_path: PathBuf,
+}
+
+/// GET /api/sources - List all sources for current user.
+pub async fn list_sources(
+    State(state): State<SourcesState>,
+    // TODO: Get user_id from session
+) -> Result<Json<Vec<SourceResponse>>, StatusCode> {
+    let sources = source::Entity::find()
+        .all(&state.db)
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+
+    let items: Vec<SourceResponse> = sources
+        .into_iter()
+        .map(|s| SourceResponse {
+            id: s.id,
+            user_id: s.user_id,
+            name: s.name,
+            file_path: s.file_path,
+            file_type: s.file_type,
+            file_size: s.file_size,
+            ocr_data: s.ocr_data,
+            description: s.description,
+            uploaded_at: s.uploaded_at.to_string(),
+        })
+        .collect();
+
+    Ok(Json(items))
+}
+
+/// GET /api/sources/:id - Get a source by ID.
+pub async fn get_source(
+    State(state): State<SourcesState>,
+    Path(id): Path<i32>,
+) -> Result<Json<SourceResponse>, StatusCode> {
+    let s = source::Entity::find_by_id(id)
+        .one(&state.db)
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?
+        .ok_or(StatusCode::NOT_FOUND)?;
+
+    Ok(Json(SourceResponse {
+        id: s.id,
+        user_id: s.user_id,
+        name: s.name,
+        file_path: s.file_path,
+        file_type: s.file_type,
+        file_size: s.file_size,
+        ocr_data: s.ocr_data,
+        description: s.description,
+        uploaded_at: s.uploaded_at.to_string(),
+    }))
+}
+
+/// POST /api/sources - Upload a new source file.
+pub async fn upload_source(
+    State(state): State<SourcesState>,
+    mut multipart: Multipart,
+) -> Result<Json<SourceResponse>, StatusCode> {
+    let mut file_name: Option<String> = None;
+    let mut file_type: Option<String> = None;
+    let mut file_data: Option<Vec<u8>> = None;
+    let mut name: Option<String> = None;
+    let mut description: Option<String> = None;
+    let mut user_id: Option<i32> = None;
+
+    while let Some(field) = multipart.next_field().await.map_err(|e| {
+        tracing::error!("Multipart error: {:?}", e);
+        StatusCode::BAD_REQUEST
+    })? {
+        let field_name = field.name().unwrap_or("").to_string();
+
+        match field_name.as_str() {
+            "file" => {
+                file_name = field.file_name().map(|s| s.to_string());
+                file_type = field.content_type().map(|s| s.to_string());
+                file_data = Some(field.bytes().await.map_err(|e| {
+                    tracing::error!("Failed to read file data: {:?}", e);
+                    StatusCode::BAD_REQUEST
+                })?.to_vec());
+            }
+            "name" => {
+                name = Some(field.text().await.map_err(|_| StatusCode::BAD_REQUEST)?);
+            }
+            "description" => {
+                description = Some(field.text().await.map_err(|_| StatusCode::BAD_REQUEST)?);
+            }
+            "user_id" => {
+                let text = field.text().await.map_err(|_| StatusCode::BAD_REQUEST)?;
+                user_id = Some(text.parse().map_err(|_| StatusCode::BAD_REQUEST)?);
+            }
+            _ => {}
+        }
+    }
+
+    let file_data = file_data.ok_or(StatusCode::BAD_REQUEST)?;
+    let user_id = user_id.ok_or(StatusCode::BAD_REQUEST)?;
+    let original_name = file_name.unwrap_or_else(|| "upload".to_string());
+    let display_name = name.unwrap_or_else(|| original_name.clone());
+    let content_type = file_type.unwrap_or_else(|| "application/octet-stream".to_string());
+    let file_size = file_data.len() as i64;
+
+    // Generate unique filename
+    let timestamp = Utc::now().timestamp_millis();
+    let safe_name = original_name.replace(['/', '\\', ':', '*', '?', '"', '<', '>', '|'], "_");
+    let stored_name = format!("{}_{}", timestamp, safe_name);
+
+    // Ensure uploads directory exists
+    fs::create_dir_all(&state.uploads_path).await.map_err(|e| {
+        tracing::error!("Failed to create uploads dir: {:?}", e);
+        StatusCode::INTERNAL_SERVER_ERROR
+    })?;
+
+    // Write file
+    let file_path = state.uploads_path.join(&stored_name);
+    let mut file = fs::File::create(&file_path).await.map_err(|e| {
+        tracing::error!("Failed to create file: {:?}", e);
+        StatusCode::INTERNAL_SERVER_ERROR
+    })?;
+    file.write_all(&file_data).await.map_err(|e| {
+        tracing::error!("Failed to write file: {:?}", e);
+        StatusCode::INTERNAL_SERVER_ERROR
+    })?;
+
+    let now = Utc::now().naive_utc();
+
+    let new_source = source::ActiveModel {
+        user_id: Set(user_id),
+        name: Set(display_name.clone()),
+        file_path: Set(file_path.to_string_lossy().to_string()),
+        file_type: Set(content_type.clone()),
+        file_size: Set(file_size),
+        ocr_data: Set(None),
+        description: Set(description.clone()),
+        uploaded_at: Set(now),
+        ..Default::default()
+    };
+
+    let inserted = new_source
+        .insert(&state.db)
+        .await
+        .map_err(|e| {
+            tracing::error!("Failed to insert source: {:?}", e);
+            StatusCode::INTERNAL_SERVER_ERROR
+        })?;
+
+    Ok(Json(SourceResponse {
+        id: inserted.id,
+        user_id: inserted.user_id,
+        name: inserted.name,
+        file_path: inserted.file_path,
+        file_type: inserted.file_type,
+        file_size: inserted.file_size,
+        ocr_data: inserted.ocr_data,
+        description: inserted.description,
+        uploaded_at: inserted.uploaded_at.to_string(),
+    }))
+}
+
+/// DELETE /api/sources/:id - Delete a source.
+pub async fn delete_source(
+    State(state): State<SourcesState>,
+    Path(id): Path<i32>,
+) -> Result<StatusCode, StatusCode> {
+    // Get the source first to delete the file
+    let s = source::Entity::find_by_id(id)
+        .one(&state.db)
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?
+        .ok_or(StatusCode::NOT_FOUND)?;
+
+    // Delete file from disk
+    if let Err(e) = fs::remove_file(&s.file_path).await {
+        tracing::warn!("Failed to delete file {}: {:?}", s.file_path, e);
+    }
+
+    // Delete from database
+    let result = source::Entity::delete_by_id(id)
+        .exec(&state.db)
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+
+    if result.rows_affected == 0 {
+        return Err(StatusCode::NOT_FOUND);
+    }
+
+    Ok(StatusCode::NO_CONTENT)
+}
+
+/// Request to update OCR data for a source.
+#[derive(Deserialize)]
+pub struct UpdateOcrRequest {
+    pub ocr_data: String,
+}
+
+/// PUT /api/sources/:id/ocr - Update OCR data for a source.
+pub async fn update_ocr(
+    State(state): State<SourcesState>,
+    Path(id): Path<i32>,
+    Json(req): Json<UpdateOcrRequest>,
+) -> Result<Json<SourceResponse>, StatusCode> {
+    let existing = source::Entity::find_by_id(id)
+        .one(&state.db)
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?
+        .ok_or(StatusCode::NOT_FOUND)?;
+
+    let mut active: source::ActiveModel = existing.into();
+    active.ocr_data = Set(Some(req.ocr_data));
+
+    let updated = active
+        .update(&state.db)
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+
+    Ok(Json(SourceResponse {
+        id: updated.id,
+        user_id: updated.user_id,
+        name: updated.name,
+        file_path: updated.file_path,
+        file_type: updated.file_type,
+        file_size: updated.file_size,
+        ocr_data: updated.ocr_data,
+        description: updated.description,
+        uploaded_at: updated.uploaded_at.to_string(),
+    }))
+}

