feat: add Phase 4 Logging & Tracking — inline set logging, history views

Add workout logging so users can track sets, reps, weight, and a
"felt easy?" toggle inline from the workout day view via HTMX.
Sessions auto-create on first log. History page shows past sessions
with detailed per-exercise breakdowns.

New services: WorkoutSessionService, LogService
New routes: POST /log, /log/{id}/edit, /log/{id}/delete, GET /history, /history/{id}
New templates: log_form, log_entry, session_card, log_history, session_detail
Modified: exercise_card (inline logging), nav (History link), workouts route (session context)

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

app/main.py

@@ -24,9 +24,11 @@ from app.database import get_engine, get_db_session
 from app.logging_config import setup_logging
 from app.routes.auth import router as auth_router
 from app.routes.exercises import router as exercises_router
+from app.routes.history import router as history_router
 from app.routes.health import router as health_router
 from app.routes.pages import router as pages_router
 from app.routes.profiles import router as profiles_router
+from app.routes.logging import router as logging_router
 from app.routes.workouts import router as workouts_router
 from app.services.seed_service import SeedService
 from app.services.auth_service import AuthService
@@ -104,6 +106,8 @@ def create_app() -> FastAPI:
     app.include_router(auth_router)
     app.include_router(exercises_router)
     app.include_router(health_router)
+    app.include_router(history_router)
+    app.include_router(logging_router)
     app.include_router(pages_router)
     app.include_router(profiles_router)
     app.include_router(workouts_router)

app/routes/history.py

@@ -0,0 +1,113 @@
+"""Log history routes for viewing past workout sessions.
+
+Displays a list of past sessions and detailed logs per session.
+"""
+
+import structlog
+from fastapi import APIRouter, Depends, Request
+from fastapi.responses import HTMLResponse
+from sqlmodel import Session
+
+from app.database import get_db_session
+from app.models.user import User
+from app.services.exercise_service import ExerciseService
+from app.services.log_service import LogService
+from app.services.workout_session_service import WorkoutSessionService
+from app.utils.auth import get_current_admin_user, get_active_profile_id
+
+logger = structlog.get_logger(__name__)
+
+router = APIRouter(prefix="/history", tags=["history"])
+
+
+@router.get("", response_class=HTMLResponse)
+async def log_history(
+    request: Request,
+    session: Session = Depends(get_db_session),
+    admin: User = Depends(get_current_admin_user),
+):
+    """Display log history for the active profile.
+
+    Shows a list of past workout sessions, most recent first.
+
+    Args:
+        request: The incoming HTTP request.
+        session: Database session.
+        admin: The authenticated admin user.
+
+    Returns:
+        Rendered log history page.
+    """
+    active_profile_id = get_active_profile_id(request)
+    active_profile = (
+        session.get(User, active_profile_id)
+        if active_profile_id
+        else None
+    )
+
+    sessions_list = []
+    if active_profile_id:
+        ws_service = WorkoutSessionService(session)
+        sessions_list = ws_service.list_sessions(user_id=active_profile_id)
+
+    # Resolve workout day names for display
+    exercise_service = ExerciseService(session)
+    days_by_id = {d.id: d for d in exercise_service.list_workout_days()}
+
+    templates = request.app.state.templates
+    return templates.TemplateResponse("pages/log_history.html", {
+        "request": request,
+        "sessions": sessions_list,
+        "days_by_id": days_by_id,
+        "active_profile": active_profile,
+        "admin": admin,
+    })
+
+
+@router.get("/{session_id}", response_class=HTMLResponse)
+async def session_detail(
+    session_id: int,
+    request: Request,
+    session: Session = Depends(get_db_session),
+    admin: User = Depends(get_current_admin_user),
+):
+    """Display detailed logs for a specific workout session.
+
+    Args:
+        session_id: The workout session ID.
+        request: The incoming HTTP request.
+        session: Database session.
+        admin: The authenticated admin user.
+
+    Returns:
+        Rendered session detail page.
+    """
+    ws_service = WorkoutSessionService(session)
+    ws = ws_service.get_session_by_id(session_id)
+
+    log_service = LogService(session)
+    logs = log_service.list_logs_for_session(session_id)
+
+    # Group logs by exercise
+    exercise_service = ExerciseService(session)
+    exercises_by_id = {}
+    logs_by_exercise = {}
+    for log in logs:
+        if log.exercise_id not in exercises_by_id:
+            exercises_by_id[log.exercise_id] = (
+                exercise_service.get_exercise_by_id(log.exercise_id)
+            )
+        logs_by_exercise.setdefault(log.exercise_id, []).append(log)
+
+    # Resolve workout day name
+    days_by_id = {d.id: d for d in exercise_service.list_workout_days()}
+
+    templates = request.app.state.templates
+    return templates.TemplateResponse("pages/session_detail.html", {
+        "request": request,
+        "workout_session": ws,
+        "logs_by_exercise": logs_by_exercise,
+        "exercises_by_id": exercises_by_id,
+        "days_by_id": days_by_id,
+        "admin": admin,
+    })

