rework icons, add support for dark / light theme

icons/dark/calendar_today.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 -960 960 960" width="24px" fill="#c0c0c0"><path d="M360-300q-42 0-71-29t-29-71q0-42 29-71t71-29q42 0 71 29t29 71q0 42-29 71t-71 29ZM200-80q-33 0-56.5-23.5T120-160v-560q0-33 23.5-56.5T200-800h40v-80h80v80h320v-80h80v80h40q33 0 56.5 23.5T840-720v560q0 33-23.5 56.5T760-80H200Zm0-80h560v-400H200v400Zm0-480h560v-80H200v80Zm0 0v-80 80Z"/></svg>

icons/dark/edit_note.svg

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+<svg xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 -960 960 960" width="24px" fill="#c0c0c0"><path d="M160-400v-80h280v80H160Zm0-160v-80h440v80H160Zm0-160v-80h440v80H160Zm360 560v-123l221-220q9-9 20-13t22-4q12 0 23 4.5t20 13.5l37 37q8 9 12.5 20t4.5 22q0 11-4 22.5T863-380L643-160H520Zm300-263-37-37 37 37ZM580-220h38l121-122-18-19-19-18-122 121v38Zm141-141-19-18 37 37-18-19Z"/></svg>

icons/dark/error.svg

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+<svg xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 -960 960 960" width="24px" fill="#c0c0c0"><path d="M480-280q17 0 28.5-11.5T520-320q0-17-11.5-28.5T480-360q-17 0-28.5 11.5T440-320q0 17 11.5 28.5T480-280Zm-40-160h80v-240h-80v240Zm40 360q-83 0-156-31.5T197-197q-54-54-85.5-127T80-480q0-83 31.5-156T197-763q54-54 127-85.5T480-880q83 0 156 31.5T763-763q54 54 85.5 127T880-480q0 83-31.5 156T763-197q-54 54-127 85.5T480-80Zm0-80q134 0 227-93t93-227q0-134-93-227t-227-93q-134 0-227 93t-93 227q0 134 93 227t227 93Zm0-320Z"/></svg>

icons/dark/mail.svg

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+<svg xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 -960 960 960" width="24px" fill="#c0c0c0"><path d="M160-160q-33 0-56.5-23.5T80-240v-480q0-33 23.5-56.5T160-800h640q33 0 56.5 23.5T880-720v480q0 33-23.5 56.5T800-160H160Zm320-280L160-640v400h640v-400L480-440Zm0-80 320-200H160l320 200ZM160-640v-80 480-400Z"/></svg>

icons/dark/save.svg

@@ -0,0 +1,7 @@
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<!-- Uploaded to: SVG Repo, www.svgrepo.com, Transformed by: SVG Repo Mixer Tools -->
+<svg fill="#c0c0c0" version="1.1" id="Capa_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="800px" height="800px" viewBox="0 0 407.096 407.096" xml:space="preserve" style="--darkreader-inline-fill: #3c4143; --darkreader-inline-stroke: #c0bbb3;" data-darkreader-inline-fill="" stroke="#c0c0c0" data-darkreader-inline-stroke="">
+
+<g id="SVGRepo_bgCarrier" stroke-width="0"/>
+
+<g id="SVGRepo_tracerCarrier" stroke-linecap="round" stroke-linejoin="round"/>

icons/dark/semester.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 -960 960 960" width="24px" fill="#c0c0c0"><path d="M200-80q-33 0-56.5-23.5T120-160v-560q0-33 23.5-56.5T200-800h40v-80h80v80h320v-80h80v80h40q33 0 56.5 23.5T840-720v560q0 33-23.5 56.5T760-80H200Zm0-80h560v-400H200v400Zm0-480h560v-80H200v80Zm0 0v-80 80Zm280 240q-17 0-28.5-11.5T440-440q0-17 11.5-28.5T480-480q17 0 28.5 11.5T520-440q0 17-11.5 28.5T480-400Zm-160 0q-17 0-28.5-11.5T280-440q0-17 11.5-28.5T320-480q17 0 28.5 11.5T360-440q0 17-11.5 28.5T320-400Zm320 0q-17 0-28.5-11.5T600-440q0-17 11.5-28.5T640-480q17 0 28.5 11.5T680-440q0 17-11.5 28.5T640-400ZM480-240q-17 0-28.5-11.5T440-280q0-17 11.5-28.5T480-320q17 0 28.5 11.5T520-280q0 17-11.5 28.5T480-240Zm-160 0q-17 0-28.5-11.5T280-280q0-17 11.5-28.5T320-320q17 0 28.5 11.5T360-280q0 17-11.5 28.5T320-240Zm320 0q-17 0-28.5-11.5T600-280q0-17 11.5-28.5T640-320q17 0 28.5 11.5T680-280q0 17-11.5 28.5T640-240Z"/></svg>