backend/src/main.rs

@@ -17,6 +17,7 @@ use axum_login::{
 };
 use sea_orm::DatabaseConnection;
 use std::net::SocketAddr;
+use std::path::PathBuf;
 use time::Duration;
 use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};
 
@@ -144,9 +145,24 @@ fn create_router(db: DatabaseConnection, config: &config::Config) -> Router {
         .route("/api/users/{user_id}/entries", get(handlers::entries::list_user_entries))
         .route_layer(middleware::from_fn(require_auth));
 
+    // Sources routes (need separate state for uploads path)
+    let sources_state = handlers::sources::SourcesState {
+        db: db.clone(),
+        uploads_path: PathBuf::from(&config.paths.uploads),
+    };
+    let sources_routes = Router::new()
+        .route("/api/sources", get(handlers::sources::list_sources)
+            .post(handlers::sources::upload_source))
+        .route("/api/sources/{id}", get(handlers::sources::get_source)
+            .delete(handlers::sources::delete_source))
+        .route("/api/sources/{id}/ocr", put(handlers::sources::update_ocr))
+        .route_layer(middleware::from_fn(require_auth))
+        .with_state(sources_state);
+
     Router::new()
         .merge(public_routes)
         .merge(protected_routes)
+        .merge(sources_routes)
         .layer(auth_layer)
         .with_state(db)
 }

backend/src/models/bio/biomarker_entry.rs

@@ -26,6 +26,9 @@ pub struct Model {
     #[sea_orm(column_type = "Text", nullable)]
     pub notes: Option<String>,
 