app/routes/logging.py

@@ -0,0 +1,177 @@
+"""Workout logging routes for inline set tracking.
+
+Handles creating, editing, and deleting individual set logs.
+All responses are HTMX partials that update in place.
+"""
+
+from datetime import date
+
+import structlog
+from fastapi import APIRouter, Depends, Request
+from fastapi.responses import HTMLResponse
+from sqlmodel import Session
+
+from app.database import get_db_session
+from app.models.user import User
+from app.services.log_service import LogService
+from app.services.workout_session_service import WorkoutSessionService
+from app.utils.auth import get_current_admin_user, get_active_profile_id
+
+logger = structlog.get_logger(__name__)
+
+router = APIRouter(prefix="/log", tags=["logging"])
+
+
+@router.post("", response_class=HTMLResponse)
+async def log_set(
+    request: Request,
+    session: Session = Depends(get_db_session),
+    admin: User = Depends(get_current_admin_user),
+):
+    """Log a single set for an exercise.
+
+    Creates the workout session if it doesn't exist yet (auto-create).
+    Returns the updated log entries partial for this exercise.
+
+    Args:
+        request: The incoming HTTP request.
+        session: Database session.
+        admin: The authenticated admin user.
+
+    Returns:
+        Rendered log entries partial for this exercise.
+    """
+    form = await request.form()
+    exercise_id = int(form.get("exercise_id", 0))
+    workout_day_id = int(form.get("workout_day_id", 0))
+    set_number = int(form.get("set_number", 1))
+    reps = int(form.get("reps", 0))
+    weight = form.get("weight", "")
+    felt_easy = form.get("felt_easy") == "on"
+
+    active_profile_id = get_active_profile_id(request)
+    if not active_profile_id:
+        templates = request.app.state.templates
+        return templates.TemplateResponse("partials/flash_message.html", {
+            "request": request,
+            "flash_error": "No profile selected. Switch profiles first.",
+        })
+
+    # Get or create today's session
+    ws_service = WorkoutSessionService(session)
+    ws = ws_service.get_or_create_session(
+        user_id=active_profile_id,
+        workout_day_id=workout_day_id,
+        session_date=date.today(),
+    )
+
+    # Create the log entry
+    log_service = LogService(session)
+    log_service.create_log(
+        session_id=ws.id,
+        exercise_id=exercise_id,
+        set_number=set_number,
+        reps_completed=reps,
+        weight_used=weight,
+        felt_easy=felt_easy,
+    )
+
+    # Return updated logs for this exercise
+    logs = log_service.list_logs_for_exercise(ws.id, exercise_id)
+    next_set = len(logs) + 1
+
+    templates = request.app.state.templates
+    return templates.TemplateResponse("partials/log_entry.html", {
+        "request": request,
+        "logs": logs,
+        "exercise_id": exercise_id,
+        "workout_day_id": workout_day_id,
+        "next_set": next_set,
+        "session_id": ws.id,
+    })
+
+
+@router.post("/{log_id}/edit", response_class=HTMLResponse)
+async def edit_log(
+    log_id: int,
+    request: Request,
+    session: Session = Depends(get_db_session),
+    admin: User = Depends(get_current_admin_user),
+):
+    """Edit an existing log entry.
+
+    Args:
+        log_id: The log entry ID.
+        request: The incoming HTTP request.
+        session: Database session.
+        admin: The authenticated admin user.
+
+    Returns:
+        Rendered updated log entry partial.
+    """
+    form = await request.form()
+    log_service = LogService(session)
+
+    log_service.update_log(
+        log_id,
+        reps_completed=int(form.get("reps", 0)),
+        weight_used=form.get("weight", ""),
+        felt_easy=form.get("felt_easy") == "on",
+        notes=form.get("notes"),
+    )
+
+    log = log_service.get_log_by_id(log_id)
+    logs = log_service.list_logs_for_exercise(log.session_id, log.exercise_id)
+    next_set = len(logs) + 1
+
+    templates = request.app.state.templates
+    return templates.TemplateResponse("partials/log_entry.html", {
+        "request": request,
+        "logs": logs,
+        "exercise_id": log.exercise_id,
+        "workout_day_id": 0,
+        "next_set": next_set,
+        "session_id": log.session_id,
+    })
+
+
+@router.post("/{log_id}/delete", response_class=HTMLResponse)
+async def delete_log(
+    log_id: int,
+    request: Request,
+    session: Session = Depends(get_db_session),
+    admin: User = Depends(get_current_admin_user),
+):
+    """Delete a log entry.
+
+    Args:
+        log_id: The log entry ID.
+        request: The incoming HTTP request.
+        session: Database session.
+        admin: The authenticated admin user.
+
+    Returns:
+        Rendered updated log entries partial.
+    """
+    log_service = LogService(session)
+    log = log_service.get_log_by_id(log_id)
+
+    if log:
+        exercise_id = log.exercise_id
+        session_id = log.session_id
+        log_service.delete_log(log_id)
+
+        logs = log_service.list_logs_for_exercise(session_id, exercise_id)
+        next_set = len(logs) + 1
+
+        templates = request.app.state.templates
+        return templates.TemplateResponse("partials/log_entry.html", {
+            "request": request,
+            "logs": logs,
+            "exercise_id": exercise_id,
+            "workout_day_id": 0,
+            "next_set": next_set,
+            "session_id": session_id,
+        })
+
+    return HTMLResponse("")