icons/dark/settings.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 -960 960 960" width="24px" fill="#c0c0c0"><path d="m370-80-16-128q-13-5-24.5-12T307-235l-119 50L78-375l103-78q-1-7-1-13.5v-27q0-6.5 1-13.5L78-585l110-190 119 50q11-8 23-15t24-12l16-128h220l16 128q13 5 24.5 12t22.5 15l119-50 110 190-103 78q1 7 1 13.5v27q0 6.5-2 13.5l103 78-110 190-118-50q-11 8-23 15t-24 12L590-80H370Zm70-80h79l14-106q31-8 57.5-23.5T639-327l99 41 39-68-86-65q5-14 7-29.5t2-31.5q0-16-2-31.5t-7-29.5l86-65-39-68-99 42q-22-23-48.5-38.5T533-694l-13-106h-79l-14 106q-31 8-57.5 23.5T321-633l-99-41-39 68 86 64q-5 15-7 30t-2 32q0 16 2 31t7 30l-86 65 39 68 99-42q22 23 48.5 38.5T427-266l13 106Zm42-180q58 0 99-41t41-99q0-58-41-99t-99-41q-59 0-99.5 41T342-480q0 58 40.5 99t99.5 41Zm-2-140Z"/></svg>

icons/dark/visibility_off.svg

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+<svg xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 -960 960 960" width="24px" fill="#c0c0c0"><path d="m644-428-58-58q9-47-27-88t-93-32l-58-58q17-8 34.5-12t37.5-4q75 0 127.5 52.5T660-500q0 20-4 37.5T644-428Zm128 126-58-56q38-29 67.5-63.5T832-500q-50-101-143.5-160.5T480-720q-29 0-57 4t-55 12l-62-62q41-17 84-25.5t90-8.5q151 0 269 83.5T920-500q-23 59-60.5 109.5T772-302Zm20 246L624-222q-35 11-70.5 16.5T480-200q-151 0-269-83.5T40-500q21-53 53-98.5t73-81.5L56-792l56-56 736 736-56 56ZM222-624q-29 26-53 57t-41 67q50 101 143.5 160.5T480-280q20 0 39-2.5t39-5.5l-36-38q-11 3-21 4.5t-21 1.5q-75 0-127.5-52.5T300-500q0-11 1.5-21t4.5-21l-84-82Zm319 93Zm-151 75Z"/></svg>

icons/dark/visibility_on.svg

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+<svg xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 -960 960 960" width="24px" fill="#c0c0c0"><path d="M480-320q75 0 127.5-52.5T660-500q0-75-52.5-127.5T480-680q-75 0-127.5 52.5T300-500q0 75 52.5 127.5T480-320Zm0-72q-45 0-76.5-31.5T372-500q0-45 31.5-76.5T480-608q45 0 76.5 31.5T588-500q0 45-31.5 76.5T480-392Zm0 192q-146 0-266-81.5T40-500q54-137 174-218.5T480-800q146 0 266 81.5T920-500q-54 137-174 218.5T480-200Zm0-300Zm0 220q113 0 207.5-59.5T832-500q-50-101-144.5-160.5T480-720q-113 0-207.5 59.5T128-500q50 101 144.5 160.5T480-280Z"/></svg>

icons/dark/warning.svg

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+<svg xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 -960 960 960" width="24px" fill="#c0c0c0"><path d="m40-120 440-760 440 760H40Zm138-80h604L480-720 178-200Zm302-40q17 0 28.5-11.5T520-280q0-17-11.5-28.5T480-320q-17 0-28.5 11.5T440-280q0 17 11.5 28.5T480-240Zm-40-120h80v-200h-80v200Zm40-100Z"/></svg>