+    /// Optional foreign key to source document
+    pub source_id: Option<i32>,
+
     pub created_at: DateTime,
 }
 
@@ -44,6 +47,13 @@ pub enum Relation {
         to = "crate::models::user::user::Column::Id"
     )]
     User,
+
+    #[sea_orm(
+        belongs_to = "super::source::Entity",
+        from = "Column::SourceId",
+        to = "super::source::Column::Id"
+    )]
+    Source,
 }
 
 impl Related<super::biomarker::Entity> for Entity {
@@ -58,4 +68,10 @@ impl Related<crate::models::user::user::Entity> for Entity {
     }
 }
 
+impl Related<super::source::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Source.def()
+    }
+}
+
 impl ActiveModelBehavior for ActiveModel {}

backend/src/models/bio/mod.rs

@@ -4,8 +4,10 @@ pub mod biomarker;
 pub mod biomarker_category;
 pub mod biomarker_entry;
 pub mod biomarker_reference_rule;
+pub mod source;
 
 pub use biomarker::Entity as Biomarker;
 pub use biomarker_category::Entity as BiomarkerCategory;
 pub use biomarker_entry::Entity as BiomarkerEntry;
 pub use biomarker_reference_rule::Entity as BiomarkerReferenceRule;
+pub use source::Entity as Source;

backend/src/models/bio/source.rs

@@ -0,0 +1,67 @@
+//! Source entity - user-uploaded documents with OCR data.
+
+use sea_orm::entity::prelude::*;
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Serialize, Deserialize)]
+#[sea_orm(table_name = "sources")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: i32,
+
+    /// Foreign key to users table
+    pub user_id: i32,
+
+    /// Display name for the source
+    #[sea_orm(column_type = "Text")]
+    pub name: String,
+
+    /// Path to stored file
+    #[sea_orm(column_type = "Text")]
+    pub file_path: String,
+
+    /// MIME type (e.g., "application/pdf", "image/jpeg")
+    #[sea_orm(column_type = "Text")]
+    pub file_type: String,
+
+    /// File size in bytes
+    pub file_size: i64,
+
+    /// OCR parsed data as JSON
+    #[sea_orm(column_type = "Text", nullable)]
+    pub ocr_data: Option<String>,
+
+    /// Optional description/notes
+    #[sea_orm(column_type = "Text", nullable)]
+    pub description: Option<String>,
+
+    /// When the file was uploaded
+    pub uploaded_at: DateTime,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "crate::models::user::user::Entity",
+        from = "Column::UserId",
+        to = "crate::models::user::user::Column::Id"
+    )]
+    User,
+
+    #[sea_orm(has_many = "super::biomarker_entry::Entity")]
+    BiomarkerEntries,
+}
+
+impl Related<crate::models::user::user::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::User.def()
+    }
+}
+
+impl Related<super::biomarker_entry::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::BiomarkerEntries.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}