app/routes/workouts.py

@@ -4,6 +4,8 @@ Displays the warmup routine and main exercises for each workout day,
 with the active profile's programming targets.
 """
 
+from datetime import date
+
 import structlog
 from fastapi import APIRouter, Depends, Request
 from fastapi.responses import HTMLResponse
@@ -13,6 +15,8 @@ from app.database import get_db_session
 from app.models.user import User
 from app.models.user_exercise_program import UserExerciseProgram
 from app.services.exercise_service import ExerciseService
+from app.services.log_service import LogService
+from app.services.workout_session_service import WorkoutSessionService
 from app.utils.auth import get_current_admin_user, get_active_profile_id
 
 logger = structlog.get_logger(__name__)
@@ -77,6 +81,7 @@ async def workout_day_detail(
     active_profile_id = get_active_profile_id(request)
     programs = {}
     active_profile = None
+    existing_logs = {}
     if active_profile_id:
         active_profile = session.get(User, active_profile_id)
         if active_profile:
@@ -86,6 +91,27 @@ async def workout_day_detail(
             for prog in session.exec(statement).all():
                 programs[prog.exercise_id] = prog
 
+    # Look up the workout day ID for logging forms
+    days = exercise_service.list_workout_days()
+    workout_day_id = 0
+    for d in days:
+        if d.name == day_display:
+            workout_day_id = d.id
+            break
+
+    # Load existing logs for today's session (if any)
+    if active_profile_id and workout_day_id:
+        ws_service = WorkoutSessionService(session)
+        ws = ws_service.get_or_create_session(
+            user_id=active_profile_id,
+            workout_day_id=workout_day_id,
+            session_date=date.today(),
+        )
+        log_service = LogService(session)
+        all_logs = log_service.list_logs_for_session(ws.id)
+        for log in all_logs:
+            existing_logs.setdefault(log.exercise_id, []).append(log)
+
     templates = request.app.state.templates
     return templates.TemplateResponse("pages/workout_day.html", {
         "request": request,
@@ -94,5 +120,7 @@ async def workout_day_detail(
         "exercises": exercises,
         "programs": programs,
         "active_profile": active_profile,
+        "existing_logs": existing_logs,
+        "workout_day_id": workout_day_id,
         "admin": admin,
     })

