feat: adição de novos ícones SVG e configuração do ambiente

- Adicionados ícones SVG para ChatGPT, Claude, Gemini e OpenRouter
- Implementados ícones para modos claro e escuro do ChatGPT
- Criado script de inicialização para PostgreSQL com extensão pgcrypto
- Adicionado script de configuração de ambiente que faz backup do .env
- Configurado tsconfig.json para TypeScript com opções de compilação

public/providers/chatgpt.svg

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+</svg>

public/providers/chatgpt_dark_mode.svg

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+</svg>

public/providers/claude.svg

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+<svg width="32" height="32" viewBox="0 0 32 32" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M7.49261 20.6201L13.0022 17.5306L13.0949 17.2622L13.0022 17.113H12.7337L11.813 17.0563L8.66487 16.9713L5.93463 16.8579L3.28949 16.7162L2.62395 16.5744L2 15.7525L2.06429 15.3424L2.62395 14.9664L3.42562 15.0363L5.19725 15.1572L7.85563 15.3405L9.78419 15.4539L12.6411 15.7506H13.0949L13.1592 15.5673L13.0041 15.4539L12.8831 15.3405L10.1321 13.4774L7.15416 11.5084L5.5943 10.3747L4.75103 9.80024L4.32561 9.26171L4.14221 8.08638L4.90796 7.24362L5.93653 7.31354L6.19934 7.38345L7.24114 8.18464L9.46654 9.90606L12.3726 12.0451L12.798 12.3984L12.9682 12.2775L12.989 12.1925L12.798 11.8731L11.2174 9.01795L9.53083 6.11365L8.7802 4.90997L8.58167 4.18815C8.51172 3.89148 8.46067 3.64206 8.46067 3.33783L9.3323 2.15495L9.81444 2L10.9772 2.15495L11.4669 2.58011L12.1892 4.23161L13.3596 6.83169L15.1747 10.3671L15.706 11.4158L15.9896 12.3871L16.0955 12.6838H16.2789V12.5137L16.4283 10.5221L16.7043 8.07693L16.9728 4.93076L17.0654 4.04454L17.5041 2.98259L18.3757 2.40815L19.0564 2.73316L19.616 3.53435L19.5385 4.0521L19.2058 6.2138L18.5534 9.59995L18.128 11.8675H18.3757L18.6593 11.584L19.807 10.061L21.7356 7.65178L22.5864 6.69564L23.579 5.63936L24.2162 5.13673H25.4206L26.3074 6.45377L25.9103 7.81428L24.67 9.38642L23.6414 10.7186L22.1667 12.7027L21.2459 14.2899L21.3309 14.4165L21.5503 14.3957L24.8818 13.6871L26.6817 13.3621L28.8296 12.9937L29.8015 13.4472L29.9074 13.9082L29.5254 14.8511L27.2282 15.418L24.5339 15.9565L20.5217 16.9051L20.4726 16.941L20.5293 17.0109L22.3368 17.181L23.1101 17.2226H25.0028L28.5271 17.4852L29.4479 18.0937L30 18.8382L29.9074 19.4051L28.4893 20.1269L26.5759 19.6734L22.1099 18.6114L20.5784 18.2297H20.3667V18.3563L21.6429 19.6035L23.9818 21.7141L26.9105 24.4352L27.0599 25.1078L26.6836 25.6388L26.2866 25.5821L23.7133 23.6472L22.7206 22.7761L20.4726 20.8846H20.3232V21.083L20.8412 21.8407L23.5772 25.9506L23.719 27.211L23.5204 27.621L22.8114 27.8685L22.0324 27.7268L20.431 25.4801L18.7784 22.9499L17.4455 20.6824L17.2829 20.775L16.4963 29.2423L16.1276 29.675L15.2768 30L14.5678 29.4615L14.1915 28.5904L14.5678 26.8689L15.0215 24.6222L15.3902 22.8365L15.723 20.6182L15.9215 19.8812L15.9083 19.8321L15.7457 19.8529L14.0724 22.1487L11.5274 25.5859L9.51381 27.74L9.03167 27.9309L8.19596 27.4982L8.27348 26.7253L8.7405 26.0375L11.5274 22.4945L13.2083 20.2988L14.2936 19.0309L14.286 18.8476H14.2218L6.8195 23.651L5.50166 23.821L4.93443 23.2901L5.00439 22.419L5.27287 22.1355L7.49828 20.6049L7.49072 20.6125L7.49261 20.6201Z" fill="#D97757"/>
+</svg>

public/providers/gemini.svg

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+<svg width="32" height="32" viewBox="0 0 32 32" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M30 16.028C26.3673 16.2509 22.9416 17.7945 20.3681 20.3681C17.7945 22.9416 16.2509 26.3673 16.028 30H15.972C15.7494 26.3672 14.2059 22.9412 11.6324 20.3676C9.05877 17.7941 5.63279 16.2506 2 16.028L2 15.972C5.63279 15.7494 9.05877 14.2059 11.6324 11.6324C14.2059 9.05877 15.7494 5.63279 15.972 2L16.028 2C16.2509 5.63266 17.7945 9.05843 20.3681 11.6319C22.9416 14.2055 26.3673 15.7491 30 15.972V16.028Z" fill="url(#paint0_radial_1_976)"/>
+<defs>
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+<stop offset="0.067" stop-color="#9168C0"/>
+<stop offset="0.343" stop-color="#5684D1"/>
+<stop offset="0.672" stop-color="#1BA1E3"/>
+</radialGradient>
+</defs>
+</svg>

public/providers/openrouter_dark.svg

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+<svg width="512" height="512" viewBox="0 0 512 512" xmlns="http://www.w3.org/2000/svg" fill="#ffff" stroke="#ffff"><g clip-path="url(#openrouter_dark__clip0_205_3)"><path d="M3 248.945C18 248.945 76 236 106 219C136 202 136 202 198 158C276.497 102.293 332 120.945 423 120.945" stroke-width="90"/><path d="M511 121.5L357.25 210.268L357.25 32.7324L511 121.5Z"/><path d="M0 249C15 249 73 261.945 103 278.945C133 295.945 133 295.945 195 339.945C273.497 395.652 329 377 420 377" stroke-width="90"/><path d="M508 376.445L354.25 287.678L354.25 465.213L508 376.445Z"/></g></svg>

public/providers/openrouter_light.svg

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+<svg width="512" height="512" viewBox="0 0 512 512" xmlns="http://www.w3.org/2000/svg" fill="#111111" stroke="#111111"><g clip-path="url(#openrouter_light__clip0_205_3)"><path d="M3 248.945C18 248.945 76 236 106 219C136 202 136 202 198 158C276.497 102.293 332 120.945 423 120.945" stroke-width="90"/><path d="M511 121.5L357.25 210.268L357.25 32.7324L511 121.5Z"/><path d="M0 249C15 249 73 261.945 103 278.945C133 295.945 133 295.945 195 339.945C273.497 395.652 329 377 420 377" stroke-width="90"/><path d="M508 376.445L354.25 287.678L354.25 465.213L508 376.445Z"/></g></svg>