frontend/src/index.css

@@ -110,6 +110,224 @@ a:hover {
   outline-offset: 2px;
 }
 
+/* =====================================================
+   UTILITY CLASSES
+   ===================================================== */
+
+/* Spacing - Margin Bottom */
+.mb-xs {
+  margin-bottom: var(--space-xs);
+}
+
+.mb-sm {
+  margin-bottom: var(--space-sm);
+}
+
+.mb-md {
+  margin-bottom: var(--space-md);
+}
+
+.mb-lg {
+  margin-bottom: var(--space-lg);
+}
+
+.mb-xl {
+  margin-bottom: var(--space-xl);
+}
+
+/* Spacing - Margin Top */
+.mt-xs {
+  margin-top: var(--space-xs);
+}
+
+.mt-sm {
+  margin-top: var(--space-sm);
+}
+
+.mt-md {
+  margin-top: var(--space-md);
+}
+
+.mt-lg {
+  margin-top: var(--space-lg);
+}
+
+.mt-xl {
+  margin-top: var(--space-xl);
+}
+
+/* Spacing - Margin Left */
+.ml-xs {
+  margin-left: var(--space-xs);
+}
+
+.ml-sm {
+  margin-left: var(--space-sm);
+}
+
+.ml-md {
+  margin-left: var(--space-md);
+}
+
+/* Spacing - Padding */
+.p-sm {
+  padding: var(--space-sm);
+}
+
+.p-md {
+  padding: var(--space-md);
+}
+
+.p-lg {
+  padding: var(--space-lg);
+}
+
+.p-xl {
+  padding: var(--space-xl);
+}
+
+/* Flex Layouts */
+.flex {
+  display: flex;
+}
+
+.flex-col {
+  display: flex;
+  flex-direction: column;
+}
+
+.flex-center {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.flex-between {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+}
+
+.items-center {
+  align-items: center;
+}
+
+.justify-center {
+  justify-content: center;
+}
+
+/* Gaps */
+.gap-xs {
+  gap: var(--space-xs);
+}
+
+.gap-sm {
+  gap: var(--space-sm);
+}
+
+.gap-md {
+  gap: var(--space-md);
+}
+
+.gap-lg {
+  gap: var(--space-lg);
+}
+
+/* Text Utilities */
+.text-center {
+  text-align: center;
+}
+
+.text-xs {
+  font-size: 12px;
+}
+
+.text-sm {
+  font-size: 14px;
+}
+
+.font-medium {
+  font-weight: 500;
+}
+
+.font-semibold {
+  font-weight: 600;
+}
+
+.uppercase {
+  text-transform: uppercase;
+}
+
+.truncate {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+/* Modal */
+.modal-overlay {
+  position: fixed;
+  inset: 0;
+  background-color: rgba(0, 0, 0, 0.5);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  z-index: 1000;
+}
+
+.modal-content {
+  max-width: 400px;
+  text-align: center;
+}
+
+/* Display */
+.hidden {
+  display: none;
+}
+
+.block {
+  display: block;
+}
+
+/* Width */
+.w-full {
+  width: 100%;
+}
+
+.max-w-sm {
+  max-width: 400px;
+}
+
+.max-w-md {
+  max-width: 600px;
+}
+
+.max-w-lg {
+  max-width: 800px;
+}
+
+.max-w-xl {
+  max-width: 1000px;
+}
+
+/* Min Width / Flex */
+.min-w-0 {
+  min-width: 0;
+}
+
+.flex-1 {
+  flex: 1;
+}
+
+/* Border */
+.border-t {
+  border-top: 1px solid var(--border);
+}
+
+/* =====================================================
+   END UTILITY CLASSES
+   ===================================================== */
+
 /* Button Base */
 .btn {
   display: inline-flex;
@@ -463,7 +681,7 @@ select.input {
 }
 
 .biomarker-info {
-  flex: 0 0 240px;
+  flex: 0 0 320px;
   min-width: 0;
   display: flex;
   flex-direction: row;
@@ -473,13 +691,11 @@ select.input {
 
 .biomarker-info .biomarker-name {
   font-size: 14px;
-  white-space: nowrap;
-  overflow: hidden;
-  text-overflow: ellipsis;
 }
 
 .biomarker-info .biomarker-unit {
   font-size: 11px;
+  flex-shrink: 0;
 }
 
 /* Biomarker Scale Bar */
@@ -786,3 +1002,96 @@ select.input {
   padding: var(--space-lg);
   color: var(--text-secondary);
 }
+
+/* =====================================================
+   SOURCES PAGE
+   ===================================================== */
+
+/* Upload Zone */
+.upload-zone {
+  border: 2px dashed var(--border);
+  border-radius: var(--radius-md);
+  padding: var(--space-xl);
+  text-align: center;
+  cursor: pointer;
+  transition: all 0.2s;
+}
+
+.upload-zone:hover {
+  border-color: var(--accent);
+  background-color: color-mix(in srgb, var(--accent) 5%, var(--bg-secondary));
+}
+
+.upload-zone.drag-over {
+  border-color: var(--accent);
+  background-color: color-mix(in srgb, var(--accent) 5%, var(--bg-secondary));
+}
+
+.upload-zone.uploading {
+  cursor: wait;
+}
+
+/* Upload Icon */
+.upload-icon {
+  width: 36px;
+  height: 36px;
+  display: block;
+  margin: 0 auto;
+}
+
+/* Source Item */
+.source-item {
+  padding: var(--space-sm) 0;
+  border-bottom: 1px solid var(--border);
+}
+
+/* Status Parsed */
+.status-parsed {
+  color: var(--indicator-normal);
+}
+
+/* Icon sizes */
+.icon-sm {
+  width: 14px;
+  height: 14px;
+}
+
+/* =====================================================
+   DASHBOARD PAGE
+   ===================================================== */
+
+/* Category Card */
+.category-card {
+  padding: 0;
+}
+
+/* Category Name */
+.category-name {
+  font-size: 16px;
+  font-weight: 600;
+  text-transform: uppercase;
+}
+
+/* Collapsible Header Button */
+.collapsible-header {
+  background: none;
+  border: none;
+  cursor: pointer;
+  text-align: left;
+  color: var(--text-primary);
+}
+
+/* Collapse Icon */
+.collapse-icon {
+  width: 18px;
+  height: 18px;
+  transition: transform 0.2s;
+}
+
+/* =====================================================
+   INSIGHTS PAGE
+   ===================================================== */
+
+.coming-soon-icon {
+  font-size: 48px;
+}