app/services/log_service.py

@@ -0,0 +1,195 @@
+"""Service layer for workout log (set-level) data access.
+
+Handles CRUD for individual set logs within workout sessions.
+"""
+
+from typing import Optional
+
+import structlog
+from sqlmodel import Session, select
+
+from app.models.workout_log import WorkoutLog
+from app.models.workout_session import WorkoutSession
+
+logger = structlog.get_logger(__name__)
+
+
+class LogService:
+    """Handles CRUD operations for WorkoutLog records.
+
+    Args:
+        session: An active SQLModel Session.
+    """
+
+    def __init__(self, session: Session) -> None:
+        self._session = session
+
+    def create_log(
+        self,
+        session_id: int,
+        exercise_id: int,
+        set_number: int,
+        reps_completed: int,
+        weight_used: str,
+        felt_easy: bool,
+        notes: Optional[str] = None,
+    ) -> WorkoutLog:
+        """Create a new set log entry.
+
+        Args:
+            session_id: FK to workout_sessions.
+            exercise_id: FK to exercises.
+            set_number: Which set (1, 2, 3...).
+            reps_completed: Actual reps performed.
+            weight_used: Weight as string (e.g., "30 lbs").
+            felt_easy: Whether the set felt easy.
+            notes: Optional notes for this set.
+
+        Returns:
+            The newly created WorkoutLog record.
+        """
+        log = WorkoutLog(
+            session_id=session_id,
+            exercise_id=exercise_id,
+            set_number=set_number,
+            reps_completed=reps_completed,
+            weight_used=weight_used,
+            felt_easy=felt_easy,
+            notes=notes,
+        )
+        self._session.add(log)
+        self._session.commit()
+        self._session.refresh(log)
+        logger.info(
+            "log_created",
+            session_id=session_id,
+            exercise_id=exercise_id,
+            set=set_number,
+        )
+        return log
+
+    def list_logs_for_session(self, session_id: int) -> list[WorkoutLog]:
+        """List all log entries for a workout session.
+
+        Args:
+            session_id: The workout session ID.
+
+        Returns:
+            List of WorkoutLog records ordered by exercise and set number.
+        """
+        statement = (
+            select(WorkoutLog)
+            .where(WorkoutLog.session_id == session_id)
+            .order_by(WorkoutLog.exercise_id, WorkoutLog.set_number)
+        )
+        return list(self._session.exec(statement).all())
+
+    def list_logs_for_exercise(
+        self,
+        session_id: int,
+        exercise_id: int,
+    ) -> list[WorkoutLog]:
+        """List log entries for a specific exercise within a session.
+
+        Args:
+            session_id: The workout session ID.
+            exercise_id: The exercise ID.
+
+        Returns:
+            List of WorkoutLog records for this exercise, ordered by set.
+        """
+        statement = (
+            select(WorkoutLog)
+            .where(
+                WorkoutLog.session_id == session_id,
+                WorkoutLog.exercise_id == exercise_id,
+            )
+            .order_by(WorkoutLog.set_number)
+        )
+        return list(self._session.exec(statement).all())
+
+    def get_log_by_id(self, log_id: int) -> Optional[WorkoutLog]:
+        """Retrieve a log entry by primary key.
+
+        Args:
+            log_id: The log entry ID.
+
+        Returns:
+            The WorkoutLog record, or None if not found.
+        """
+        return self._session.get(WorkoutLog, log_id)
+
+    def update_log(self, log_id: int, **kwargs) -> WorkoutLog:
+        """Update fields on an existing log entry.
+
+        Args:
+            log_id: The log entry ID.
+            **kwargs: Field names and new values.
+
+        Returns:
+            The updated WorkoutLog record.
+
+        Raises:
+            ValueError: If the log is not found.
+        """
+        log = self.get_log_by_id(log_id)
+        if log is None:
+            raise ValueError(f"WorkoutLog with id {log_id} not found")
+
+        for key, value in kwargs.items():
+            if hasattr(log, key):
+                setattr(log, key, value)
+
+        self._session.add(log)
+        self._session.commit()
+        self._session.refresh(log)
+        logger.info("log_updated", log_id=log_id, fields=list(kwargs.keys()))
+        return log
+
+    def delete_log(self, log_id: int) -> None:
+        """Delete a log entry.
+
+        Args:
+            log_id: The log entry ID.
+
+        Raises:
+            ValueError: If the log is not found.
+        """
+        log = self.get_log_by_id(log_id)
+        if log is None:
+            raise ValueError(f"WorkoutLog with id {log_id} not found")
+
+        self._session.delete(log)
+        self._session.commit()
+        logger.info("log_deleted", log_id=log_id)
+
+    def get_latest_logs_for_exercise(
+        self,
+        user_id: int,
+        exercise_id: int,
+        limit: int = 10,
+    ) -> list[WorkoutLog]:
+        """Get the most recent log entries for an exercise across sessions.
+
+        Used by the progression engine (Phase 5) to determine
+        what the user last did for this exercise.
+
+        Args:
+            user_id: The user's ID.
+            exercise_id: The exercise ID.
+            limit: Maximum number of logs to return.
+
+        Returns:
+            List of recent WorkoutLog records, newest first.
+        """
+        statement = (
+            select(WorkoutLog)
+            .join(WorkoutSession, WorkoutLog.session_id == WorkoutSession.id)
+            .where(
+                WorkoutSession.user_id == user_id,
+                WorkoutLog.exercise_id == exercise_id,
+            )
+            .order_by(WorkoutSession.date.desc(), WorkoutLog.set_number)
+            .limit(limit)
+        )
+        return list(self._session.exec(statement).all())

app/services/workout_session_service.py

@@ -0,0 +1,131 @@
+"""Service layer for workout session management.
+
+Handles creation, retrieval, and updates for workout sessions.
+A session represents a single workout on a specific date for a user.
+"""
+
+from datetime import date
+from typing import Optional
+
+import structlog
+from sqlmodel import Session, select
+
+from app.models.workout_session import WorkoutSession
+
+logger = structlog.get_logger(__name__)
+
+
+class WorkoutSessionService:
+    """Handles CRUD operations for WorkoutSession records.
+
+    Args:
+        session: An active SQLModel Session.
+    """
+
+    def __init__(self, session: Session) -> None:
+        self._session = session
+
+    def get_or_create_session(
+        self,
+        user_id: int,
+        workout_day_id: int,
+        session_date: date,
+    ) -> WorkoutSession:
+        """Get an existing session or create a new one.
+
+        If a session already exists for this user + day + date combo,
+        return it. Otherwise, create a new one. This allows logging
+        to start automatically without an explicit "start session" step.
+
+        Args:
+            user_id: The user's ID.
+            workout_day_id: The workout day's ID.
+            session_date: The date of the workout.
+
+        Returns:
+            The existing or newly created WorkoutSession.
+        """
+        statement = select(WorkoutSession).where(
+            WorkoutSession.user_id == user_id,
+            WorkoutSession.workout_day_id == workout_day_id,
+            WorkoutSession.date == session_date,
+        )
+        existing = self._session.exec(statement).first()
+
+        if existing:
+            return existing
+
+        ws = WorkoutSession(
+            user_id=user_id,
+            workout_day_id=workout_day_id,
+            date=session_date,
+        )
+        self._session.add(ws)
+        self._session.commit()
+        self._session.refresh(ws)
+        logger.info(
+            "workout_session_created",
+            user_id=user_id,
+            day_id=workout_day_id,
+            date=str(session_date),
+        )
+        return ws
+
+    def list_sessions(
+        self,
+        user_id: int,
+        limit: int = 50,
+    ) -> list[WorkoutSession]:
+        """List workout sessions for a user, most recent first.
+
+        Args:
+            user_id: The user's ID.
+            limit: Maximum number of sessions to return.
+
+        Returns:
+            List of WorkoutSession records, ordered by date descending.
+        """
+        statement = (
+            select(WorkoutSession)
+            .where(WorkoutSession.user_id == user_id)
+            .order_by(WorkoutSession.date.desc())
+            .limit(limit)
+        )
+        return list(self._session.exec(statement).all())
+
+    def get_session_by_id(self, session_id: int) -> Optional[WorkoutSession]:
+        """Retrieve a workout session by primary key.
+
+        Args:
+            session_id: The session ID.
+
+        Returns:
+            The WorkoutSession record, or None if not found.
+        """
+        return self._session.get(WorkoutSession, session_id)
+
+    def update_session(self, session_id: int, **kwargs) -> WorkoutSession:
+        """Update fields on an existing workout session.
+
+        Args:
+            session_id: The session ID.
+            **kwargs: Field names and new values.
+
+        Returns:
+            The updated WorkoutSession record.
+
+        Raises:
+            ValueError: If the session is not found.
+        """
+        ws = self.get_session_by_id(session_id)
+        if ws is None:
+            raise ValueError(f"WorkoutSession with id {session_id} not found")
+
+        for key, value in kwargs.items():
+            if hasattr(ws, key):
+                setattr(ws, key, value)
+
+        self._session.add(ws)
+        self._session.commit()
+        self._session.refresh(ws)
+        return ws

app/templates/pages/log_history.html

@@ -0,0 +1,23 @@
+{% extends "base.html" %}
+
+{% block title %}Workout History -- SneakySwole{% endblock %}
+
+{% block content %}
+<hgroup>
+    <h1>Workout History</h1>
+    {% if active_profile %}
+    <p>History for: <strong>{{ active_profile.display_name }}</strong></p>
+    {% else %}
+    <p>No profile selected -- <a href="/profiles">select one</a></p>
+    {% endif %}
+</hgroup>
+
+{% if sessions %}
+{% for ws in sessions %}
+    {% set day = days_by_id.get(ws.workout_day_id) %}
+    {% include "partials/session_card.html" %}
+{% endfor %}
+{% else %}
+<p>No workout sessions recorded yet.</p>
+{% endif %}
+{% endblock %}

app/templates/pages/session_detail.html

@@ -0,0 +1,51 @@
+{% extends "base.html" %}
+
+{% block title %}Session Detail -- SneakySwole{% endblock %}
+
+{% block content %}
+<hgroup>
+    {% set day = days_by_id.get(workout_session.workout_day_id) %}
+    <h1>
+        {{ day.name if day else "Workout" }}
+        -- {{ workout_session.date.strftime('%B %d, %Y') }}
+    </h1>
+    {% if workout_session.notes %}
+    <p>{{ workout_session.notes }}</p>
+    {% endif %}
+</hgroup>
+
+{% for exercise_id, logs in logs_by_exercise.items() %}
+    {% set exercise = exercises_by_id[exercise_id] %}
+    <article>
+        <header>
+            <h3>{{ exercise.name }}</h3>
+        </header>
+        <table>
+            <thead>
+                <tr>
+                    <th>Set</th>
+                    <th>Reps</th>
+                    <th>Weight</th>
+                    <th>Easy?</th>
+                    <th>Notes</th>
+                </tr>
+            </thead>
+            <tbody>
+                {% for log in logs %}
+                <tr>
+                    <td>{{ log.set_number }}</td>
+                    <td>{{ log.reps_completed }}</td>
+                    <td>{{ log.weight_used }}</td>
+                    <td>{{ "Yes" if log.felt_easy else "No" }}</td>
+                    <td>{{ log.notes or "" }}</td>
+                </tr>
+                {% endfor %}
+            </tbody>
+        </table>
+    </article>
+{% else %}
+    <p>No exercises logged in this session.</p>
+{% endfor %}
+
+<a href="/history" role="button" class="outline">Back to History</a>
+{% endblock %}