frontend/src/pages/Admin.tsx

@@ -121,7 +121,7 @@ export function AdminPage() {
     const isConfigAdmin = (user: User) => user.username === CONFIG_ADMIN_USERNAME
 
     if (loading) {
-        return <div style={{ padding: 'var(--space-lg)' }}>Loading...</div>
+        return <div className="p-lg">Loading...</div>
     }
 
     if (!currentUser || currentUser.role !== 'admin') {
@@ -129,10 +129,10 @@ export function AdminPage() {
     }
 
     return (
-        <div style={{ padding: 'var(--space-lg)', maxWidth: '1000px', margin: '0 auto' }}>
+        <div className="admin-page p-lg max-w-xl">
-            <header style={{ marginBottom: 'var(--space-xl)' }}>
+            <header className="mb-xl">
                 <Link to="/" className="text-secondary text-sm">← Back to Dashboard</Link>
-                <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', marginTop: 'var(--space-sm)' }}>
+                <div className="flex-between mt-sm">
                     <h1>User Management</h1>
                     <button className="btn btn-primary" onClick={() => setShowCreateModal(true)}>
                         + New User
@@ -172,7 +172,7 @@ export function AdminPage() {
                                 </td>
                                 <td className="text-secondary text-sm">{new Date(user.created_at).toLocaleDateString()}</td>
                                 <td>
-                                    <div style={{ display: 'flex', gap: 'var(--space-xs)' }}>
+                                    <div className="flex gap-xs">
                                         <button
                                             className="btn btn-secondary btn-sm"
                                             onClick={() => setEditingUser(user)}
@@ -243,7 +243,7 @@ export function AdminPage() {
                                     <option value="admin">Admin</option>
                                 </select>
                             </div>
-                            <div style={{ display: 'flex', gap: 'var(--space-sm)', marginTop: 'var(--space-lg)' }}>
+                            <div className="flex gap-sm mt-lg">
                                 <button type="submit" className="btn btn-primary">Create</button>
                                 <button type="button" className="btn btn-secondary" onClick={() => setShowCreateModal(false)}>Cancel</button>
                             </div>
@@ -327,7 +327,7 @@ function EditUserModal({ user, onClose, onSave, setMessage }: EditUserModalProps
                             placeholder="Full name"
                         />
                     </div>
-                    <div style={{ display: 'flex', gap: 'var(--space-sm)', marginTop: 'var(--space-lg)' }}>
+                    <div className="flex gap-sm mt-lg">
                         <button type="submit" className="btn btn-primary" disabled={saving}>
                             {saving ? 'Saving...' : 'Save'}
                         </button>
@@ -419,7 +419,7 @@ function ResetPasswordModal({ user, onClose, onSave, setMessage }: ResetPassword
                         />
                     </div>
                     {error && <div className="error-message">{error}</div>}
-                    <div style={{ display: 'flex', gap: 'var(--space-sm)', marginTop: 'var(--space-lg)' }}>
+                    <div className="flex gap-sm mt-lg">
                         <button type="submit" className="btn btn-primary" disabled={saving}>
                             {saving ? 'Resetting...' : 'Reset Password'}
                         </button>

frontend/src/pages/Dashboard.tsx

@@ -60,45 +60,38 @@ export function DashboardPage() {
             </header>
 
             <section>
-                <h2 style={{ marginBottom: 'var(--space-md)' }}>Biomarker Categories</h2>
+                <h2 className="mb-md">Biomarker Categories</h2>
-                <div style={{ display: 'flex', flexDirection: 'column', gap: 'var(--space-sm)' }}>
+                <div className="flex-col gap-sm">
                     {categories.map(category => {
                         const categoryBiomarkers = getBiomarkersForCategory(category.id)
                         const isExpanded = expandedCategories.has(category.id)
 