app/templates/partials/exercise_card.html

@@ -24,5 +24,18 @@
         <p>{{ exercise.form_cues }}</p>
     </details>
 
-    <!-- Phase 4 adds: inline logging form here -->
+    <!-- Inline logging (Phase 4) -->
+    {% if active_profile %}
+    <div id="logs-exercise-{{ exercise.id }}">
+        {% if existing_logs and existing_logs[exercise.id] %}
+            {% set logs = existing_logs[exercise.id] %}
+            {% set exercise_id = exercise.id %}
+            {% set next_set = logs|length + 1 %}
+            {% include "partials/log_entry.html" %}
+        {% else %}
+            {% set next_set = 1 %}
+            {% include "partials/log_form.html" %}
+        {% endif %}
+    </div>
+    {% endif %}
 </article>

app/templates/partials/log_entry.html

@@ -0,0 +1,39 @@
+<!-- Displays logged sets for a single exercise within a session -->
+{% if logs %}
+<table>
+    <thead>
+        <tr>
+            <th>Set</th>
+            <th>Reps</th>
+            <th>Weight</th>
+            <th>Easy?</th>
+            <th>Actions</th>
+        </tr>
+    </thead>
+    <tbody>
+        {% for log in logs %}
+        <tr>
+            <td>{{ log.set_number }}</td>
+            <td>{{ log.reps_completed }}</td>
+            <td>{{ log.weight_used }}</td>
+            <td>{{ "Yes" if log.felt_easy else "No" }}</td>
+            <td>
+                <form hx-post="/log/{{ log.id }}/delete"
+                      hx-target="#logs-exercise-{{ exercise_id }}"
+                      hx-swap="innerHTML"
+                      hx-confirm="Delete this set?"
+                      style="display:inline; margin:0;">
+                    <button type="submit" class="outline secondary"
+                            style="padding:0.2rem 0.5rem; font-size:0.8rem;">
+                        Delete
+                    </button>
+                </form>
+            </td>
+        </tr>
+        {% endfor %}
+    </tbody>
+</table>
+{% endif %}
+
+<!-- Next set form -->
+{% include "partials/log_form.html" %}

app/templates/partials/log_form.html

@@ -0,0 +1,24 @@
+<!-- Inline logging form, included inside each exercise_card.html -->
+<form hx-post="/log"
+      hx-target="#logs-exercise-{{ exercise.id }}"
+      hx-swap="innerHTML"
+      style="margin-bottom:0;">
+    <input type="hidden" name="exercise_id" value="{{ exercise.id }}">
+    <input type="hidden" name="workout_day_id" value="{{ workout_day_id }}">
+    <input type="hidden" name="set_number" value="{{ next_set|default(1) }}">
+
+    <div style="display:flex; align-items:center; gap:0.5rem; flex-wrap:wrap;">
+        <small style="white-space:nowrap; opacity:0.7;">Set {{ next_set|default(1) }}</small>
+        <input type="number" name="reps" placeholder="Reps"
+               min="0" max="100" required
+               style="width:5rem; margin-bottom:0;">
+        <input type="text" name="weight" placeholder="Weight (lbs)"
+               required
+               style="width:8rem; margin-bottom:0;">
+        <label style="display:flex; align-items:center; gap:0.3rem; margin-bottom:0; white-space:nowrap;">
+            <input type="checkbox" name="felt_easy" role="switch" style="margin-bottom:0;">
+            Easy?
+        </label>
+        <button type="submit" style="margin-bottom:0; width:auto; white-space:nowrap;">Log Set</button>
+    </div>
+</form>

app/templates/partials/nav.html

@@ -27,6 +27,7 @@
     </details>
 </li>
 <li><a href="/workouts">Workouts</a></li>
+<li><a href="/history">History</a></li>
 <li><a href="/exercises">Exercises</a></li>
 <li><a href="/profiles">Profiles</a></li>
 <li><a href="/logout">Logout</a></li>

app/templates/partials/session_card.html

@@ -0,0 +1,16 @@
+<article>
+    <header>
+        <hgroup>
+            <h3>{{ day.name if day else "Unknown" }} Day</h3>
+            <p>{{ ws.date.strftime('%A, %B %d, %Y') }}</p>
+        </hgroup>
+    </header>
+    {% if ws.notes %}
+    <p>{{ ws.notes }}</p>
+    {% endif %}
+    <footer>
+        <a href="/history/{{ ws.id }}" role="button" class="outline">
+            View Details
+        </a>
+    </footer>
+</article>

tests/test_history_routes.py

@@ -0,0 +1,21 @@
+"""Tests for log history routes."""
+
+from fastapi.testclient import TestClient
+
+
+class TestLogHistory:
+    """Tests for GET /history."""
+
+    def test_history_requires_auth(self, client: TestClient) -> None:
+        """GET /history should require admin login."""
+        response = client.get("/history", follow_redirects=False)
+        assert response.status_code in (401, 303)
+
+
+class TestSessionDetail:
+    """Tests for GET /history/<session_id>."""
+
+    def test_session_detail_requires_auth(self, client: TestClient) -> None:
+        """GET /history/1 should require admin login."""
+        response = client.get("/history/1", follow_redirects=False)
+        assert response.status_code in (401, 303)

tests/test_log_service.py

@@ -0,0 +1,107 @@
+"""Tests for the LogService class."""
+
+from datetime import date
+
+from sqlmodel import SQLModel, Session, create_engine
+
+from app.models.user import User
+from app.models.exercise import Exercise
+from app.models.workout_day import WorkoutDay
+from app.models.workout_session import WorkoutSession
+from app.models.workout_log import WorkoutLog
+from app.services.log_service import LogService
+
+
+class TestLogService:
+    """Tests for workout log CRUD operations."""
+
+    def _setup(self):
+        """Create an in-memory DB with prerequisite data."""
+        engine = create_engine("sqlite:///:memory:")
+        SQLModel.metadata.create_all(engine)
+        session = Session(engine)
+
+        user = User(username="phil", password_hash="h", display_name="Phillip")
+        day = WorkoutDay(name="Push", day_number=1, description="Push day")
+        exercise = Exercise(
+            name="DB Chest Press", muscle_group="Chest",
+            workout_day="Push", sets=3, tempo="3-1-2", form_cues="...",
+        )
+        session.add_all([user, day, exercise])
+        session.commit()
+        session.refresh(user)
+        session.refresh(day)
+        session.refresh(exercise)
+
+        ws = WorkoutSession(
+            user_id=user.id, workout_day_id=day.id, date=date.today(),
+        )
+        session.add(ws)
+        session.commit()
+        session.refresh(ws)
+
+        service = LogService(session)
+        return session, service, ws, exercise
+
+    def test_create_log_entry(self) -> None:
+        """create_log should insert a new log entry."""
+        session, service, ws, exercise = self._setup()
+        log = service.create_log(
+            session_id=ws.id,
+            exercise_id=exercise.id,
+            set_number=1,
+            reps_completed=8,
+            weight_used="30 lbs",
+            felt_easy=False,
+        )
+        assert log.id is not None
+        assert log.reps_completed == 8
+        session.close()
+
+    def test_list_logs_for_session(self) -> None:
+        """list_logs_for_session should return all logs for a session."""
+        session, service, ws, exercise = self._setup()
+        service.create_log(ws.id, exercise.id, 1, 8, "30 lbs", False)
+        service.create_log(ws.id, exercise.id, 2, 8, "30 lbs", False)
+        service.create_log(ws.id, exercise.id, 3, 7, "30 lbs", True)
+        logs = service.list_logs_for_session(ws.id)
+        assert len(logs) == 3
+        session.close()
+
+    def test_list_logs_for_exercise_in_session(self) -> None:
+        """list_logs_for_exercise should filter by exercise within a session."""
+        session, service, ws, exercise = self._setup()
+        service.create_log(ws.id, exercise.id, 1, 8, "30 lbs", False)
+        logs = service.list_logs_for_exercise(ws.id, exercise.id)
+        assert len(logs) == 1
+        session.close()
+
+    def test_update_log(self) -> None:
+        """update_log should modify an existing log entry."""
+        session, service, ws, exercise = self._setup()
+        log = service.create_log(ws.id, exercise.id, 1, 8, "30 lbs", False)
+        updated = service.update_log(log.id, reps_completed=10, felt_easy=True)
+        assert updated.reps_completed == 10
+        assert updated.felt_easy is True
+        session.close()
+
+    def test_delete_log(self) -> None:
+        """delete_log should remove a log entry."""
+        session, service, ws, exercise = self._setup()
+        log = service.create_log(ws.id, exercise.id, 1, 8, "30 lbs", False)
+        service.delete_log(log.id)
+        logs = service.list_logs_for_session(ws.id)
+        assert len(logs) == 0
+        session.close()
+
+    def test_get_latest_logs_for_exercise(self) -> None:
+        """get_latest_logs should return the most recent logs for an exercise."""
+        session, service, ws, exercise = self._setup()
+        service.create_log(ws.id, exercise.id, 1, 8, "30 lbs", False)
+        service.create_log(ws.id, exercise.id, 2, 8, "30 lbs", True)
+        logs = service.get_latest_logs_for_exercise(
+            user_id=ws.user_id,
+            exercise_id=exercise.id,
+        )
+        assert len(logs) >= 1
+        session.close()