                         return (
-                            <div key={category.id} className="card" style={{ padding: 0 }}>
+                            <div key={category.id} className="card category-card">
                                 <button
-                                    className="collapsible-header"
+                                    className="collapsible-header w-full p-md flex-between"
                                     onClick={() => toggleCategory(category.id)}
-                                    style={{
-                                        width: '100%',
-                                        padding: 'var(--space-md)',
-                                        display: 'flex',
-                                        justifyContent: 'space-between',
-                                        alignItems: 'center',
-                                        background: 'none',
-                                        border: 'none',
-                                        cursor: 'pointer',
-                                        textAlign: 'left',
-                                        color: 'var(--text-primary)',
-                                    }}
                                 >
                                     <div>
-                                        <span style={{ fontSize: '16px', fontWeight: 600, textTransform: 'uppercase' }}>{category.name}</span>
+                                        <span className="category-name">{category.name}</span>
-                                        <span className="text-secondary text-sm" style={{ marginLeft: 'var(--space-sm)' }}>
+                                        <span className="text-secondary text-sm ml-sm">
                                             ({categoryBiomarkers.length} biomarkers)
                                         </span>
                                     </div>
-                                    <span style={{ fontSize: '18px', transition: 'transform 0.2s', transform: isExpanded ? 'rotate(180deg)' : 'rotate(0)' }}>
+                                    <img
-                                        ▼
+                                        src="/icons/general/icons8-collapse-arrow-50.png"
-                                    </span>
+                                        alt="expand"
+                                        className="theme-icon collapse-icon"
+                                        style={{
+                                            transform: isExpanded ? 'rotate(180deg)' : 'rotate(0)'
+                                        }}
+                                    />
                                 </button>
 
                                 {isExpanded && (
-                                    <div style={{ borderTop: '1px solid var(--border)', padding: 'var(--space-sm)' }}>
+                                    <div className="category-content border-t p-sm">
                                         {categoryBiomarkers.length === 0 ? (
-                                            <p className="text-secondary text-sm" style={{ padding: 'var(--space-sm)' }}>
+                                            <p className="text-secondary text-sm p-sm">
                                                 No biomarkers in this category
                                             </p>
                                         ) : (

frontend/src/pages/Insights.tsx

@@ -6,8 +6,8 @@ export function InsightsPage() {
                 <p className="text-secondary">AI-powered analysis of your health data</p>
             </header>
 
-            <div className="card" style={{ textAlign: 'center', padding: 'var(--space-xl)' }}>
+            <div className="card text-center p-xl">
-                <div style={{ fontSize: '48px', marginBottom: 'var(--space-md)' }}>🚀</div>
+                <div className="coming-soon-icon mb-md">🚀</div>
                 <h3>Coming Soon</h3>
                 <p className="text-secondary">
                     AI-generated health insights and recommendations based on your biomarker data.

frontend/src/pages/Login.tsx

@@ -91,7 +91,7 @@ export function LoginPage() {
                     </button>
                 </form>
 
-                <p className="text-secondary text-sm" style={{ marginTop: 'var(--space-md)', textAlign: 'center' }}>
+                <p className="text-secondary text-sm mt-md text-center">
                     Don't have an account? <Link to="/signup">Sign up</Link>
                 </p>
             </div>

frontend/src/pages/Profile.tsx

@@ -123,7 +123,7 @@ export function ProfilePage() {
     }
 
     return (
-        <div className="page" style={{ maxWidth: '600px' }}>
+        <div className="page max-w-md">
             <header className="page-header">
                 <h1>Profile</h1>
                 <p className="text-secondary">Manage your account and health information</p>
@@ -131,8 +131,8 @@ export function ProfilePage() {
 
             <form onSubmit={handleSubmit}>
                 {/* Account Info */}
-                <div className="card" style={{ marginBottom: 'var(--space-lg)' }}>
+                <div className="card mb-lg">
-                    <h3 style={{ marginBottom: 'var(--space-md)' }}>Account</h3>
+                    <h3 className="mb-md">Account</h3>
                     <div className="form-group">
                         <label>Username</label>
                         <input type="text" className="input" value={username} disabled />
@@ -165,8 +165,8 @@ export function ProfilePage() {
                 </div>
 
                 {/* Physical Info */}
-                <div className="card" style={{ marginBottom: 'var(--space-lg)' }}>
+                <div className="card mb-lg">
-                    <h3 style={{ marginBottom: 'var(--space-md)' }}>Physical Info</h3>
+                    <h3 className="mb-md">Physical Info</h3>
 
                     <div className="form-group">
                         <label htmlFor="height">Height (cm)</label>
@@ -214,8 +214,8 @@ export function ProfilePage() {
                 </div>
 
                 {/* Lifestyle */}
-                <div className="card" style={{ marginBottom: 'var(--space-lg)' }}>
+                <div className="card mb-lg">
-                    <h3 style={{ marginBottom: 'var(--space-md)' }}>Lifestyle</h3>
+                    <h3 className="mb-md">Lifestyle</h3>
 