tests/test_logging_routes.py

@@ -0,0 +1,44 @@
+"""Tests for workout logging routes."""
+
+from fastapi.testclient import TestClient
+
+
+class TestLogSet:
+    """Tests for POST /log."""
+
+    def test_log_set_requires_auth(self, client: TestClient) -> None:
+        """POST /log should require admin login."""
+        response = client.post(
+            "/log",
+            data={
+                "exercise_id": "1",
+                "workout_day_id": "1",
+                "set_number": "1",
+                "reps": "8",
+                "weight": "30 lbs",
+            },
+            follow_redirects=False,
+        )
+        assert response.status_code in (401, 303)
+
+
+class TestLogEdit:
+    """Tests for POST /log/<id>/edit."""
+
+    def test_edit_log_requires_auth(self, client: TestClient) -> None:
+        """POST /log/1/edit should require admin login."""
+        response = client.post(
+            "/log/1/edit",
+            data={"reps": "10", "weight": "35 lbs"},
+            follow_redirects=False,
+        )
+        assert response.status_code in (401, 303)
+
+
+class TestLogDelete:
+    """Tests for POST /log/<id>/delete."""
+
+    def test_delete_log_requires_auth(self, client: TestClient) -> None:
+        """POST /log/1/delete should require admin login."""
+        response = client.post("/log/1/delete", follow_redirects=False)
+        assert response.status_code in (401, 303)

tests/test_workout_session_service.py

@@ -0,0 +1,83 @@
+"""Tests for the WorkoutSessionService class."""
+
+from datetime import date
+
+from sqlmodel import SQLModel, Session, create_engine
+
+from app.models.user import User
+from app.models.workout_day import WorkoutDay
+from app.models.workout_session import WorkoutSession
+from app.services.workout_session_service import WorkoutSessionService
+
+
+class TestWorkoutSessionService:
+    """Tests for workout session CRUD operations."""
+
+    def _setup(self):
+        """Create an in-memory DB with prerequisite data."""
+        engine = create_engine("sqlite:///:memory:")
+        SQLModel.metadata.create_all(engine)
+        session = Session(engine)
+
+        user = User(username="phil", password_hash="h", display_name="Phillip")
+        day = WorkoutDay(name="Push", day_number=1, description="Push day")
+        session.add_all([user, day])
+        session.commit()
+        session.refresh(user)
+        session.refresh(day)
+
+        service = WorkoutSessionService(session)
+        return session, service, user, day
+
+    def test_get_or_create_session_creates_new(self) -> None:
+        """get_or_create_session should create a new session if none exists."""
+        session, service, user, day = self._setup()
+        ws = service.get_or_create_session(
+            user_id=user.id,
+            workout_day_id=day.id,
+            session_date=date.today(),
+        )
+        assert ws.id is not None
+        assert ws.user_id == user.id
+        assert ws.workout_day_id == day.id
+        session.close()
+
+    def test_get_or_create_session_returns_existing(self) -> None:
+        """get_or_create_session should return existing session for same day."""
+        session, service, user, day = self._setup()
+        ws1 = service.get_or_create_session(user.id, day.id, date.today())
+        ws2 = service.get_or_create_session(user.id, day.id, date.today())
+        assert ws1.id == ws2.id
+        session.close()
+
+    def test_list_sessions_for_user(self) -> None:
+        """list_sessions should return all sessions for a user."""
+        session, service, user, day = self._setup()
+        service.get_or_create_session(user.id, day.id, date.today())
+        sessions = service.list_sessions(user_id=user.id)
+        assert len(sessions) == 1
+        session.close()
+
+    def test_list_sessions_empty(self) -> None:
+        """list_sessions should return empty list for user with no sessions."""
+        session, service, user, day = self._setup()
+        sessions = service.list_sessions(user_id=user.id)
+        assert len(sessions) == 0
+        session.close()
+
+    def test_get_session_by_id(self) -> None:
+        """get_session_by_id should return the correct session."""
+        session, service, user, day = self._setup()
+        ws = service.get_or_create_session(user.id, day.id, date.today())
+        found = service.get_session_by_id(ws.id)
+        assert found is not None
+        assert found.id == ws.id
+        session.close()
+
+    def test_update_session_notes(self) -> None:
+        """update_session should allow updating notes."""
+        session, service, user, day = self._setup()
+        ws = service.get_or_create_session(user.id, day.id, date.today())
+        updated = service.update_session(ws.id, notes="Great workout!")
+        assert updated.notes == "Great workout!"
+        session.close()