                     <div className="form-group">
                         <label htmlFor="diet">Diet</label>

frontend/src/pages/Signup.tsx

@@ -98,7 +98,7 @@ export function SignupPage() {
                     </button>
                 </form>
 
-                <p className="text-secondary text-sm" style={{ marginTop: 'var(--space-md)', textAlign: 'center' }}>
+                <p className="text-secondary text-sm mt-md text-center">
                     Already have an account? <Link to="/login">Sign in</Link>
                 </p>
             </div>

frontend/src/pages/Sources.tsx

@@ -1,4 +1,114 @@
+import { useEffect, useRef, useState } from 'react'
+
+interface Source {
+    id: number
+    user_id: number
+    name: string
+    file_path: string
+    file_type: string
+    file_size: number
+    ocr_data: string | null
+    description: string | null
+    uploaded_at: string
+}
+
 export function SourcesPage() {
+    const [sources, setSources] = useState<Source[]>([])
+    const [loading, setLoading] = useState(true)
+    const [uploading, setUploading] = useState(false)
+    const [error, setError] = useState<string | null>(null)
+    const [dragOver, setDragOver] = useState(false)
+    const [deleteConfirmId, setDeleteConfirmId] = useState<number | null>(null)
+    const fileInputRef = useRef<HTMLInputElement>(null)
+
+    // Fetch sources on mount
+    useEffect(() => {
+        fetchSources()
+    }, [])
+
+    const fetchSources = async () => {
+        try {
+            const res = await fetch('/api/sources', { credentials: 'include' })
+            if (res.ok) {
+                const data = await res.json()
+                setSources(data)
+            }
+        } catch (e) {
+            console.error('Failed to fetch sources:', e)
+        } finally {
+            setLoading(false)
+        }
+    }
+
+    const handleUpload = async (files: FileList | null) => {
+        if (!files || files.length === 0) return
+
+        setUploading(true)
+        setError(null)
+
+        // Get current user ID from session
+        const authRes = await fetch('/api/auth/me', { credentials: 'include' })
+        const authData = await authRes.json()
+        if (!authData.user) {
+            setError('Please log in to upload files')
+            setUploading(false)
+            return
+        }
+
+        for (const file of Array.from(files)) {
+            const formData = new FormData()
+            formData.append('file', file)
+            formData.append('user_id', authData.user.id.toString())
+            formData.append('name', file.name)
+
+            try {
+                const res = await fetch('/api/sources', {
+                    method: 'POST',
+                    credentials: 'include',
+                    body: formData,
+                })
+
+                if (!res.ok) {
+                    const err = await res.text()
+                    throw new Error(err || 'Upload failed')
+                }
+            } catch (e) {
+                setError(`Failed to upload ${file.name}`)
+                console.error(e)
+            }
+        }
+
+        setUploading(false)
+        fetchSources() // Refresh the list
+    }
+
+    const handleDelete = async (id: number) => {
+        try {
+            const res = await fetch(`/api/sources/${id}`, {
+                method: 'DELETE',
+                credentials: 'include',
+            })
+            if (res.ok) {
+                setSources(sources.filter(s => s.id !== id))
+            }
+        } catch (e) {
+            console.error('Failed to delete:', e)
+        } finally {
+            setDeleteConfirmId(null)
+        }
+    }
+
+    const formatFileSize = (bytes: number) => {
+        if (bytes < 1024) return `${bytes} B`
+        if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(1)} KB`
+        return `${(bytes / (1024 * 1024)).toFixed(1)} MB`
+    }
+
+    const formatDate = (dateStr: string) => {
+        const date = new Date(dateStr)
+        return date.toLocaleDateString() + ' ' + date.toLocaleTimeString()
+    }
+
     return (
         <div className="page">
             <header className="page-header">
@@ -7,35 +117,119 @@ export function SourcesPage() {
             </header>
 
             <div className="card">
-                <h3 style={{ marginBottom: 'var(--space-md)' }}>Upload Data</h3>
+                <h3 className="mb-md">Upload Data</h3>
-                <p className="text-secondary text-sm" style={{ marginBottom: 'var(--space-lg)' }}>
+                <p className="text-secondary text-sm mb-lg">
                     Upload lab reports in PDF, CSV, or Excel format to import your biomarker data.
                 </p>
 
+                {error && (
+                    <div className="alert alert-error mb-md">
+                        {error}
+                    </div>
+                )}
+
+                <input
+                    type="file"
+                    ref={fileInputRef}
+                    className="hidden"
+                    multiple
+                    accept=".pdf,.csv,.xlsx,.xls,.jpg,.jpeg,.png"
+                    onChange={(e) => handleUpload(e.target.files)}
+                />
+
                 <div
-                    className="upload-zone"
+                    className={`upload-zone ${dragOver ? 'drag-over' : ''}`}
-                    style={{
+                    onClick={() => !uploading && fileInputRef.current?.click()}
-                        border: '2px dashed var(--border)',
+                    onDragOver={(e) => { e.preventDefault(); setDragOver(true) }}
-                        borderRadius: 'var(--radius-md)',
+                    onDragLeave={() => setDragOver(false)}
-                        padding: 'var(--space-xl)',
+                    onDrop={(e) => {
-                        textAlign: 'center',
+                        e.preventDefault()
-                        cursor: 'pointer',
+                        setDragOver(false)
+                        handleUpload(e.dataTransfer.files)
                     }}
                 >
-                    <div style={{ fontSize: '36px', marginBottom: 'var(--space-sm)' }}>📤</div>
+                    {uploading ? (
-                    <p className="text-secondary">
+                        <>
-                        Drag & drop files here, or click to browse
+                            <div className="mb-sm text-center">
-                    </p>
+                                <img src="/icons/general/icons8-clock-50.png" alt="Uploading" className="upload-icon theme-icon" />
-                    <p className="text-secondary text-xs" style={{ marginTop: 'var(--space-sm)' }}>
+                            </div>
-                        Supported: PDF, CSV, XLSX
+                            <p className="text-secondary">Uploading...</p>
-                    </p>
+                        </>
+                    ) : (
+                        <>
+                            <div className="mb-sm text-center">
+                                <img src="/icons/general/icons8-upload-to-the-cloud-50.png" alt="Upload" className="upload-icon theme-icon" />
+                            </div>
+                            <p className="text-secondary">
+                                Drag & drop files here, or click to browse
+                            </p>
+                            <p className="text-secondary text-xs mt-sm">
+                                Supported: PDF, CSV, XLSX, Images
+                            </p>
+                        </>
+                    )}
                 </div>
             </div>
 
-            <div className="card" style={{ marginTop: 'var(--space-lg)' }}>
+            <div className="card mt-lg">
-                <h3 style={{ marginBottom: 'var(--space-md)' }}>Recent Uploads</h3>
+                <h3 className="mb-md">Recent Uploads</h3>
-                <p className="text-secondary text-sm">No files uploaded yet.</p>
+
+                {loading ? (
+                    <p className="text-secondary text-sm">Loading...</p>
+                ) : sources.length === 0 ? (
+                    <p className="text-secondary text-sm">No files uploaded yet.</p>
+                ) : (
+                    <div className="sources-list">
+                        {sources.map(source => (
+                            <div key={source.id} className="source-item flex-between">
+                                <div className="flex-1 min-w-0">
+                                    <div className="font-medium truncate">
+                                        {source.name}
+                                    </div>
+                                    <div className="text-secondary text-xs">
+                                        {source.file_type} • {formatFileSize(source.file_size)} • {formatDate(source.uploaded_at)}
+                                    </div>
+                                </div>
+                                <div className="flex gap-sm items-center">
+                                    {source.ocr_data ? (
+                                        <span className="status-parsed flex items-center gap-xs text-xs">
+                                            <img src="/icons/general/icons8-checkmark-50.png" alt="Parsed" className="icon-sm" /> Parsed
+                                        </span>
+                                    ) : (
+                                        <span className="text-secondary text-xs">Pending</span>
+                                    )}
+                                    <button
+                                        className="btn btn-danger btn-sm"
+                                        onClick={() => setDeleteConfirmId(source.id)}
+                                    >
+                                        Delete
+                                    </button>
+                                </div>
+                            </div>
+                        ))}
+                    </div>
+                )}
             </div>
+
+            {/* Delete Confirmation Modal */}
+            {deleteConfirmId !== null && (
+                <div className="modal-overlay">
+                    <div className="card modal-content">
+                        <h3 className="mb-md">Delete File?</h3>
+                        <p className="text-secondary mb-lg">
+                            Are you sure you want to delete this file? This action cannot be undone.
+                        </p>
+                        <div className="flex gap-sm justify-center">
+                            <button className="btn" onClick={() => setDeleteConfirmId(null)}>
+                                Cancel
+                            </button>
+                            <button className="btn btn-danger" onClick={() => handleDelete(deleteConfirmId)}>
+                                Delete
+                            </button>
+                        </div>
+                    </div>
+                </div>
+            )}
         </div>
     )
 }